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:
Feb. 22, 1994
Filed:
Apr. 15, 1993
Applicant:
Inventor:
Shoibal Banerjee, Newark, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25B / ;
U.S. Cl.
CPC ...
204252 ; 204296 ; 521 27 ; 427243 ; 427337 ;
Abstract
A diaphragm for electrolyzing alkali metal chloride solutions is provided which is one or more layers of a porous support, coated with a perfluoro ion exchange polymer and then wet with a wetting solution which has a surface tension of 22 to 45 dynes/cm. The wetting solution is preferably an aqueous alcohol and most preferably aqueous 3-6.5% butanol. The wetting solution assists in initial water penetration into the pores of the diaphragm, rendering the diaphragm hydrophilic so as to resist gas locking and premature shutdown of the electrolytic cell.