Douglas C Hicks, Charles M Pleass: Wave-powered desalination of seawater. University of Delaware, December 20, 1983: US04421461 (34 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.

Bray Donald T: Reverse osmosis system with automatic valve for module operation control. Desalination Systems, Allen Clement H, June 3, 1975: US3887463 (34 worldwide citation)

A reverse osmosis system includes a pressurized purified water storage container and an automatic valve. The valve has a sealing member spanning a first internal cavity and movable responsive to the pressure of purified water in the storage container. A central internal cavity is of effective cross ...

Hisao Hachisuka, Kenichi Ikeda: Composite reverse osmosis membrane having a separation layer with polyvinyl alcohol coating and method of reverse osmotic treatment of water using the same. Nitto Denko Corporation, Akin Gump Strauss Hauer & Feld L, January 23, 2001: US06177011 (33 worldwide citation)

A reverse osmosis composite membrane that has a high salt rejection, a high water permeability, and a high fouling tolerance, and permits practical desalination at a relatively low pressure is provided by coating the surface of a reverse osmosis membrane of aromatic polyamide with polyvinyl alcohol ...

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 ...

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 ...

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