1
Robert L Somerville, Samuel F Sweat, John L Sullivan: Method of converting brines to useful products. Killworth Gottman Hagan & Schaeff, January 6, 1987: US04634533 (42 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 ...


2
Samuel F Sweat: Method of converting brines to useful products. Brine Extraction Systems Technology Company, John L Gray, July 5, 1988: US04755303 (9 worldwide citation)

A method for recovering useful animal feed supplements and a purefied brine from saline waters, such as oil and gas field brine wastes, involving the steps of adding an oxidizing agent to the brine to convert the divalent ferrous ions in the brine to ferric ions, then adding phosphoric acid in an am ...