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. 11, 2004
Filed:
Dec. 21, 2001
Shin Sato, Tokyo, JP;
Takayuki Moribe, Tokyo, JP;
Kurita Water Industries Ltd., Tokyo, JP;
Abstract
An electrodeionization apparatus has an anolyte compartment having an anode , a catholyte compartment having a cathode , concentrating compartments , and desalting compartments . The concentrating compartments and the desalting compartments are alternately formed between the anolyte compartment and the catholyte compartment by alternately arranging a plurality of anion-exchange membranes and a plurality of cation-exchange membranes . The desalting compartments are filled with ion-exchanger and the concentrating compartments are filled with ion-exchanger, activated carbon, or electric conductor. Electrode water flows into the anolyte compartment and the catholyte compartment . Concentrated water is introduced into the concentrating compartments . Raw water is fed into the desalting compartment to produce the deionized water from the desalting compartment . Water containing silica or boron at a lower concentration than the raw water is introduced into the concentrating compartments as the concentrated water in a direction from a side near an outlet for the deionized water toward a side near an inlet for the raw water of the desalting compartments . At least a part of concentrated water flowing out of the concentrating compartments is discharged out of a circulatory system.