Patent ID: 7789159
Filing Date: 2010-09-07
Classification: B01D,C02F,C09K,E21B,Y02A,Y02P,Y02W

Abstract:
1. A method for separating sulfate from saline water to produce nearly sulfate-free saline stream and inorganic materials, said method comprising the steps of: (a) removing sulfate from said saline water by (b) injecting said nearly sulfate-free saline stream into subterranean formation for hydrocarbons recovery; or (c) feeding said nearly sulfate-free saline stream into conventional seawater desalinations plants and auxiliary equipments; or (d) producing de-ionized water from said nearly sulfate-free saline stream by membrane distillation; (e) producing gypsum boards or gypsum materials from said gypsum slurry by (f) producing potassium sulfate and calcium chloride from said gypsum slurry by