Patent ID: 7963338
Filing Date: 2011-06-21
Classification: B01D,C02F,Y02A,Y02W

Abstract:
1. A method for separating alkaline earth cations, brucite and hydrophilite from produced water to produce partially de-salted produced water, said method comprising the steps of: (a) removing said alkaline earth cations from said produced water by (b) removing said brucite from said second intermediate stream by (c) removing said hydrophilite from said third intermediate stream by (d) injecting said partially de-salted produced water into subterranean formation for hydrocarbons recovery; or (e) using said partially de-salted produced water for oil-fields fire extinguishing; or (f) using said partially de-salted produced water for dust control; or (g) producing de-ionized water from said partially de-salted produced water by membrane distillation.