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. 17, 2009
Filed:
Aug. 31, 2005
Henry W. Schussler, Harrison City, PA (US);
Joseph R. Cimini, Lake Charles, LA (US);
Robert A. Fast, Westlake, LA (US);
Berry G. Garrard, Lake Charles, LA (US);
Steven T. Richardson, Lake Charles, LA (US);
Henry W. Schussler, Harrison City, PA (US);
Joseph R. Cimini, Lake Charles, LA (US);
Robert A. Fast, Westlake, LA (US);
Berry G. Garrard, Lake Charles, LA (US);
Steven T. Richardson, Lake Charles, LA (US);
PPG Industries Ohio, Inc., Cleveland, OH (US);
Abstract
Describes a method for lowering the flow of liquid anolyte through perforations in the diaphragm of a diaphragm electrolytic cell, e.g., a chlor-alkali diaphragm electrolytic cell, comprising introducing ceramic fiber into the anolyte compartment of the electrolytic cell, e.g., during cell operation. The benefits described for lowering the flow of anolyte liquor through the diaphragm of a chlor-alkali diaphragm electrolytic cell are increasing the concentration of alkali metal hydroxide, e.g., sodium hydroxide, and decreasing the concentration of hypochlorite ion, e.g., sodium hypochlorite, in the catholyte liquor. Also describes introducing dopant material and/or fibers comprising halogen-containing polymer, e.g., fluorocarbon polymer fibers, into the anolyte compartment of the electrolytic cell in conjunction with the addition of ceramic fiber into the anolyte compartment, e.g., during cell operation.