Patent ID: 8852436
Filing Date: 2014-10-07
Classification: B01D,C02F,Y02A,Y02W

Abstract:
1. A method of recovering a solvent from a feed stream comprising the solvent and dissolved solutes, comprising the steps of: inducing a flow of the solvent from the feed stream into an osmotic agent solution stream to cause separation of the solvent from the dissolved solutes; introducing a polymer having a cloud point temperature into a first separator comprising the osmotic agent solution stream at a first temperature; extracting the solvent from the osmotic agent solution stream at the first temperature, whereby a two-phase mixture comprising a first phase and a second phase is created, the first phase comprising the osmotic agent solution stream and the second phase comprising the polymer with the extracted solvent; separating the second phase from the first phase; heating the second phase in a second separator to at least the cloud point temperature of the polymer to form a polymer rich phase and a solvent rich phase; and separating the polymer rich phase and solvent rich phase comprising at least 95 wt % of the extracted solvent.