The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 27, 2017
Filed:
Aug. 31, 2015
Lg Chem, Ltd., Seoul, KR;
Lg Nanoh2o, Inc., El Segundo, CA (US);
Alberto Goenaga, Playa Vista, CA (US);
Brett Anderson Holmberg, Redondo Beach, CA (US);
Andrew Ford, Hollywood, CA (US);
Amit Sankhe, Vista, CA (US);
Christopher Kurth, Eden Prairie, MN (US);
Robert Burk, Seattle, WA (US);
Jin Kuk Lee, Daejeon, KR;
Jeff Koehler, Pasadena, CA (US);
Sung Yeol Choi, Daejeon, KR;
Youngsik Eom, Daejeon, KR;
Hyungsam Choi, Daejeon, KR;
LG CHEM, LTD., Seoul, KR;
LG NANOH2O, INC., El Segundo, CA (US);
Abstract
Provided is an interfacial polymerization process for preparation of a highly permeable thin film composite membrane, which can be used for nanofiltration, forward osmosis, or reverse osmosis, particularly for use with brackish water or seawater. The process includes contacting a porous support membrane with an aqueous phase containing a polyamine to form a coated support membrane, and applying an organic phase containing a polyfunctional acid halide to the coated support membrane to interfacially polymerize the polyamine and the polyfunctional acid halide to form a discrimination layer of a thin film composite membrane, where the aqueous and/or organic phases include a flux-enhancing additive and a boron rejection-enhancing additive that includes a biguanide compound, dicarbonate compound, pentathiodicarbonate compound, or salts thereof. Also provided are the membranes prepared by the methods and reverse osmosis modules containing the membranes.