Patent ID: 9580337
Date: 2017-02-28
CPC Classifications: B01D,C01F,C02F,Y02A

Claim:
1. A pressurized forward osmosis separation method, the method comprising: providing a semi-permeable membrane comprising a first surface and a second surface, wherein the first semi-permeable membrane surface is opposite to the second semi-permeable membrane surface; contacting a first solution with the first semi-permeable membrane surface, wherein the first solution comprises a first solvent and a target solute; and contacting a second solution with the second semi-permeable membrane surface, wherein the second solution comprises a second solvent and a magnesium ion species, wherein the magnesium ion species is at least one selected from the group consisting of magnesium oxide, magnesium hydroxide and magnesium carbonate; whereby an osmotic concentration gradient is formed across the semi-permeable membrane, thus promoting flow of at least a portion of the first solvent from the first solution across the semi-permeable membrane to the second solution, thereby generating a third solution in contact with the first semi-permeable membrane surface and a fourth solution in contact with the second semi-permeable membrane surface.