Gerhard Kunz: Process and device for adding ions to liquids, particularly aqueous solutions. Fleit Jacobson Cohn & Price, October 27, 1987: US04702810 (33 worldwide citation)

Process and apparatus adds counterions into the aqueous solution of an electrode chamber of an electrolytic desalination or demineralization unit. In the demineralization unit, oppositely charged ions are electrolytically generated within electrode chambers and defused into the stream of aqueous sol ...

Adam Robbins: Semipermeable membrane cartridge and method of making. Desalination Systems, Fitch Even Tabin & Flannery, April 28, 1992: US05108604 (33 worldwide citation)

Cartridges for use in ultrafiltration or reverse osmosis separation devices are formed by injection molding a generally tubular, smooth, seamless shell about a spirally-wrapped semipermeable membrane assembly. These cartridges can be used within traditional separation devices having pressure vessels ...

Douglas C Hicks, Charles M Pleass: Wave-powered desalination of seawater. University of Delaware, December 20, 1983: US04421461 (33 worldwide citation)

This invention provides efficient and cost effective water wave-powered piston pumps. Utility of such pumps is demonstrated in the reverse osmosis desalination of seawater.

Brent R Constantz, Kasra Farsad, Miguel Fernandez: Desalination methods and systems that include carbonate compound precipitation. Calera Corporation, April 26, 2011: US07931809 (32 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 ...

John R Kirwan Jr, Donald T Bray: Semipermeable membrane cartridge for use with a pressure container. Desalination Systems, Fitch Even Tabin & Flannery, October 22, 1985: US04548714 (32 worldwide citation)

An improvement in a membrane cartridge for insertion into a pressure-resistant container and having a central passageway holding a permeate collection tube. A cartridge is formed, at least in part, by a spiral winding of a laminate leaf comprising semipermeable membrane sheet material, permeate tran ...

Esmond William G: Pleated membrane transfer device. Becton Dickinson and Company, October 3, 1972: US3695445 (32 worldwide citation)

This disclosure relates to an exchange device employed in desalination, ultra filtration, in the transfer of heat, the transfer of gas from the gas phase to the liquid phase, or the transfer of gases from the gas phase to another gas phase or the opposite sides of a permeable or permselective membra ...

E Allan Blair: Desalination process. Saudi Basic Industries Corporation, Fred A Keire, William J Spatz, October 11, 1994: US05354835 (32 worldwide citation)

Polyurethane polymers useful as hydrogels wherein the polyol is a specific polyol of block copolymers and a method for desalination of water.

Bray Donald T: Water purification system for small reverse osmosis unit with integral blowdown water disposal. Desalination Systems, July 17, 1973: US3746640 (31 worldwide citation)

The supply water inlet connection of a conventional reverse osmosis water purifying unit is connected to a pressurized water supply pipe, and the blowdown water connection of the unit is connected to a pressurized enclosure having, when stabilized, a pressure equal to that of the water supply pipe, ...

Donald T Bray: Membrane cartridge. Desalination Systems, Clement H Allen, June 29, 1976: US03966616 (31 worldwide citation)

An improved spiral wound reverse osmosis or ultrafiltration membrane cartridge has the inner end and side areas of a permeate transfer leaf sealingly attached to its central collection tube surface, with sealing adhesive applied as band areas near each side edge of the proximate transfer leaf surfac ...

William Graham: Water desalination. Garfield International Investments, Pollock Vande Sande & Amernick R L, October 31, 2000: US06139750 (30 worldwide citation)

A desalination plant is disclosed which includes a pump for pumping water at a pressure of between 50 and 65 Bar to a generally cylindrical filter element which includes a plurality of reverse osmosis membranes defining salt passages. Immediately upstream of the filter element there is a disc with a ...

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