Title:
TWO-LAYER MEMBRANE
Document Type and Number:
WIPO Patent Application WO/2012/097386
Kind Code:
A3
Abstract:
A method of forming a two-layered membrane by immersion precipitation including: depositing a first hydrophilic polymer solution with a formulation optimized to produce a high performance porous layer; depositing on top of the first hydrophilic polymer solution a second, different hydrophilic polymer solution optimized to produce a high performance dense layer; and forming the two-layer polymer solution into one of a forward osmosis membrane and a pressure retarded osmosis membrane by bringing the second, different hydrophilic polymer solution into contact with water to form the dense layer. A two-layered membrane formed by immersion precipitation includes: a porous layer formed from a first hydrophilic polymer solution with a formulation optimized to produce a high performance porous layer; and a dense layer on top of and supported by the porous layer, the dense layer formed from a second, different hydrophilic polymer solution optimized to produce a high performance dense layer.
Inventors:
HERRON JOHN R (US)
Application Number:
PCT/US2012/028513
Publication Date:
January 23, 2014
Filing Date:
March 09, 2012
Export Citation:
Assignee:
HYDRATION SYSTEMS LLC (US)
HERRON JOHN R (US)
HERRON JOHN R (US)
International Classes:
B01D61/00; C02F1/44
Foreign References:
| US20060226067A1 | 2006-10-12 | |||
| US20110073540A1 | 2011-03-31 | |||
| US20070251883A1 | 2007-11-01 | |||
| US6849184B1 | 2005-02-01 |
Attorney, Agent or Firm:
ROSENFIELD, Susan Stone (P.C.3003 North Central Avenue,Suite 260, Phoenix Arizona, US)
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