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| Number | Title | Issue Date |
| 8119007 | Water desalination using directional solvent extraction Substantially pure water is produced via desalination using a directional solvent that directionally dissolves water but does not dissolve salt. The directional solvent is heated to dissolve water from the salt solution into the directional solvent. The remaining hi... | 02/21/2012 |
| 8048309 | Seawater-based carbon dioxide disposal A method for disposing of carbon dioxide is provided. According to the invention, CO2 is dissolved in seawater and the salinity of the seawater is increased to produce CO2-containing brine. The CO2-containing brine is denser than the... | 11/01/2011 |
| 7329425 | Process for natural recycling of protein waste An apparatus and process for naturally recycling poultry carcasses for use as a nutritional supplement, the apparatus generally consists of four modules: an enzymatic digest medium mixing assembly that self adjusts for pH; a mobile grinding assembly mounted on a tru... | 02/12/2008 |
| 7251939 | General method for disposal of produced water A method and apparatus useful for disposing of the high volumes of produced water associated with coal bed methane natural gas wells. The method taught is to create steam from the produced water and vent the steam into the atmosphere. The apparatus taught utilizes a... | 08/07/2007 |
| 7107838 | Apparatus and methods for monitoring water consumption and filter usage Apparatus and methods for employing electrical properties of water to indicate the level of filtered water in a filtered water container. The container is fitted with a hopper that holds unfiltered water. The hopper is fitted at its base with a removable and replace... | 09/19/2006 |
| 7067057 | Fluid conveyed material collection system The present invention is for processing fluids, especially waste streams from nuclear power plants, and other fluid media that may be carrying valuable or useful substances, in order to collect the substances. The system uses sequential filtering and multiple passes... | 06/27/2006 |
| 6946081 | Desalination system The invention provides methods and an apparatus for more efficiently and economically producing purified water from sea water or some other salty or brackish water source. The efficiency is derived from the co-location with a power plant or other thermal generating ... | 09/20/2005 |
| 6942797 | Filtration using pressure vessel with multiple filtration channels A filtration system includes an outer casing (210) that houses a plurality of elongated inner casings (220A–220F), which in turn house a plurality of filtration membranes. The outer casing, inner casing, and filtration membranes are disposed r... | 09/13/2005 |
| 6391205 | Osmotic desalinization process Desalinization of seawater is accomplished through the use of a forward osmosis process, which relies on a series of steps involving the opposition of various aqueous solutions across semi-permeable membranes. The process takes advantage of solutes having... | 05/21/2002 |
| 6071411 | Method of treating soil for controlling dust and for effecting soil stabilization through the application of waste water The invention relates to a method of stabilizing soil and controlling dust from soil. The invention also relates to disposing of unwanted waste waters produced in purifying water. The method of the present invention includes applying waste water containin... | 06/06/2000 |
| 5938928 | Osmotic distillation process using a membrane laminate An osmotic concentration process for selectively extracting one or more volatile components from other components in a liquid mixture across a membrane structure which includes a semipermeable barrier film attached to a non-liquid-wettable microporous mem... | 08/17/1999 |
| 5824223 | Methods and apparatus for osmotic distillation Methods and apparatus are provided for osmotic distillation employing dehydrating aqueous solutions of potassium salts of phosphoric acid, pyrophosphoric acid, acetate, and blends thereof. Methods are also provided for the simultaneous osmotic distillatio... | 10/20/1998 |
| 5679254 | Desalination of seawater by nonionic surfactant aided phase separation A novel process for the extraction of salt from seawater based on the unique solubility properties of nonionic surfactants and the relative phobia of inorganic salts to organic surfactants has been developed. Nonionic surfactant is first added to the seaw... | 10/21/1997 |
| 5627145 | Composition and method for controlling phosphonates tending to precipitate metal ions in water A method for controlling phosphonates which tend to precipitate with metal ions in water treatment operations comprising, adding to the water a water-soluble copolymer containing one or more of the following monomeric units: ##STR1## in which: R... | 05/06/1997 |
| 5512176 | Desalination process Polyurethane polymers useful as hydrogels wherein the polyol is a specific polyol of block copolymers and a method for desalination of water.... | 04/30/1996 |
| 5453416 | Composition and method for controlling phosphonates tending to precipitate metal ions in water A method for controlling phosphonates which tend to precipitate with metal ions in water treatment operations comprising, adding to the water a water-soluble copolymer containing one or more of the following monomeric units: [a] ##STR1## in whi... | 09/26/1995 |
| 5346620 | Process for waste water treatment by removal of sodium sulfate The present invention is a process for treatment of waste water streams having a sodium sulfate content of above 20 percent. The process is useful for treating waste water generated in the production of polyethyleneimine and cyclohexanone. The process inc... | 09/13/1994 |
| 5296148 | Reverse osmosis water purifier A water purification apparatus utilizing a reverse osmosis cartridge which supplies a measured amount of potable water to substantially fill an open top pitcher of known desired size. This free-standing apparatus includes an electric pump which withdraws ... | 03/22/1994 |
| 5147646 | Hydrogel containing envelopes An envelope having flexible water-permeable or porous walls contains a quantity of particulate water-insoluble hydrogel. The quantity of hydrogel in the envelope is such that, when the hydrogel is fully swollen at 20° C., its volume is at least 66%, pref... | 09/15/1992 |
| 5128042 | Desalination of brackish water or brine from hydrocarbon wells Non-brackish water can be produced from the brackish water or brine containing at least 500 ppm total dissolved solids coproduced in many active hydrocarbon product wells and found in many inactive gas wells. The brackish water or brine is desalinated pro... | 07/07/1992 |
| 5084182 | Method for manufacturing of multilayer reverse osmosis membrane of polyamide-urea The present invention is directed to methods for using an improved reverse osmosis membrane that shows surprisingly improved solute rejection and permeation properties. The membrane includes a separating layer of a polyamideurea formed in situ by reaction... | 01/28/1992 |
| 5076934 | Desalination of brackish water from oil wells Non-brackish water can be produced from the brackish water found in many inactive oil wells. The inactive well is perforated at the level known to have brackish water and the water is pumped out. The brackish water is desalinated producing non-brackish wa... | 12/31/1991 |
| 5055237 | Method of compacting low-level radioactive waste utilizing freezing and electrodialyzing concentration processes A volume reduction process comprises combinations of a freezing eutectic, bulk, indirect crystallization process and a radwaste electrodialysis process. When employed as a liquid radioactive waste management system (LWMS) for light water reactors (LWR's),... | 10/08/1991 |
| 5037555 | Desalination of water Desalination of water is effected by use of a polyimine membrane which has been cross-linked with a combination of aliphatic and aromatic polyisocyanate or with a polycarbonyl chloride cross-linking agent.... | 08/06/1991 |
| 5028337 | Coated membranes Composite membranes are provided comprising an underlying membrane selected from the group consisting of microfiltration, ultrafiltration and reverse osmosis membranes; and a coating thereon comprising at least one member selected from the group consistin... | 07/02/1991 |
| 5013448 | Process for the preparation of chlorine-resistant polyester semipermeable membranes Semipermeable membranes comprising polyesters which are resistant to chlorine are prepared by casting on a porous support backing material either a solution comprising a blend of a polymeric hydroxyalkyl acrylate and a polymeric monocarboxylic acid, or a ... | 05/07/1991 |
| 4983305 | Power recovery pump turbine The invention is directed to an energy recovery pump turbine for use in industrial processes where a fluid is pumped at a high pressure to the process and at least a portion of the fluid is discharged from the process at a high pressure. A turbine is posi... | 01/08/1991 |
| 4879042 | Method of crystallizing salts from aqueous solutions Method of crystallizing from aqueous solution an inorganic solute, whose solubility in water varies relatively litter with temperature such that crystallizing by adjustment of temperature results in low yield, such method comprising contacting a concentra... | 11/07/1989 |
| 4781837 | Method of performing osmetic distillation A hydrophobic semi-permeable membrane process (e.g., using hydrophobic microporous hollow fibers) for the concentration of a dilute solution of low osmotic pressure by osmotic distillation (also known as membrane distillation or membrane evaporation), whi... | 11/01/1988 |
| 4652375 | Process for selectively extracting dissolved salts from aqueous media A process is provided wherein dissolved salts are selectively extracted from aqueous saline media by contacting the aqueous media with a solvent comprising a water insoluble organic diluent such as kerosene and a surfactant capable of effecting a prefernt... | 03/24/1987 |
| 4632760 | Method of treating aqueous solutions Method of treating an aqueous solution of a non-volatile inorganic solute to produce a more concentrated solution or to crystallize solid solute from the solution. The solution is contacted at a higher temperature T1 with a suitable organic liq... | 12/30/1986 |
| 4617125 | Separations by supported liquid membrane cascades The invention describes a new separation technique which leads to multi-stage operations by the use of a series (a cascade) of alternated carrier-containing supported-liquid membranes. The membranes contain alternatively a liquid cation exchanger extracta... | 10/14/1986 |
| 4430227 | Method of concentrating aqueous solutions Method of concentrating aqueous solutions of non-volatile, ionic solutes by extracting water from the solution by means of a polar organic liquid (or a solution of a polar organic liquid and a non-polar organic liquid) at an elevated temperature and cooli... | 02/07/1984 |
| 4392959 | Process for sterilization and removal of inorganic salts from a water stream Inorganic salts are removed from an unpotable water stream, which contains suspended living microorganisms and their debris products, particularly seawater or agricultural field drainage water. Chemicals such as caustic soda and/or chlorine, and derivativ... | 07/12/1983 |
| 4261818 | Method for making separations from aqueous solutions Method and apparatus for making separations from aqueous solutions, particularly for removing water from aqueous solutions of electrolytes or other substantially non-volatile solutes, such as saline water. According to the invention, a solvent extraction ... | 04/14/1981 |
| 4253948 | Dehydration of water soluble monomers with liquid carbon dioxide Separation of certain water soluble organic monomers such as acrylic acid from an aqueous solution can be accomplished by extraction with carbon dioxide, crystallizing the extract to remove carbon dioxide hydrate, and flashing off the remaining carbon dio... | 03/03/1981 |
| 4142966 | Membrane separation of water from aqueous mixtures Water is separated from aqueous mixtures of organic and inorganic compounds by contacting the aqueous mixture against a first surface of a polymeric membrane selectively permeable to water, contacting the second surface of the membrane with a sweep liquid... | 03/06/1979 |
| 4017421 | Wet combustion process Aqueous solutions and suspensions of solid particles, even those containing less than one percent of organic materials, may be combusted with air, oxygen, or their mixtures in a process which provides for preheating in countercurrent batches of the raw or... | 04/12/1977 |
| 3983032 | Brine desalination process with phase-breaking by cold hydrocarbon injection Described is an improvement in a water desalination process comprising extracting salt water with a hydrocarbon to form a salt-water hydrocarbon phase having a temperature of 500° to 650° F wherein the phase is broken into salt-free water and hydrocarbo... | 09/28/1976 |
| 3962076 | Process for converting aqueous sewage to potable water Disclosed herein is a process for disposing of aqueous sewage and for producing fresh water by coking the sewage in the liquid phase to form gases, coke and an effluent which is extracted with a hot liquid hydrocarbon to form a hydrocarbon-water solution ... | 06/08/1976 |
