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 9550153 B1

PDFFull Text
Date of Patent:
Jan. 24, 2017

Filed:

Dec. 11, 2013

Porous polymer flat-sheet membrane

Applicant:

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

Inventors:

Junsuke Morita, Otsu-shi, JP;

Masao Higashi, Otsu-shi, JP;

Norifumi Shimada, Otsu-shi, JP;

Tooru Kitagawa, Otsu-shi, JP;

Assignee:

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

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Ana Fortuna

Int. Cl.
CPC ...
B01D 39/00 (2006.01); B01D 39/14 (2006.01); B01D 67/00 (2006.01); B01D 69/06 (2006.01); B01D 69/02 (2006.01); B01D 71/22 (2006.01); C02F 3/12 (2006.01); B01D 69/10 (2006.01); B01D 69/12 (2006.01); B01D 71/12 (2006.01); B01D 71/30 (2006.01); B01D 61/14 (2006.01);
U.S. Cl.
CPC ...
B01D 69/06 (2013.01); B01D 67/0088 (2013.01); B01D 69/02 (2013.01); B01D 69/10 (2013.01); B01D 69/12 (2013.01); B01D 71/12 (2013.01); B01D 71/22 (2013.01); B01D 71/30 (2013.01); C02F 3/1268 (2013.01); B01D 61/145 (2013.01); B01D 61/147 (2013.01); B01D 2311/2688 (2013.01); B01D 2323/02 (2013.01); B01D 2323/04 (2013.01); B01D 2323/08 (2013.01); B01D 2323/22 (2013.01); B01D 2323/46 (2013.01); B01D 2325/028 (2013.01); B01D 2325/24 (2013.01); B01D 2325/28 (2013.01); B01D 2325/36 (2013.01); B01D 2325/38 (2013.01);
Abstract

The present invention provides a porous polymer flat-sheet membrane for MBR wherein surface of the porous polymer membrane is kept hydrophilic for a long period and high water permeability and anti-fouling properties are kept. A porous polymer flat-sheet membrane for MBR comprising a hydrophobic porous polymer membrane forming a network structure and a sheet substrate supporting it, characterized in that at least surface of the porous polymer membrane is coated and fixed with an insolubilized hydroxypropyl cellulose, that a ratio of the hydroxypropyl cellulose to the porous polymer membrane is 0.4 to 1.0% by weight and that, when NMR spectrum of the hydroxypropyl cellulose coated on and fixed to the membrane is measured using a nuclear magnetic resonance apparatus (proton NMR), an intensity ratio (B/A) of a spectral peak (B) appearing at 4.12 ppm to a spectral peak (A) appearing at 3.75 ppm is 12 to 30%.

Find Patent Forward Citations

Loading…