Class / Patent application number | Description | Number of patent applications / Date published |
423635000 | Alkaline earth metal (Mg, Ca, Sr, or Ba) | 19 |
423636000 | Process of manufacturing | 19 |
20090214416 | PROCESS FOR PREPARING A METAL HYDROXIDE - The invention provides a process for preparing a metal hydroxide comprising the steps of: (a) providing particles of a metal silicate; (b) mixing the particles with a mineral acid solution to obtain a slurry which comprises precipitated silica; (c) separating the precipitated silica from the slurry to obtain a remaining solution; (d) increasing the pH of the remaining solution to such an extent that a metal hydroxide is formed; (e) separating the metal hydroxide so obtained from the remaining solution; and (f) adding to the remaining solution obtained in step (e) an acid solution, thereby forming a salt containing solution, or (g) removing at least part of the base added in step (d) from the remaining solution obtained in step (e), thereby forming a salt containing solution. | 08-27-2009 |
20090220411 | Method for producing activated lime for removal of acid gases from a combustion gas - An activated lime for use in removing acid gases from a combustion gas stream is produced by thermally decomposing calcium hydroxide to calcium oxide through contact or the calcium hydroxide with a heated gas stream at a temperature or between 750-950° F. for a time sufficient to produce a calcium oxide having a specific surface area of between 30-48 square meters per gram, and collecting the product so produced. | 09-03-2009 |
20100196258 | METHOD TO PREVENT BUILD-UP OF LIMESTONE IN A LIME SLAKER THAT IS USED FOR BATCHWISE SLAKING OF BURNT LIME - A method to prevent build-up of limestone in a slaker that is used for batchwise slaking of burnt lime is described, in which lime slurry is produced with a greater degree of fineness and prolonged sedimentation time, where for immediate cleansing of the slaker before next slaking, after said calibration of the load cell aggregate, a number of valves are opened for given time periods for addition of flushing water to respective nozzles, in that flushing water is supplied sequentially via each valve to associated nozzle(s), until a predetermined amount of flushing water is reached in the slaker. | 08-05-2010 |
20130224103 | SYSTEM FOR CALCINING ACTIVE LIME WITH A PRECALCINING FURNACE AND METHOD USING THE SAME - The invention provides a system for calcining active lime, including a precalcining furnace for receiving limestone materials to be calcined and precalcining the limestone materials, and a rotary kiln for receiving the materials containing precalcined product from the precalcining furnace, outputting the formed active lime, and at the same time supplying a first flue gas to the precalcining furnace. The calcining system further includes a precalcining furnace combustion device, which generates a second flue gas and supplies it to the precalcining furnace, such that the limestone materials are precalcined in the precalcining furnace under the action of the first flue gas and the second flue gas. In this way, the precalcining rate of the limestone materials in the precalcining furnace is significantly improved. Since the heat exchange in the precalcining furnace is mainly in the form of convective heat exchange having a high heat efficiency, the heat exchange efficiency of the whole system is improved, and thus the heat consumption of the system is reduced. | 08-29-2013 |
20130236390 | Method For Batchwise Slaking Of Burnt Lime In A Slaker - A method is described for batchwise slaking of burnt lime in a slaker, in which a lime slurry is produced with a greater degree of fineness and prolonged sedimentation time, comprising the following processing steps:
| 09-12-2013 |
20140134097 | MAGNESIUM OXIDE POWDER HAVING EXCELLENT DISPERSIBILITY AND METHOD FOR PRODUCING THE SAME - A magnesium oxide powder having excellent dispersibility and a small average particle diameter as well as a uniform particle diameter and containing no very small size particles is obtained. A magnesium oxide powder which is particles, wherein the magnesium oxide powder has a BET specific surface area of 5 m | 05-15-2014 |
423637000 | Utilizing carbonate as reactant | 4 |
20100086476 | METHOD AND APPARATUS FOR TREATING LIME MUD - A method for feeding lime mud into a lime kiln including a rotary kiln shell having an interior between a first end wall and a second end wall, the method including: feeding the lime mud into a flue gas flow in the interior of the rotary kiln shell or in close proximity to the shell to pretreat the lime mud; separating the pretreated lime mud from the flue gas flow; conveying the separated lime mud into the lime kiln, and calcining the separated lime mud in the lime kiln. | 04-08-2010 |
20100092379 | APPARATUS AND METHOD FOR USE IN CALCINATION - A calcining system includes a calcining chamber of a sufficient length to effect a desired level of calcination of solid particles. A hot gas source to communicate hot gases within the calcining chamber. An entrainment gas source operable to communicate an entrainment gas to transport the solid particles into the calcining chamber to calcine the solid particles to form calcined solid particles. | 04-15-2010 |
20110070150 | Device for Selectively Dispensing Limestone for a Regenerating Oven and Process for Selectively Loading Limestone in a Regenerating Oven Using Such Device - A selective dispensing device ( | 03-24-2011 |
20110195017 | PROCESS FOR THE PRODUCTION OF HIGH PURITY MAGNESIUM HYDROXIDE - This invention refers to a novel process for obtaining high purity magnesium hydroxide from a solid starting material containing magnesium in the form of, and/or combined with, carbonates, oxides and/or hydroxides, either natural or synthetic. The process comprises leaching the starting material to dissolve the magnesium; the solution is treated with alkali to precipitate the high purity magnesium hydroxide, and the remaining mother liquor is fed to a regeneration step of both the alkali used in the precipitation of high purity magnesium hydroxide, and the acid for leaching. The process of the invention is characterized by recycling reactants (acid and alkali) regenerated in the same process. | 08-11-2011 |
423640000 | By hydrating lime | 9 |
20080233044 | Method and Apparatus For Hydration of a Particulate or Pulverulent Material Containing Cao, Hydrated Product, and Use of Hydrated Product - Described is a method as well as an apparatus for hydration of a particulate or pulverulent material containing CaO. The method is peculiar in that water is added in a quantity which will ensure that the partial pressure P | 09-25-2008 |
20090246117 | Method of forming a hydrated lime for acid gas removal from flue gas - A hydrated lime, especially suited for removal of acid gases, such as SO | 10-01-2009 |
20110064646 | METHOD FOR CONTINUOUSLY AND PROPORTIONAL ADDING OF LIME - This disclosure relates to a method for continuously and proportional adding of lime to a water flow through in a plant, wherein a number of slakers are used for batchwise slaking of burnt lime, and wherein lime slurry with a greater degree of fineness and prolonged sedimentation time is produced. A first slaker empties completely slaked and diluted lime slurry after the weight principle proportional to the water flow through of the plant, until a predetermined mass of slurry weight is left, which is used for mixing with a next batch. A second slaker, which is ready for its emptying sequence, starts emptying completely slaked and diluted lime slurry after the weight principle proportional to the water flow through of the plant, when the first slaker has finished emptying, until a predetermined mass of slurry weight is left, which is used for mixing with a next batch. After flushing with flushing water via valves of respective slakers, production of a new batch is started, this is ready for its emptying sequence when the active slaker has finished its emptying. | 03-17-2011 |
20110150755 | Method and Apparatus for Hydrating Lime - In a process for the hydration of a material containing CaO, the material is contacted with water near the bottom of a vertical gas suspension column to thereby at least partially hydrate the material. The material is thereafter transported upward through and out of the vertical gas suspension column in an entraining gas that enters the vertical gas suspension column near its bottom. | 06-23-2011 |
20120328510 | Process and Apparatus for Slaking Lime and Dissolving Scale - Process and apparatus is disclosed for providing a chemical reaction between calcium oxide containing grit particles to produce calcium hydroxide and heat, capturing the heat of hydration and using it to preheat water initially at ambient temperature, to rise to an elevated temperature to increase the amount of lime present in the water to a supersaturated lime suspension level, with the chemical reaction running to completion, followed by cooling. Heat from a water jacket may be used to raise the temperature in the lime slaker. A process and apparatus is also provided for dissolving scale on internal surfaces of a lime slaker, a lime aging tank, grit separation device and piping and dosing sub-systems, by adding acid into the system with rinse water. A pressurized delivery system that is substantially closed to atmosphere delivers treating dosing under sufficient pressure conditions to maintain a relatively constant back pressure, by means of valving. | 12-27-2012 |
20130129605 | Lime Slaking Process - A lime slaking process is provided, whereby lime is delivered from a silo into a slaking vessel, and water is likewise delivered from one or more sources, into the slaking vessel, such that unreacted lime will go through a hydration process in an exothermic reaction, and wherein the temperature of the lime being slaked in the slaking vessel is monitored and controlled via a computer that responds to the monitored temperature of lime being slaked, to add additional water and/or lime, as desired. The delivery of lime from a lime silo to the slaking vessel is via a volumetric feeding apparatus. Following the slaking process, the reacted lime and water, in the form of a slurry may be delivered to an aging tank, and subsequently to a gravity operated grit classifier. Water from the slurry may be drawn off for use at one or more dosing stations. | 05-23-2013 |
20130129606 | METHOD FOR TEMPERATURE CONTROL IN A SLAKER - Method for batch wise slaking of burnt lime in a slaker, in which a lime slurry is produced with a great degree of fineness and long sedimentation time, comprising the following steps: the regulation of the slaking temperature is carried out in either of two steps—at incoming water temperatures between 0-10° C. a predetermined amount of the finished slurry is emptied out—at incoming water temperatures between 10-20° C. a predetermined amount of flushing water or diluting water is added. | 05-23-2013 |
20130236391 | MANUFACTURING FACILITY FOR QUICKLIME, AND MANUFACTURING FACILITY AND MANUFACTURING PROCESS FOR SLAKED LIME - A manufacturing facility for quicklime is provided, which can manufacture highly active quicklime by a simple manufacturing facility, and which can also separate and recover, in a high concentration, CO | 09-12-2013 |
20160145116 | PREPARATION METHOD AND DEVICE FOR EFFICIENTLY PREPARING MAGNESIUM HYDROXIDE - The present invention relates to a device for efficiently preparing magnesium hydroxide, comprising a material mixing tank, a pressure control linkage unit I, a reactor, a pressure control linkage unit II, a condenser, a three-way valve, a material storage tank, a pressure control linkage unit III and a vapor generator. The beneficial effect of the present invention is that magnesium hydroxide slurry can be prepared quickly and efficiently. | 05-26-2016 |