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:
May. 20, 2003
Filed:
Jul. 12, 2001
Shin Sato, Tokyo, JP;
Kurita Water Industries, LTD, Tokyo, JP;
Abstract
Feed water, fed through an inlet into a desalting compartment , flows around the end of a anion-exchange membrane surrounding an anode . The feed water enters into a portion defined between the anion-exchange membrane and a cation-exchange membrane , and flows around the end of the cation-exchange membrane surrounding a cathode . Then, the water to be treated further flows around the ends of ion-exchange membranes surrounding an anode and a cathode , respectively, and then flows out through a product water outlet . A part of product water is supplied to the concentrated water circulating within the concentrating compartment . A part of the concentrated water flowing out of the concentrating compartment is added to concentrated water circulating within the concentrating compartment . The diffusion of silica from the concentrating compartment is restricted. As a result, final product water containing extremely low silica concentration is obtained.