| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 210719000 | Including chemical reduction | 18 |
| 20090236290 | WATER TREATMENT DEVICE COMPRISING A REACTOR AND MEANS FOR INJECTING A REAGENT INTO THE REACTOR MOUNTED ON MOBILE SUPPORTING MEANS - The invention concerns a water treatment device comprising a reactor ( | 09-24-2009 |
| 20090242489 | ELEMENT REMOVAL PROCESS AND APPARATUS - A process and apparatus for removing elements is described herein. | 10-01-2009 |
| 20090294376 | Method for depolluting aqueous media containing organic pollutants - The present invention relates to a process for decontaminating aqueous media comprising organic contaminants. | 12-03-2009 |
| 20090308816 | IN-SITU PRECIPITATION THROUGH MICROBIALLY MEDIATED IRON DISTRIBUTION AND IRON OXYHYDROXIDE FORMATION - The invention provides methods of precipitating metals from groundwater in a form that will remain stable under the aerobic conditions typical of most aquifers eliminating secondary water quality issues associated with reducing/anaerobic precipitation technologies. | 12-17-2009 |
| 20100078391 | Residual stream upgrading in a propylene oxide-styrene monomer process - In the co-production of propylene oxide and styrene monomer, there is produced a sodium-containing heavy residue stream previously suitable only as a low grade fuel. In accordance with the invention, the heavy residue stream is mixed with a hydrocarbon and an aqueous acid, and the resulting mixture is separated into an aqueous sodium salt-containing slurry phase and an organic phase reduced in sodium. | 04-01-2010 |
| 20100264092 | PROCESS FOR REMOVING IMPURITIES FROM IRON CHLORIDE SOLUTIONS - The disclosure provides a process for removing dissolved niobium, titanium, and zirconium impurities from an iron chloride solution having an iron concentration of about 50 to about 250 grams/liter comprising: (a) heating the iron chloride solution comprising a compound selected from the group consisting of a niobium compound, titanium compound, zirconium compound, and mixtures thereof, in a vessel, at a temperature of about 120° C. to about 300° C., and at least autogenous pressure, to precipitate the compound as a solid; and (b) separating the solid from the iron chloride solution. The separation of the solid is accomplished by filtration, settling, or centrifugation. In one embodiment, the iron chloride solution is a byproduct of the chlorination process for making titanium dioxide. | 10-21-2010 |
| 20100288707 | METHOD FOR CONDITIONING A WASTE SOLUTION CONTAINING ORGANIC SUBSTANCES AND METALS IN IONIC FORM, OBTAINED DURING WET-CHEMICAL CLEANING OF CONVENTIONAL OR NUCLEAR PLANTS - A method is provided for conditioning a waste solution obtained during the wet-chemical cleaning of conventional or nuclear plants and containing organic substances and metals in ionic form. At least a portion of the organic substance is degraded by electrochemical treatment or UV radiation of the waste solution, at least one metal precipitates by the addition of phosphoric acid and a resultant phosphate precipitate is removed from the waste solution. | 11-18-2010 |
| 20110062085 | Method of Removing Metal Contaminants from High-Density Brines - A method for the removal of soluble metal ion contamination from fluids is disclosed. The method includes passing the contaminated fluid through a filter medium comprising a reducing metal and a filter aid, such as diatomaceous earth, and collecting a filtrate with lower concentration of soluble metal ion contamination. The reducing metal can have a reduction potential of from −0.50 volt to −3.10 volt and can be capable of reducing the soluble metal ions to insoluble metal, which can then be entrapped in the filter medium or otherwise separated. | 03-17-2011 |
| 20110220583 | REMOVAL OF SELENIUM FROM REFINERY WASTEWATER - The invention provides a method of efficiently removing selenium from water. The method involves: adding an oxidant to the liquid, adjusting the liquid's pH to below 7.5, adding ferric salt in an amount such that less than a quarter of selenium in the liquid precipitates and adding a poly dithiocarbamate material to the liquid in an amount such that the amount of poly dithiocarbamate material (in ppm) is greater than the amount of ferric salt (in ppm). This method removes far more selenium than previous methods, and does it using a smaller amount of expensive chemicals. Moreover this method makes it far more likely to achieve cost effective compliance with the ever-increasing environmental standards for selenium in water. | 09-15-2011 |
| 20110220584 | Methods for Removing Impurities from Water - A method for removing undesired substances from liquid water may comprise the steps of: subjecting an oxygen-containing substance to an environment; increasing a temperature within said environment; ionizing said oxygen-containing substance; forming an electrostatically enhanced oxygen species; transferring at least some of said electrostatically enhanced oxygen species to said liquid water; processing said liquid water by action of said electrostatically enhanced oxygen species; creating a charged negatively electrostatically enhanced water species by the presence of said electrostatically enhanced oxygen species in said liquid water; and removing said undesired substances from said liquid water through action of said charged negatively electrostatically enhanced water species in said liquid water, perhaps with the goal of purifying water. Such water may be used in a variety of manners, including but not limited to reuse of the purified water in a closed loop system as a cleaning agent. | 09-15-2011 |
| 20120024798 | Selenium Removal Using Chemical Oxidation and Biological Reduction - Selenium in the form of a reduced species such as selenocyanate is oxidized to produce an oxidized selenium species such as selenate or selenite, and then a biological reduction process is used to remove selenium from the oxidized selenium species. In an example, a chemical oxidant is added to a wastewater containing selenocyanate to produce selenate and selenite. The partially treated wastewater is then fed to a reactor containing a fixed media supporting a biofilm with selenium reducing organisms. The selenium in the selenate and selenite is reduced to an insoluble form of selenium, such as elemental selenium, which precipitates from the wastewater. | 02-02-2012 |
| 20120273431 | ZERO VALENT IRON/IRON OXIDE MINERAL/FERROUS IRON COMPOSITE FOR TREATMENT OF A CONTAMINATE FLUID - The present inventors have discovered a novel composition, method of making the composition, system, process for treating a fluid containing a contaminant. The fluid may be aqueous. The contaminated fluid may be in the form of a suspension. The treatment reduces the concentration of the contaminant. The reduction in concentration of a contaminant may be sufficient so as to effect remediation of the fluid with respect to the contaminant. The treatment may reduce the concentration of a plurality of contaminants. The present composition, system, and process are robust and flexible. The composition includes zero valent iron, an iron oxide mineral, and ferrous iron. The ferrous iron promotes maintenance of the iron oxide mineral. The iron oxide mineral promotes the activity of the zero valent iron. The process and system may involve multiple stages. A stage may be optimized for treatment with respect to a particular contaminant. The present composition, system, and process are effective for treating a fluid containing one or more of a variety of contaminants such as toxic metals, metalloids, oxyanions, and dissolved silica. It may be applied to treating various aqueous fluids, such as groundwater, subsurface water, and aqueous industrial waste streams. | 11-01-2012 |
| 20120312752 | METHOD AND APPARATUS OF REMOVING PHOSPHORUS FROM SEWAGE WASTEWATER BY ELECTROCOAGULATION USING ELECTRODES HAVING POROUS MEMBRANE THEREBETWEEN - Disclosed is a method of removing phosphorus from sewage wastewater by electrocoagulation, comprising: providing an electrode assembly comprising an anode and a cathode with a porous membrane interposed therebetween; placing the electrode assembly in an electrocoagulation tank; passing sewage wastewater through the electrocoagulation tank to treat the sewage wastewater by electrocoagulation; and introducing the treated water into a mixing tank to further treat the water. Also disclosed is an apparatus of removing phosphorus from sewage wastewater by electrocoagulation, comprising: an electrode assembly comprising an anode and a cathode with a porous membrane interposed therebetween; at least one electrocoagulation tank in which the electrode assembly is placed and sewage wastewater is treated by electrocoagulation; and a mixing tank, which receives the treated water and in which treated water passed through the anode and treated water passed through the anode are mixed and further treated to remove untreated phosphorus. | 12-13-2012 |
| 20130186837 | Method and Kit for Reducing Cyanuric Acid Levels in Pool Water - A method and kit is provided for reducing cyanuric acid levels in pool water comprising the steps of adding a reducing agent to remove substantially all of the chlorine from the water, adding a source of melamine to react with the cyanuric acid to form melamine cyanurate, and removing the precipitated melamine cyanyurate. Following completion of the method, the pool water is then re-chlorinated. The application of this method addresses the “green water” problem typically associated with the removal of cyanuric acid from swimming pools with melamine. | 07-25-2013 |
| 20150122743 | Method for Reducing Chemical Oxygen Demand of Waters Containing Starch, Milk, Whey, and Other Similar Behaving Organic Components - A sulfurous acid/lime alkalinization pre-treatment sequential filtration method for industrial wastewaters containing colloids of starch, milk, whey, and other similar acting organic components to condition and remove a number of chemicals/pharmaceuticals and heavy metals before the treated filtrate is land applied or undergoes further biological nitrogen reduction for open stream discharge via anaerobic and aerobic treatment. | 05-07-2015 |
| 20150307375 | PREVENTING MOBILIZATION OF TRACE METALS IN SUBSURFACE AQUIFERS DUE TO THE INTRODUCTION OF OXYGENATED WATER - A method for providing the recharge of water into underground aquifers while preventing the mobilization of trace metals. The recharge water may be used for storage and subsequent withdrawal, or to regain or increase the long term beneficial use of an aquifer. The recharge water may be also be used to influence the groundwater flow in the aquifer. Water is treated and recharged by the addition of a small amount of a sulfide compound to remove dissolved oxygen and prevent dissolution of negative valence sulfur bearing minerals, such as pyrite, in the subsurface. The recharged water may increase the pressure head in the aquifer, alter the groundwater flow pattern to prevent the encroachment of objectionable quality water, or to segregate water of different quality. The recharge water may be fresh or brackish depending on the specific objectives of the application. | 10-29-2015 |
| 20160176742 | Natural Effluent Remediation System | 06-23-2016 |
| 210720000 | Of chromium material | 1 |
| 20110247985 | Hybrid chemical/mechanical method and apparatus for inactivating and removing pharmaceuticals and other contaminants from water - A hybrid chemical/mechanical water treatment plant and method employing rapid sulfur dioxide chemical disinfection and dewatering technology in conjunction with lime and oxidization/reduction agents to removal pharmaceuticals and personal care products from waters to meet operating constraints and environmental permitting restrictions and siting limitations for water treatment. | 10-13-2011 |
