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:
Mar. 30, 1999
Filed:
Oct. 29, 1997
Applicant:
Inventor:
Francesco Posar, Rosignano-Solvay, IT;
Assignee:
Solvay (Societe Anonyme), Bruseels, BE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
204537 ; 204538 ; 205510 ; 205512 ; 205514 ;
Abstract
Process for manufacturing sodium hydroxide by the electrodialysis of sodium carbonate in an electrodialysis cell having three compartments, in which an aqueous sodium carbonate solution is introduced into a compartment of the cell which is bounded between two cationic membranes, an acid is introduced into a compartment which is bounded between one of the cationic membranes and a cationic face of a bipolar membrane, and an aqueous sodium hydroxide solution is removed from a compartment which is adjacent to an anionic face of the bipolar membrane.