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:
Aug. 02, 2016
Filed:
Aug. 05, 2010
Yasuhiro Ooi, Tokyo, JP;
Keijirou Tada, Tokyo, JP;
Yukio Abe, Takasaki, JP;
Takeshi Iizuka, Takasaki, JP;
Satoru Kitano, Takasaki, JP;
Yasuhiro Ooi, Tokyo, JP;
Keijirou Tada, Tokyo, JP;
Yukio Abe, Takasaki, JP;
Takeshi Iizuka, Takasaki, JP;
Satoru Kitano, Takasaki, JP;
KURITA WATER INDUSTRIES, LTD., Tokyo, JP;
GUN EI CHEICAL INDUSTRY CO., LTD., Takasaki-shi, Gunma, JP;
Abstract
There is provided a water treatment method using a water treatment flocculant that suffers from minimal secondary contamination with flocculation residues and contains an alkaline solution of a phenolic resin. A water treatment method involving the addition of a flocculant to water to be treated and subsequent membrane separation treatment. The flocculant contains an alkaline solution of a phenolic resin having a melting point in the range of 130° C. to 220° C. The water treatment flocculant is produced by a resole-type second-order reaction in the presence of an alkaline catalyst in which an aldehyde is added to an alkali solution of a novolak phenolic resin. The novolak phenolic resin is produced by a reaction between a phenol and an aldehyde in the presence of an acid catalyst.