logo

For the Inventor, By the Inventor

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.:

US 10625217 B1

PDFFull Text
Date of Patent:
Apr. 21, 2020

Filed:

Aug. 20, 2013

Composite separation membrane

Applicant:

Toyobo Co., Ltd., Osaka-shi, Osaka, JP;

Inventors:

Takashi Ohkame, Otsu, JP;

Takahito Nakao, Otsu, JP;

Seiji Watanuki, Otsu, JP;

Assignee:

TOYOBO CO., LTD., Osaka-shi, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Taiwo Oladapo

Int. Cl.
CPC ...
B01D 71/68 (2006.01); B01D 69/12 (2006.01); B01D 67/00 (2006.01); B01D 69/08 (2006.01); B01D 69/02 (2006.01); C02F 1/44 (2006.01); B01D 71/76 (2006.01); B01D 61/02 (2006.01); B01D 71/52 (2006.01);
U.S. Cl.
CPC ...
B01D 71/68 (2013.01); B01D 61/025 (2013.01); B01D 67/0002 (2013.01); B01D 67/0093 (2013.01); B01D 67/0095 (2013.01); B01D 69/02 (2013.01); B01D 69/08 (2013.01); B01D 69/12 (2013.01); B01D 71/76 (2013.01); C02F 1/441 (2013.01); C02F 1/442 (2013.01); B01D 61/027 (2013.01); B01D 67/0018 (2013.01); B01D 71/52 (2013.01); B01D 2325/14 (2013.01); B01D 2325/30 (2013.01);
Abstract

The present invention provides a composite separation membrane having a separation layer formed of SPAE on the surface of a porous support membrane wherein the porous support membrane and a coat of SPAE are firmly adhered with each other so that separation property and water permeation property continue for a long period. The present invention is a composite separation membrane having a separation layer on the surface of a porous support membrane, characterized in that said porous support membrane contains 50% by mass or more of polyphenylene ether, and that said separation layer is formed of a sulfonated polyarylene ether copolymer constituted from a repeating structure of a specific hydrophobic segment and a specific hydrophilic segment. The composite separation membrane of the present invention is suitable as a liquid treating membrane such as a nanofiltration membrane and a reverse osmosis membrane.

Find Patent Forward Citations

Loading…