Class / Patent application number | Description | Number of patent applications / Date published |
210757000 | By chemical reduction | 28 |
20080230486 | METHOD AND APPARATUS FOR LIQUID PURIFICATION - A method for modifying contaminants in a liquid comprising a reaction chamber where the liquid interacts with an ionization reaction material which causes contaminants to reduce or oxidize into harmless compounds. | 09-25-2008 |
20080257833 | METHOD AND APPARATUS FOR LIQUID PURIFICATION - A means for modifying contaminants in a liquid comprising a reaction chamber where the liquid interacts with an ionization reaction material which causes contaminants to reduce or oxidize into harmless compounds. | 10-23-2008 |
20080257834 | Harmful material remediating agent and method for remediating harmful material using the same - The present invention relates to a harmful material remediating agent comprising a metal oxide and a reducing material, and it can remediate environmental. pollutants such as harmful organic compounds and nitrate or nitrite nitrogen-containing compounds efficiently and at low cost. | 10-23-2008 |
20080302736 | BIMETALLIC CATALYST FOR THE TREATMENT OF WATER CONTAINING NITRATES - A catalyst which, by means of a reduction reaction at ambient temperature, permits the elimination of nitrates and nitrites in waters. The catalyst comprises a combination of a noble metal and a non-noble metal supported on or incorporated into the structure of a support which, in elemental and anhydrous form, has the formula XYMgAl, in which X is at least one noble metal, Y is at least one non-noble metal, Mg is magnesium and Al is aluminium, the Mg and Al preferably forming the structure of a hydrotalcite or a mixed oxide deriving from a hydrotalcite. | 12-11-2008 |
20090145858 | METHOD FOR TREATING WASTE WATER CONTAINING NITRATE ION - A method for treating waste water containing nitrate ion which comprises supplying raw waste water from a tube ( | 06-11-2009 |
20090159539 | Catalytically Treating Water Contaminated With Halogenated Organic Compounds - Catalytically treating groundwater ( | 06-25-2009 |
20090266771 | TITANIUM OXIDE AND ALUMINA ALKALI METAL COMPOSITIONS - The invention relates to Group 1 metal/porous metal oxide compositions comprising porous metal oxide selected from porous titanium oxide and porous alumina and an alkali metal or an alkali metal alloy. The compositions of the inventions are described as Stage 0 and I materials. These materials differ in their preparation and chemical reactivity. Each successive stage may be prepared directly using the methods described below or from an earlier stage material. Stage 0 materials may, for example, be prepared using liquid alloys of Na and K which are rapidly absorbed by porous metal oxide under isothermal conditions, preferably at or just above room temperature, to form loose black powders that retain much of the reducing ability of the parent metals. When the low melting Group 1 metals are absorbed into the porous metal oxide at about 150° C., an exothermic reaction produces Stage I material, loose black powders that are stable in dry air. Further heating forms higher stage materials of unknown composition. It is believed that Stage I higher materials represent reductions of the porous metal oxide after absorption of the Group 1 metal. Preferred Group 1 metal/porous metal oxide compositions of the invention are those containing sodium, potassium, or sodium-potassium alloys with sodium and sodium-potassium alloys being most preferred. Each stage of the Group 1 metal/porous metal oxide composition of the invention may be used as a reducing agent reacting with a number of reducible organic materials in the same manner known for alkali metals and their alloys. | 10-29-2009 |
20090289016 | REDUCING WATER PURIFICATION MATERIAL, METHOD FOR PRODUCING REDUCING WATER PURIFICATION MATERIAL, METHOD FOR TREATING WASTEWATER, AND WASTEWATER TREATMENT APPARATUS - A reducing water purification material having a reducing iron-based precipitate selected from green rust, iron ferrite, reducing iron hydroxide, and a mixture thereof. A wastewater treatment process having steps of adding a reducing iron compound to wastewater, leading the wastewater to which the reducing iron compound is added to a reaction tank and forming a precipitate, separating the formed precipitate by a solid-liquid separation to obtain a sludge, and alkalinizing all or a portion of the separated sludge to form an alkaline sludge followed by returning to the reaction tank, wherein in the precipitation step, the wastewater to which the reducing iron compound is added and the alkaline sludge are mixed and are allowed to react in a non-oxidizing atmosphere under alkaline condition to form a reducing iron compound precipitate as the precipitate, thereby incorporating contaminants in the precipitate to remove the contaminants from the wastewater. | 11-26-2009 |
20100126945 | Reactor for Reductive Conversion Reactions Using Palladized Bacterial Cellulose - A process for affecting reductive conversion reactions in a reactor using the palladized bacterial cellulose immobilized on a support for reductive conversion reactions in a reactor. | 05-27-2010 |
20100147776 | MAGNESIUM THIOSULFATE AS CHLORINE QUENCHER AND SCRUBBER - In one aspect, ozone is quenched from a water stream, such as a drinking water or wastewater stream being treated with ozone, by contacting the stream with magnesium thiosulfate. In another aspect, a method of scrubbing ozone from a gaseous stream comprises contacting the gaseous stream with magnesium thiosulfate. In an alternative embodiment, chlorine is quenched from a water stream by contacting the stream with magnesium thiosulfate or potassium thiosulfate. In yet another aspect, a method of scrubbing chlorine from a gaseous stream comprises contacting the stream with magnesium thiosulfate or potassium thiosulfate. In another embodiment, a thiosulfate, such as magnesium thiosulfate, calcium thiosulfate, potassium thiosulfate, or sodium thiosulfate, is provided on an air filter for scrubbing ozone or chlorine from gaseous streams. | 06-17-2010 |
20100181262 | CHEMICAL PROCESS - A process for the removal of azide ions from aqueous liquids at alkaline pH by alkali-soluble metals and catalyst or by hydrogen and catalyst. | 07-22-2010 |
20100243579 | PROCESS FOR PRODUCING A NANOSCALE ZERO-VALENT METAL - This invention describes a process for producing a nanoscale zero-valent metal, including reduction of a metal ion solution with a dithionite compound, wherein the reduction is carried out under alkaline conditions under substantially an inert atmosphere. A nanoscale zero-valent metal obtainable by this process, and having a new crystalline form, is also described. The nanoscale zero-valent metal produced by the process of the invention is preferably iron, and is advantageously used for the remediation of contaminated water. | 09-30-2010 |
20100282690 | SIMULTANEOUS REDUCTION/OXIDATION PROCESS FOR DESTROYING AN ORGANIC SOLVENT - This invention relates to decontaminating water containing organic compounds by treating the contaminated water by adding solid phase zero valent iron (ZVI) and persulfate to destroy organic contaminants in water. | 11-11-2010 |
20110120958 | Wastewater Treatment - A method for treating wastewater treats wastewater. In an embodiment, the method for treating wastewater includes treating wastewater comprising a chemical oxygen demand. The method includes dissolving an iron compound in the wastewater. The method also includes adjusting the pH of the wastewater to reduce the chemical oxygen demand of the wastewater. | 05-26-2011 |
20110309033 | METHOD FOR TREATING WASTEWATERS - The invention relates to a method for treating wastewater containing nitroaromatics and nitrohydroxyaromatics, as for example arises in the production of nitroaromatics or in the production of nitrohydroxyaromatics, by a two-stage method consisting of pre-reduction and wet oxidation. | 12-22-2011 |
20120111802 | ACTIVATED CARBON CLOTH-SUPPORTED BIMETALLIC PD-CU CATALYSTS FOR NITRATE REMOVAL FROM WATER - An activated carbon cloth-supported bimetallic Pd—Cu nanocatalyst is disclosed comprising about 1 wt % Pd and about 0.35-0.45 wt % Cu and having a surface Cu/Pd metal ratio of about 8-10 m | 05-10-2012 |
20120211440 | Ballast water treatment method - A method for treating ballast water with sulfurous acid to kill invasive species and remove oxygen from the ballast water to preserve hulls from rusting. | 08-23-2012 |
20120285899 | NANOPOLYMETALIC REDUCING AGENT FILLER - The present invention provides a nanopolymetallic reducing agent filler comprising 20%-70% iron powder, 10%-30% tourmaline power, 2%-15% copper power, 3%-10% bamboo charcoal powder, 2%-15% kaoline, 2%-15% magnesite powder, 2%-15% pyrolusite powder, and 10%-30% zeolite powder. All percentages described above are by weight. A process of forming the nanopolymetallic reducing agent filler is also provided, including grinding and ball milling raw materials of each component respectively into powder particles of 10 nm-100 μm, which are then mixed uniformly by weight percentage and granulated to form a granular mixture, and sintering the granular mixture at high temperature or cold pressing it into a granular filler. | 11-15-2012 |
20130020265 | REDUCTION TREATMENT METHOD FOR BALLAST WATER - The present invention relates to a method for reduce treating ballast water which has been subjected to a biocidal treatment with a chlorine-based oxidizing agent or an oxygen-based oxidizing agent, by using a tablet or pellet of sodium sulfite. | 01-24-2013 |
20130180933 | HYDROPHOBICALLY MODIFIED POLYAMINE SCALE INHIBITORS - Hydrophobically modified Si-containing polyamines are useful for treating scale in industrial process streams. Preferred hydrophobically modified Si-containing polyamines are particularly useful for treating aluminosilicate scale in difficult-to-treat industrial process streams, such as in the Bayer alumina process streams, nuclear waste streams and kraft paper mill effluent streams. | 07-18-2013 |
20130233808 | Method for Passive Mixing - An improved method that requires no electricity or moving parts to increase lime utilization where pebble quicklime (CaO) and/or hydrated lime (Ca(OH) | 09-12-2013 |
20140054243 | SYSTEM FOR TREATING BALLAST WATER IN BALLAST TANKS - A system for treating ballast water in ballast tanks onboard vessels is provided. The system comprises one or more ballast tanks, a circulation pump circulating or recirculating, via a tubing, ballast water from and to the one or more ballast tanks, a nitrogen and/or carbon dioxide generator connected to the tubing on the delivery side of the recirculation pump in such a manner that nitrogen and/or carbon dioxide can be supplied to the ballast water, and one or more nozzle heads functionally connected to the tubing and arranged in one or more ballast tanks. The one or more nozzle heads comprises at least one nozzle for injecting the gas-containing water into the ballast tanks. At least one nozzle is configured for powered rotation about a first and a second axis which is perpendicular or not perpendicular to the first axis to the effect that a three-dimensional mixer pattern is produced. | 02-27-2014 |
20140263096 | PROCESS FOR CHEMICAL DESTRUCTION OF COMPOUNDS FROM AMINE-BASED CARBON CAPTURE - The present invention provides a liquid handling system comprising a reactor, wherein the reactor is structured such that it contains a gaseous phase and an aqueous phase, both phases being in contact with a heterogeneous hydrogenation catalyst immobilised or suspended within the aqueous phase, wherein the gaseous phase comprises hydrogen and wherein the aqueous phase comprises (i) a solution of amines; and (ii) nitrosamine and/or nitramine compounds resulting from amine-based gas sweetening processes. The invention further relates to a process for in-situ destruction of compounds in the aqueous phase from a scrubber system, wherein the process comprises contacting the aqueous phase with a gas phase comprising hydrogen and a heterogeneous catalyst, wherein the aqueous phase comprises (i) a solution of amines; and (ii) nitrosamine and/or nitramine compounds resulting from amine-based gas sweetening. | 09-18-2014 |
20140305882 | FILTRATION MEDIUM COMPRISING A METAL-CONTAINING PARTICULATE - Described herein is a liquid filtration device is disclosed comprising a fluid conduit fluidly connecting a fluid inlet to a fluid outlet; and a water filtration medium disposed in the fluid conduit; the water filter medium comprising a metal-containing particulate, wherein the metal-containing particulate comprises a thermolysis product of a metal carboxylate; and methods of removing chloramines from aqueous solutions. | 10-16-2014 |
20140353258 | METHOD FOR REDUCING CHROMIUM - The present invention relates to method and a system of reducing chromium (VI) from a chromium bearing solution. The reduction of the chromium (VI) is achieved by contacting the chromium bearing solution which comprises chromium (VI) ions in an aqueous solution with iron fibres in an exchange mass under oxidation-reduction potential conditions at a pH of at least 2.5, with entry of iron ions into solution in the aqueous solution and reduction of the chromium (VI) ions to chromium (III) recovered in the exchange mass. A solution substantially free of chromium (VI) ions and total chromium is produced and discharged from the exchange mass. | 12-04-2014 |
20160052808 | ZERO VALENT IRON SYSTEMS AND METHODS FOR TREATMENT OF CONTAMINATED WASTEWATER - Hybrid zero-valent iron systems and methods for treating a fluid containing a contaminant that removes or reduces the concentration of contaminants, such as toxic metals, metalloids, oxyanions, and dissolved silica. | 02-25-2016 |
20160175787 | STATIC MIXER | 06-23-2016 |
20170233662 | SATURATOR AND METHOD FOR REUSING WATER FROM A FISCHER-TROPSCH REACTOR | 08-17-2017 |