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:
Dec. 15, 2020
Filed:
Oct. 14, 2016
Applicant:
Nissan Chemical Industries, Ltd., Tokyo, JP;
Inventors:
Hiroaki Sakaida, Funabashi, JP;
Eiichiro Ishimizu, Funabashi, JP;
Assignee:
NISSAN CHEMICAL INDUSTRIES, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 33/12 (2006.01); C01B 33/141 (2006.01); C01B 33/148 (2006.01); C01B 33/143 (2006.01); B01D 15/38 (2006.01); B01J 39/07 (2017.01); B01D 15/36 (2006.01); B01J 39/04 (2017.01); B01J 39/18 (2017.01); B01J 45/00 (2006.01); B01J 47/026 (2017.01); C09K 3/14 (2006.01);
U.S. Cl.
CPC ...
C01B 33/122 (2013.01); B01D 15/362 (2013.01); B01D 15/3828 (2013.01); B01J 39/04 (2013.01); B01J 39/07 (2017.01); B01J 39/18 (2013.01); B01J 45/00 (2013.01); B01J 47/026 (2013.01); C01B 33/141 (2013.01); C01B 33/148 (2013.01); C01B 33/1435 (2013.01); C01P 2006/60 (2013.01); C09K 3/1409 (2013.01);
Abstract
There is provided a method for obtaining a purified aqueous solution of silicic acid containing less metal impurities such as Cu and Ni using water glass as a raw material with less number of purification steps than that in conventional methods without using any unnecessary additives. The method for producing a purified aqueous solution of silicic acid, the method comprising the steps of: