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:
Nov. 09, 1993
Filed:
Jul. 30, 1991
Applicant:
Inventors:
Assignees:
Nippon Rensui Company, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210652 ; 210654 ; 210655 ; 210661 ; 210681 ; 210760 ; 210900 ; 2101952 ; 2102572 ;
Abstract
In an apparatus and method for purifying water, an oxidation forcibly turns colloidal substances into fine particles of oxides, thus increasing the size of the particles. The effluent of oxidation process is treated by ion exchange process, and then treated by membrane process. Because of the increased size of the particles, they are easily removed in the subsequent ion exchange process. The membrane process is thereby prevented from clogging up, and then removes fine particles that cannot be removed by the ion exchange process. Colloidal substances are thus removed effectively from raw water.