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:
Mar. 04, 2008
Filed:
May. 24, 2002
Yoshiaki Koga, Tokuyama, JP;
Takao Hasegawa, Tokyo, JP;
Hiroyuki Ookubo, Tokyo, JP;
Tokuyama Corporation, , JP;
Abstract
The invention provides metal-silica polymeric flocculants having high coagulation performance which are used for water treatment, particularly to remove suspended materials and other impurities from irrigation water, waste water or the like. A silica sol having a SiOconcentration of from 100 to 200 g/L and a viscosity of less than 6 cp is prepared by colliding an inorganic acid aqueous solution with a silicate aqueous solution at each rate of 5 m/sec or more. The silica sol is aged to make an aged silica sol having a viscosity of 6 to 30 cp, and the aged silica sol is mixed with a water-soluble metal salt such as ferric chloride, to prepare the flocculants.