Brent R Constantz, Kasra Farsad, Miguel Fernandez: Desalination methods and systems that include carbonate compound precipitation. Calera Corporation, Bozicevic Field & Francis, June 29, 2010: US07744761 (44 worldwide citation)

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 con ...

Lloyd E Williams, Robert K Mays, Joseph E Wagner III: Production of high capacity inorganic crystalline base exchange materials. J M Huber Corporation, Robert L Price, Harold H Flanders, August 9, 1977: US04041135 (44 worldwide citation)

A method is disclosed for producing inorganic crystalline base exchange materials having high total exchange capacities and specific initial exchange rates which yield well-defined residual concentrations for the elements of Group II of the Periodic Table. The method of the invention includes the co ...

Theodore A Kuepper: Zero waste effluent water desalination system. Theodore A Kuepper, Marvin E Jacobs, August 15, 2000: US06103125 (44 worldwide citation)

A water desalination and softening system that can be used in a home or commercial environment which recirculates water past a membrane filter element in a manner to self clean the membrane and to prevent a buildup of salts and minerals on the membrane surface. The system conserves water so as to re ...

Franklin E Conger: Desalination process system and by-product recovery. Stone & Webster Engineering Corporation, April 11, 1978: US04083781 (44 worldwide citation)

A desalination process system combining reverse osmosis, evaporation and brine concentration with by-product recovery.

Joseph F Pizzino, David B Patchett: Apparatus and process for desalination of seawater. The United States of America represented by the Secretary of the Navy, Luther A Marsh, Howard Kaiser, John Stowe, April 7, 1992: US05102550 (43 worldwide citation)

An apparatus and process for desalination of seawater using a hydrophobic por permeable membrane. Heated seawater is passed across one surface of a membrane at rates which cause the flow to be turbid such that its turbidity is characterized by Reynolds numbers in excess of 1000. Fresh water is passe ...

David H Hopkins: Spiral-wound membrane cartridge. Desalination Systems, Fitch Even Tabin & Flannery, March 6, 1990: US04906372 (43 worldwide citation)

A reverse osmosis or ultrafiltration separation device for treating a liquid feed wherein a separation assembly is wound spirally about a central permeate-carrying tube. The assembly includes an elongated semipermeable membrane envelope which includes an interior permeate passageway and feed-passage ...

Tadahiro Uemura, Hideo Fujimaki, Toshihiro Ikeda: Process of producing composite semipermeable membrane. Toray, Austin R Miller, September 24, 1991: US05051178 (42 worldwide citation)

Alkyldiamine, 1,3,5-trihydroxybenzene or 1,3-dihydroxybenzene is added as a copolymerization component to a polyfunctional aromatic amine component in the amount of 1-20% by weight with respect to the polyfunctional aromatic amine in producing a composite semipermeable membrane by laminating on a mi ...

Masahiro Kuwata: Electrodeionization apparatus. Organo Corporation, Rosenthal & Osha L, August 14, 2001: US06274019 (42 worldwide citation)

Water to be treated (feed water) flows through a series of desalination chambers filled with ion exchange resins on which impurity ions in the feed water are removed. Each desalination chamber consists of a cation-permeable membrane on one side with an anion-permeable membrane on the other side. The ...

Ross M Brown: Combination plumbing fixture for water purification system having waste bypass flow. Desalination Systems Escondido CA, Thomas D Lane, November 16, 1971: US3620241 (42 worldwide citation)

In a water purification system wherein a supply of pressurized, potable, product water is to be dispensed as required, and a small volume flow of nonpressurized byproduct waste water is to be discharged to a potentially contaminated drain, a combination plumbing fixture comprises a body with a valve ...

Robert L Somerville, Samuel F Sweat, John L Sullivan: Method of converting brines to useful products. Killworth Gottman Hagan & Schaeff, January 6, 1987: US04634533 (41 worldwide citation)

A process is provided for the recovery of one or more useful products including fertilizer, animal feed supplements, iron oxide, magnesia, salt, purified brine, and purified water from brines. The source of the brines can be oil and gas field wastes, seawater or effluent from a seawater desalination ...

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