Class / Patent application number | Description | Number of patent applications / Date published |
423430000 | Alkaline earth metal containing (Mg, Ca, Sr, or Ba) | 66 |
20080219912 | Particulate matter and methods of obtaining same from a kraft waste reclamation - A method for obtaining particulate calcium carbonate having an average particle size less than about 12 microns is provided. The method includes the steps of (1) withdrawing from a pulp mill a mixture containing calcium carbonate; (2) treating the mixture to remove contaminants contained in the mixture to produce a treated mixture containing calcium carbonate and further having a chemical composition and/or purity which substantially inhibits the fusing together of calcium carbonate particulates; (3) recovering from the treated mixture particulate calcium carbonate having an average particle size less than about 12 microns. The calcium carbonate produced has a high surface area to volume ratio and is therefore highly reactive and suitable for numerous applications such as in the treatment of soil, filler paper production, paint production, and contaminant containment in coal stack emission assemblies. | 09-11-2008 |
20080260614 | Process for Producing Carbonate Particles - To provide a process for producing carbonate particles, particularly carbonate particles that are needle- or rod-shaped, which can efficiently and readily form carbonate particles which offer orientation birefringence without heating at approximately room temperature, and can control the particle size. In the process, a carbon dioxide gas from a carbonate source is released into the gas phase and the carbon dioxide gas is dissolved in a liquid containing a metal ion source to produce carbonate particles which have an aspect ratio of greater than 1, wherein the metal ion source contains at least one metal ion selected from the group consisting of Sr | 10-23-2008 |
20080292527 | Method for Producing Carbonates - The object of the present invention is to provide a method for producing carbonates capable of effectively and easily forming carbonates shaped to have an orientational birefringence and an aspect ratio greater than 1 as well as capable of controlling the particle size. For this end, it is a method of which a metallic ion source containing at least one selected from Sr | 11-27-2008 |
20090169462 | PRECALCINATION METHOD WITH PRODUCTION OF PURE OR EASILY PURIFIED CO2 ORIGINATING FROM THE DECOMPOSITION OF CARBONATES - The method proposed consists in superheating a stream of calcined material (normally CaO) to a temperature above the calcination temperature and circulating this superheated stream of calcined material to the calciner, where the solids release heat. This calciner is also supplied with the stream of material to be calcined (normally preheated CaCO | 07-02-2009 |
20090232723 | PARTICULATE MATTER AND METHODS OF OBTAINING SAME FROM A KRAFT WASTE RECLAMATION - The present invention relates in general to a method for obtaining particulate calcium carbonate and activated carbon particles and methods for using same, and more particularly, to a method for obtaining activated carbon particles having an average particle size less than about 12 microns from a pulp mill. | 09-17-2009 |
20090269268 | METHOD OF SEPARATING CARBON DIOXIDE FROM GAS MIXTURE USING BIOPOLYMER - Disclosed herein is a method of separating carbon dioxide from a gas mixture using a biopolymer, including: introducing hemocyte or extrapallial fluid, extracted from shells, into a reactor filled with 1L of a solution containing a calcium source, and then dissolving the hemocyte or extrapallial fluid in the solution to form a mixed solution; and mixing carbon dioxide or a gas mixture containing carbon dioxide into the mixed solution to separate carbon dioxide from the gas mixture. | 10-29-2009 |
20100040528 | PROCESS OF PURIFICATION OF MINERALS BASED ON CALCIUM CARBONATE BY FLOTATION IN THE PRESENCE OF QUATENARY IMIDAZOLIUM METHOSULFATE - The invention concerns a process for purification of calcium carbonate-comprising minerals comprising at least one flotation step, characterised in that this step implements at least one quaternary imidazoline methosulfate compound as collector agent. | 02-18-2010 |
20100068119 | Process for Production of Hydrogen and Carbon Dioxide Capture - A process for removing CO | 03-18-2010 |
20100074827 | Process of Preparing Mineral Material with Particular Ceria-Containing Zirconium Oxide Grinding Beads, Obtained Products and their Uses - An object of the present invention is to provide a process to grind at least one mineral material in the presence of ceria (CeO2)-containing zirconium oxide grinding beads having a specific ceria content (of between 14 and 20% by weight relative to the total weight of said bead, preferably of between 15 and 18%, and most preferably of approximately 16%), and a specific average grain size (of less than 1 μm, preferably of less than 0.5 μm, and most preferably of less than 0.3 μm), wherein such beads are more resistant to wear than conventional beads of the prior art. An other object of the present invention lies in the ground material in the form of an aqueous suspension and in the form of a dry product. An other object of the present invention lies in the uses of such products in any sector making use of mineral materials, and notably in the paper, paint and plastic industries. | 03-25-2010 |
20100111809 | USE IN A PAINT OF A DRY-GROUND CALCIUM CARBONATE WITH A COPOLYMER OF (METH)ACRYLIC ACID WITH AN ALKOXY OR HYDROXY POLYALKYLENEGLYCOL GROUP - The invention resides in the use in a paint of a calcium carbonate characterised in that it is obtained by dry-grinding, firstly, and in that it is dry-ground in the presence of a grinding aid agent which is a copolymer of (meth)acrylic acid with a monomer containing an alcoxy or hydroxy polyalkyleneglycol group, secondly. The invention also concerns the paints thus obtained. | 05-06-2010 |
20100111810 | NON-CEMENTITIOUS COMPOSITIONS COMPRISING CO2 SEQUESTERING ADDITIVES - Non-cementitious CO | 05-06-2010 |
20100158786 | DESALINATION METHODS AND SYSTEMS THAT INCLUDE CARBONATE COMPOUND PRECIPITATION - Desalination methods that include carbonate compound precipitation are provided. In certain embodiments, feed water is subjected to carbonate compound precipitation conditions prior to desalination. In certain embodiments, desalination waste brine is subjected to carbonate compound precipitation conditions. In yet other embodiments, both feed water and waste brine are subjected to carbonate compound precipitation conditions. Aspects of embodiments of the invention include carbone dioxide sequestration. Embodiments of the invention further employ a precipitate product of the carbonate compound precipitation conditions as a building material, e.g., a cement. Also provided are systems configured for use in methods of the invention. | 06-24-2010 |
20100215564 | CALCIUM CARBONATE MICROTABLETS AND METHOD FOR THE PREPARATION THEREOF - The invention discloses a method of preparing monodisperse microtablets of calcium carbonate in aqueous solutions containing calcium, gelatin and urea. Calcium carbonate powders of a unique tablet-like morphology were produced by simply ageing the prerefrigerated (at 4° C. for at least 24 hours) CaCI | 08-26-2010 |
20100239487 | NON-CEMENTITIOUS COMPOSITIONS COMPRISING CO2 SEQUESTERING ADDITIVES - Non-cementitious CO | 09-23-2010 |
20110104038 | METHOD OF MAKING PURE SALT FROM FRAC-WATER/WASTEWATER - The present invention relates to a method for making pure salt comprises recapturing post-drilling flowback water from hydro-fracturing; removing oil from the flowback water; filtering the flowback water using an ultra filter with a pore size of about 0.1 microns or less to remove solid particulates and large organic molecules, such as benzene, ethylbenzene, toluene, and xylene, from the water; concentrating the flowback water to produce a brine that contains from about 15 wt % to about 40 wt % of salt relative to the total weight of the flowback brine; performing one or more chemical precipitation process using an effective amount of reagents to precipitate out the desired high quality commercial products, such as, barium sulfate, strontium carbonate, calcium carbonate; and crystallizing the chemically treated and concentrated flowback brine to produce greater than 99.5% pure salt products, such as sodium and calcium chloride. | 05-05-2011 |
20110104039 | PROCESS FOR PREPARING CATALYSTS INVOLVING THE REGENERATION OF METAL CARBONATE PRECIPITANTS - A process for manufacturing a catalyst composition includes the steps of
| 05-05-2011 |
20110129407 | SYSTEMS AND METHODS FOR CAPTURE AND SEQUESTRATION OF GASES AND COMPOSITIONS DERIVED THEREFROM - A method of sequestering a greenhouse gas is described, which comprises: (i) providing a solution carrying a first reagent that is capable of reacting with a greenhouse gas; (ii) contacting the solution with a greenhouse gas under conditions that promote a reaction between the at least first reagent and the greenhouse gas to produce at least a first reactant; (iii) providing a porous matrix having interstitial spaces and comprising at least a second reactant; (iv) allowing a solution carrying the at least first reactant to infiltrate at least a substantial portion of the interstitial spaces of the porous matrix under conditions that promote a reaction between the at least first reactant and the at least second reactant to provide at least a first product; and (v) allowing the at least first product to form and fill at least a portion of the interior spaces of the porous matrix, thereby sequestering a greenhouse gas. | 06-02-2011 |
20110300052 | PARTICULATE MATTER AND METHODS OF OBTAINING SAME FROM A KRAFT WASTE RECLAMATION - The present invention relates in general to a method for obtaining particulate calcium carbonate and activated carbon particles and methods for using same, and more particularly, to a method for obtaining activated carbon particles having an average particle size less than about 12 microns from a pulp mill. | 12-08-2011 |
20110300053 | Peptoids Useful for Catalyzing the Mineralization of Calcium Carbonate - The present invention provides for a bio-mimetic polymer capable of catalyzing CO | 12-08-2011 |
20120003144 | BONE TISSUE REGENERATION WITH CALCIFIED SUBSTANCE PRODUCED BY CULTURED CELLS - Disclosed is a material having a higher and direct bone-inducing ability, which is made of a calcified substance produced by a cell. Specifically disclosed is a material for regenerating a bone tissue, which comprises a calcified substance extracted from a cultured cell expressing a calcification capacity. In the material, the cultured cell expressing a calcification capacity may be a mammalian cell. In the material, the calcified substance may be extracted without sintering at a high temperature. Also disclosed is an artificial bone containing the material. | 01-05-2012 |
20120114548 | METHOD OF PRODUCING CARBONATE USING CARBON DIOXIDE MICROBUBBLES AND CARBONATE THEREOF - Disclosed herein is a method of producing carbonate, comprising the steps of: providing a water-containing solution including cations that are precipitated in the form of a salt after undergoing a precipitation reaction with carbonate ions; and generating carbon dioxide microbubbles having a diameter of 50 μm or less in the water-containing solution to induce the precipitation reaction between the cations and the carbonate ions. The method is advantageous in that the carbonate produced using the microbubble system disclosed in the method can be practically used as high-priced building materials, filler for paper manufacturing, etc. and can also be used in foods, medicines and the like depending on the purity thereof, so that it can be recovered in a high yield. Further, the method is advantageous in that carbon dioxide is consumed, and cations can be effectively removed from waste water, so that it is environmentally useful. | 05-10-2012 |
20120237433 | METHOD FOR SIZING OF MINERAL MATTER IN THE PRESENCE OF ADDITIVES CONTAINING GLYCEROL, PRODUCTS OBTAINED AND THEIR USES - The present invention concerns a method for sizing of mineral matter using a sizing aid additive comprising glycerol and/or at least one polyglycerol allowing the efficiency of air sizing to be increased, or involving a specific sizing energy which is reduced relative to an additive-free air sizing, whilst obtaining a sized mineral matter compatible with an application in an aqueous medium. | 09-20-2012 |
20130034489 | ELECTROCHEMICAL HYDROXIDE SYSTEM AND METHOD USING FINE MESH CATHODE - Provided herein are methods and systems including contacting an anode electrolyte with an anode; contacting a cathode electrolyte with a cathode where cathode is a fine mesh cathode; and applying voltage across the anode and the cathode. The methods and systems further may include treating hydroxide ions produced at the cathode with carbon from a source of carbon. | 02-07-2013 |
20130064753 | METHODS OF PRODUCING CARBONATE MINERALS AND APPARATUSES OF PRODUCING THE CARBONATE MINERALS - In a method of producing carbonate mineral, a first aqueous solution containing an alkaline earth metal ion extracted from a cation exchange medium by a cation exchange reaction and carbon dioxide are added to a second aqueous solution to form a carbonate mineral. | 03-14-2013 |
20130195747 | CALCIUM SULFATE AND CO2 SEQUESTRATION - Systems, methods, and compositions are provided related to utilizing gypsum for CO | 08-01-2013 |
20140072503 | FINE CRYSTAL PARTICLE PRODUCTION METHOD AND DEVICE HAVING EXCELLENT MIXING EFFICIENCY - An object of the present invention is to provide a fine crystal particle production method and device that are excellent in mixing efficiency. | 03-13-2014 |
20140147370 | METHOD FOR IMPROVING HANDLEABILITY OF CALCIUM CARBONATE CONTAINING MATERIALS - The present invention concerns a calcium carbonate containing material having increased bulk density at equal or improved flowability, and a method of producing such a material. The inventive process comprises the step of contacting a calcium carbonate containing mineral powder with a solution or emulsion or dispersion of a binder. | 05-29-2014 |
20140205530 | USE OF FORMULATIONS CONTAINING GLYCEROL AS A DRY GRINDING AID AGENT OF MINERAL MATTER - The invention consists in the use, as a dry grinding aid agent of a mineral matter chosen from among the dolomites, talc, titanium dioxide, alumina, kaolin and calcium carbonate, the function of which is to reduce the specific grinding energy and to increase the grinding capacity, of formulations containing glycerol. | 07-24-2014 |
20140271440 | HIGHLY REFLECTIVE MICROCRYSTALLINE/AMORPHOUS MATERIALS, AND METHODS FOR MAKING AND USING THE SAME - Compositions comprising highly reflective microcrystalline/amorphous materials are provided. In some instances, the highly reflective materials are microcrystalline or amorphous carbonate materials, which may include calcium and/or magnesium carbonate. In some instances, the materials are CO | 09-18-2014 |
20150010458 | PROCESS FOR THE PREPARATION OF AN AQUEOUS SOLUTION COMPRISING AT LEAST ONE EARTH ALKALI HYDROGEN CARBONATE AND ITS USE - The present invention refers to a process for the preparation of an aqueous solution comprising at least one earth alkali hydrogen carbonate and its uses. The process may be carried out in a reactor system comprising a tank ( | 01-08-2015 |
20150030523 | CARBON DIOXIDE CHEMICAL SEQUESTRATION FROM INDUSTRIAL EMISSIONS BY CARBONATION - Processes, methods, system and uses in relation to chemical sequestration of carbon dioxide from a carbon dioxide containing gas by carbonation of an alkaline earth metal containing material. The carbon dioxide containing gas is contacted with an aqueous slurry in a carbonation unit for carbonation of at least a portion of the alkaline earth metal to produce a carbon dioxide depleted gas and a carbonate loaded slurry which is substantially exempt of precipitated alkaline earth. metal carbonates, The carbonate loaded slurry is then separated into an aqueous phase and a solid phase; and the aqueous phase is supplied to a precipitation unit for precipitating alkaline earth metal carbonates. The carbonation stage may be performed at a carbonation temperature between about 10° C. and about 40° C. and a carbonation pressure between about 1 bar and about 20 bars. The solid phase may be recycled to the carbonation stage. | 01-29-2015 |
20150328645 | Method for separating calcium carbonate and gypsum - A method for separating a suspension containing gypsum granules and calcium carbonate granules and an aqueous solution, wherein the aqueous solution comprises at least one sodium salt, wherein the aqueous solution has a sodium ion concentration of at least 3 g/L and wherein such method comprises a step of separation by flotation using a collector for the gypsum granules, the collector comprising at least one heteropolar organic surfactant of formula RX, in which: R denotes a hydrocarbon-based chain comprising from 2 to 50 carbon atoms, and the hydrocarbon-based chain is chosen from: a saturated or unsaturated linear alkyl chain, a saturated or unsaturated branched alkyl chain; and X denotes at least one ionizable group selected from the group consisting of: a carboxylic group, a sulfonate group, a sulfate group, a phosphonate group, a phosphate group, and a hydroxamate group. | 11-19-2015 |
20150329365 | Method of Manufacturing Carbon-Rich Product and Co-Products - A method in which a parent hydrocarbon-rich material is processed so as to produce both a carbon-rich solid material that has a higher carbon to hydrogen ratio than that of the parent material and a carbon-deficient combustible gas that has a lower carbon to hydrogen ratio than the parent material. In the process, the material is activated by exposing it to a hot gas stream having elevated levels of one or both of carbon dioxide and water vapor. The combustible gas is combusted to produce heat. At least about 80% of the heat is used in one ore more endothermic steps that include drying coal or biomass. | 11-19-2015 |
20160121298 | CONTINUOUS CARBON SEQUESTRATION MATERIAL PRODUCTION METHODS AND SYSTEMS FOR PRACTICING THE SAME - Methods of producing solid CO | 05-05-2016 |
20160200587 | METHOD FOR MANUFACTURING HYDRATED MAGNESIUM CARBONATE | 07-14-2016 |
20160251231 | METHOD FOR SIZING OF MINERAL MATTER IN THE PRESENCE OF ADDITIVES CONTAINING GLYCEROL, PRODUCTS OBTAINED AND THEIR USES | 09-01-2016 |
423431000 | By reacting sulfur or halogen containing compound | 9 |
20080260615 | PROCESS FOR THE PREPARATION OF MICRON/NANO SIZED INORGANIC MATERIAL - The invention discloses methods for making micron/nano meter sized particles of various inorganic materials such as minerals/oxides/sulphides/metals/ceramics at a steadily expanding liquid-liquid interface populated by suitable surfactant molecules that spontaneously organize themselves into superstructures varying over large length-scales. This experiment is realized in a radial Hele-Shaw cell where the liquid-liquid interfacial growth rate and consequently time scales such as arrival of surfactant molecules to the interface, the hydrodynamic flow effect to modulate the material organization into super structures at the dynamic charged interface. | 10-23-2008 |
20080267854 | Process for Producing Carbonate Particles - To provide a process for producing carbonate particles, capable of efficient, easy formation of carbonate particles which have high crystallinity, less prone to agglomeration and offer orientation birefringence, particularly carbonate particles that are needle- or rod-shaped, and of controlling the particle size. In the process a metal ion source and a carbonate ion source are heated together in a liquid of 55° C. or higher for reaction to produce carbonate particles with an aspect ratio of greater than 1, wherein the metal ion source contains at least one metal ion selected from the group consisting of Sr | 10-30-2008 |
20090220405 | Systems and Methods for Generating Sulfuric Acid - Methods and systems for generating sulfuric acid ( | 09-03-2009 |
20120269714 | Method of Producing Calcite Capable of Controlling a Grain Size Thereof - Provided is a method of synthesizing high-purity calcite capable of controlling a grain size thereof, by reacting an aqueous calcium chloride solution with CO | 10-25-2012 |
20130202516 | Carbon Dioxide Sequestration Involving Two-Salt-Based Thermolytic Processes - The present invention relates to an energy efficient carbon dioxide sequestration processes whereby calcium silicate minerals and CO | 08-08-2013 |
20130287672 | Method for Increasing Efficiency in Mineral Carbonation Using Furnace Slag as Industrial Byproduct - Provided is a method for fixing carbon dioxide, the method includding: pulverizing furnace slag; mixing water and the furnace slag such that the furnace slag is present in a concentration of 5˜15 parts by weight based on 100 parts by weight of water; adding NaOH to the mixture; and supplying carbon dioxide to the decomposed mixture, and then carrying out a hydrothermal reaction, so that carbon dioxide can be stably fixed; the treatment of the furnace slag can lead to ecofriendly effects; and the use of the furnace slag can lead to production of carbonate minerals as the final product. | 10-31-2013 |
20130287673 | CAPTURE OF CARBON DIOXIDE - A method for capturing carbon dioxide comprising the steps of extracting mineral ions from a mineral source material to a mineral solution by reaction with a first ammonium salt; reacting the mineral solution with a CO | 10-31-2013 |
20150050206 | METHOD OF PREPARING CALCIUM CARBONATE USING DIRECT CARBONATION REACTION - Disclosed is a method of preparing calcium carbonate using a direct carbonation reaction. The method includes dissolving fuel gas desulfurization gypsum into an ammonia solution, performing a filtering process after making a carbonation reaction by feeding carbon dioxide into the ammonia solution in which the fuel gas desulfurization gypsum is dissolved, and performing a filtering process after precipitating the calcium carbonate by maintaining a filtered solution in a stationary state. | 02-19-2015 |
20180022614 | A CONTROLLED PROCESS FOR PRECIPITATING CALCIUM CARBONATE | 01-25-2018 |
423432000 | By reacting oxide or hydroxide of the metal | 21 |
20080241048 | Carbonates and Method for Producing the Same - The present invention provides a method for producing carbonates, which includes at least adding an aqueous solution containing a carbonate source into an alcoholic solution containing a metal ion source, wherein an alkaline chemical is added when the carbonate source is reacted with the metal ion source. | 10-02-2008 |
20080247937 | Carbonate and method for producing the same - To provide a method for producing a carbonate, including: growing seed crystals, wherein the seed crystals are grown in a reaction solution containing at least urea. An aspect in which the seed crystals are strontium carbonate particles, an aspect in which the reaction solution contains a metal ion source and the metal ion source is a hydroxide of strontium, and the like are favorable. | 10-09-2008 |
20090028774 | CARBONATOR AND METHOD FOR MAKING CALCIUM CARBONATE - The present invention provides a method for making precipitated calcium carbonate (PCC) which compensates for the slow reaction time of carbonation in a manner which reduces or eliminates the undesirable use and expense of added equipment and processes of previously known methods. The method of the invention involves the generation of multiple streams (preferably at least twenty-five streams) of carbon dioxide which are co-currently introduced to a flow of calcium hydroxide slurry (lime milk). By use of multiple gas streams an intimate mixing of carbon dioxide with the slurry is achieved which compensates for the slow reaction time of carbonation while reducing or eliminating the need for equipment and processes related to recycling, batch operation, serial operation, and long reactor length. An additional benefit of using multiple gas streams in co-current flow is a lower concentration gradient of PCC formed therein facilitating the formation of smaller particles. Furthermore, during the generation of multiple streams of carbon dioxide, the method of the present invention generates streams of carbon dioxide bubbles having a small diameter size which cumulatively contribute to the aforementioned benefits of the invention resulting from the intimate mixing of carbon dioxide and calcium hydroxide slurry. | 01-29-2009 |
20090081112 | PROCESS AND APPARATUS FOR PRODUCING SUSPENSIONS OF SOLID MATTER - Method for producing nanosized calcium hydroxide crystals or particles, according to which method the calcium oxide-bearing initial material is brought into contact with carbon dioxide in the aqueous phase. Calcium carbonate crystals or particles are produced in a mixture, the pH of which is below 7. Using the present invention, it is possible to combine the two stages of producing CaCO | 03-26-2009 |
20100074828 | Method and Apparatus for the Removal of Carbon Dioxide from a Gas Stream - The invention provides methods and apparatuses for removing carbon dioxide from a gas stream. In particular, the invention provides methods and apparatuses for absorbing carbon dioxide from a coal-fired boiler flue gas stream using an absorbing solution and for regeneration of an alkaline component used in the absorbing solution. In one embodiment, the invention provides a method for removing carbon dioxide from a gas stream by contacting a gas stream containing carbon dioxide with an alkaline liquid stream; absorbing at least a portion of the carbon dioxide into the alkaline liquid stream to produce absorbed carbon dioxide; and catalyzing a reaction of the absorbed carbon dioxide to a form of carbonate. | 03-25-2010 |
20100135891 | PROCESS FOR PRODUCTION OF PCC - The present invention relates to a process of preparing precipitated calcium carbonate (PCC) in a low energy intensity reactor in such a manner that the amount of solids in the PCC product can be raised to 35% or more without performing a dewatering step. The process comprises performing in parallel and in two or more separate reaction vessel the steps of contacting calcium hydroxide with a gas comprising carbon dioxide to allow formation of calcium carbonate, and adding calcium oxide, lime or dry calcium hydroxide or a combination of any of the three to a part of the resulting mixture of calcium hydroxide and calcium carbonate. The invention further provides a specialized reactor system as well as the use of this reactor system in the manufacture of PCC. | 06-03-2010 |
20110135560 | USE OF A WEAKLY IONIC ACRYLIC POLYMER IN THE SYNTHESIS OF PRECIPITATED CALCIUM CARBONATE - The invention consists in the use, in a method to manufacture a mineral matter, notably a precipitated calcium carbonate, of a polymer consisting of at least one vinylic monomer chosen from among acrylic or methacrylic acid, acrylamide, methacrylamide or a cationic monomer, or their blends, and at least one non-ionic monomer. The use of this polymer enables the carbonation time of the PCC to be reduced, without however impairing its crystallographic structure and its granulometric characteristics. | 06-09-2011 |
20110158890 | PROCESS TO PREPARE PRECIPITATED CALCIUM CARBONATE IMPLEMENTING LOW CHARGE ACRYLATE A/O MALEINATE-CONTAINING POLYMER - Process to prepare a precipitated calcium carbonate (PCC) comprising the following steps: (i) providing CaO, which is optionally partially or fully slaked (hereafter “calcium source”); ({umlaut over (ν)}) providing a CO | 06-30-2011 |
20110256048 | INTEGRATED CHEMICAL PROCESS - A process for converting carbon dioxide into solid material, which process comprises the steps of: (a) direct thermal activation of magnesium silicate hydroxide mineral feedstock by combustion of fuel to produce an activated feedstock; (b) separation from the activated feedstock of metal oxides at least substantially excluding magnesium oxide and magnesium silicate to produce a residual activated feedstock; (c) before or after said separation step suspension of the activated feedstock in a solvent to form a slurry; and (d) contacting the slurry of residual activated feedstock with carbon dioxide to convert the carbon dioxide into magnesium carbonate. | 10-20-2011 |
20120058042 | PHYSICAL SEPARATION AND SEQUESTRATION OF CARBON DIOXIDE FROM THE EXHAUST GASES OF FOSSIL FUEL COMBUSTION - Methods are provided for physically removing all the carbon dioxide from the combustion products of solid, liquid, and gaseous fossil fuels. The combustors operate without excess air to maximize the carbon dioxide at the exhaust, which is compressed with the nitrogen and mixed with pressurized water to dissolve the carbon dioxide in a chamber from which the nitrogen gas is removed. The solution is drained into a second lower pressure chamber from which the carbon dioxide re-evolves as a gas, which is then pressurized for sequestration in limestone formations as calcium bicarbonate. The water is recycled to repeat the separation process, and depressurization of the two gases recovers most of the compression energy. | 03-08-2012 |
20120128571 | CARBONATION OF METAL SILICATES FOR LONG-TERM CO2 SEQUESTRATION - In a preferred embodiment, the invention relates to a process of sequestering carbon dioxide. The process comprises the steps of: (a) reacting a metal silicate with a caustic alkali-metal hydroxide to produce a hydroxide of the metal formerly contained in the silicate; (b) reacting carbon dioxide with at least one of a caustic alkali-metal hydroxide and an alkali-metal silicate to produce at least one of an alkali-metal carbonate and an alkali-metal bicarbonate; and (c) reacting the metal hydroxide product of step (a) with at least one of the alkali-metal carbonate and the alkali-metal bicarbonate produced in step (b) to produce a carbonate of the metal formerly contained in the metal silicate of step (a). | 05-24-2012 |
20120128572 | METHOD OF PRODUCING CALCIUM CARBONATE - A method of producing calcium carbonate. In the method a calcium oxide material is contacted in aqueous phase with carbon dioxide in a plurality of carbonation units. According to the invention, the calcium oxide material is carbonated in a first carbonation unit in an aqueous slurry at a pH in excess of 11.0 in order to produce a calcium carbonate into the aqueous slurry, from the first carbonation unit is withdrawn an effluent formed by an aqueous slurry containing calcium carbonate and calcium hydroxide, and the calcium hydroxide of the withdrawn effluent is then carbonated in a second carbonation unit to produce a calcium carbonate slurry having a pH of less than 6.9. The method allows for the production of both monodisperse particles with a narrow molecular weight distripution and multidisperse particles with a broad molecular weight distribution. | 05-24-2012 |
20120189529 | CARBON DIOXIDE GAS PROCESSING APPARATUS AND CARBON DIOXIDE GAS PROCESSING METHOD - Disclosed is a carbon dioxide gas processing apparatus including an oxidization vessel for producing a magnesium oxide by oxidizing magnesium-containing powder in an atmosphere of a gas such as a carbon dioxide gas that contains oxygen as a constituent element thereof, a carbonate production tank that reserves water or a water solution therein and that introduces the magnesium containing oxygen as a constituent element produced in the oxidization vessel, and a carbon dioxide gas supplying means for supplying carbon dioxide gas to the carbonate production tank. | 07-26-2012 |
20130129601 | LIME CAUSTICIZATION PRODUCT BRIGHTNESS IMPROVEMENT VIA PRE-SLAKING - A method for obtaining particulate calcium carbonate exhibiting improved brightness and color and having uniformity of size such that when the particles are formed in the causticization process in a kraft pulp mill, the time required to separate the particles from liquors in which they are suspended is minimized and the amount of liquor recovered is maximized, with minimal dilution by water used for washing. The method includes the steps of a) slaking calcium oxide in water or an alkaline liquor containing as dissolved species predominantly sodium hydroxide; b) mixing the slaked lime with green liquor from a kraft pulping process to complete a causticization reaction that produces white liquor and lime mud; c) separating the lime mud from the white liquor; and d) milling a portion of the lime mud for use as a white mineral pigment in applications where such pigments are typically used. | 05-23-2013 |
20130164206 | CALCIUM CARBONATE HAVING A SURFACE CHARGE, THE PREPARING PROCESS THEREOF AND FILLER FOR PRODUCING A PAPER USING THE SAME - The present invention relates to a calcium carbonate having a surface charge, the preparing process thereof and filler for producing a paper using the same. The present invention provides the process of preparing a calcium carbonate having a surface charge, characterized in that it comprises the following steps of: preparing a solution mixture of one or more monomer selected from the group consisting of calcium hydroxide, acrylic acid, acrylamide, or [2-(acryloyloxy)ethyl]-trimethylammonium chloride; removing dissolved gases such as oxygen and carbon dioxide in the said solution by injecting nitrogen (N | 06-27-2013 |
20130195748 | PROCESS FOR OBTAINING PRECIPITATED CALCIUM CARBONATE - The present invention provides a process for preparing a precipitated calcium carbonate product. The process comprises the steps of preparing an aqueous suspension of precipitated calcium carbonate seeds by carbonating a suspension of Ca(OH) | 08-01-2013 |
20130216468 | METHOD AND APPARATUS FOR IN-LINE PRODUCTION OF MILK OF LIME INTO AN IN-LINE PRODUCTION PROCESS OF PCC ARRANGED IN CONNECTION WITH A FIBROUS WEB MACHINE - A method and apparatus for in-line production of milk of lime into an in-line production process of PCC arranged in connection with a fibrous web machine. In the solution, lime is slaked in a slaking apparatus at a temperature of at least 80 degrees. The produced milk of lime is cleaned by separating excessively large calcium hydroxide particles immediately prior to introducing the milk of lime into the production process of PCC. The milk of lime is introduced into the in-line production process of PCC located in the production line of the end or intermediate product of the fibrous web machine. | 08-22-2013 |
20140065052 | PROCESS FOR MANUFACTURING NEEDLE-SHAPED STRONTIUM CARBONATE PARTICLES - Acicular strontium carbonate particles are manufactured by introducing gaseous carbon dioxide into an aqueous solution or suspension of strontium hydroxide having a concentration of 1 to 20 wt. %, at a flow rate of 0.5 to 200 mL/min., relative to one gram of the strontium hydroxide, while stirring the solution or suspension in the presence of a dicarboxylic acid, in which the dicarboxylic acid comprises a divalent linear hydrocarbon group having one to four carbon atoms and carboxyl group bonded to each terminals, with the proviso that the linear hydrocarbon group may be substituted with one or more C | 03-06-2014 |
20140147371 | CARBONATION OF METAL SILICATES FOR LONG-TERM CO2 SEQUESTRATION - In a preferred embodiment, the invention relates to a process of sequestering carbon dioxide. The process comprises the steps of: (a) reacting a metal silicate with a caustic alkali-metal hydroxide to produce a hydroxide of the metal formerly contained in the silicate; (b) reacting carbon dioxide with at least one of a caustic alkali-metal hydroxide and an alkali-metal silicate to produce at least one of an alkali-metal carbonate and an alkali-metal bicarbonate; and (c) reacting the metal hydroxide product of step (a) with at least one of the alkali-metal carbonate and the alkali-metal bicarbonate produced in step (b) to produce a carbonate of the metal formerly contained in the metal silicate of step (a). | 05-29-2014 |
20150056124 | PROCESS FOR PREPARING SCALENOHEDRAL PRECIPITATED CALCIUM CARBONATE - The present invention provides a process for preparing a precipitated calcium carbonate product. The process comprises the steps of preparing slaking quick time to obtain slaked lime; and subjecting the slaked lime, without agitation, without prior cooling in a heat exchanger, and in the absence of any additives, to carbonation with carbon dioxide as to produce PCC. The newly prepared product develops better performance thanks to improved resistance during processing. | 02-26-2015 |
20160167977 | PROCESS FOR OBTAINING PRECIPITATED CALCIUM CARBONATE | 06-16-2016 |