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. 16, 1993
Filed:
Dec. 21, 1990
Applicant:
Inventors:
Carolyn Byszewski, Whippany, NJ (US);
Yu-Chih Chiao, Bridgewater, NJ (US);
Assignee:
Allied-Signal Inc., Morristown, NJ (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
2041824 ; 2041825 ; 204301 ;
Abstract
The present invention relates to a method and an apparatus of electodialytically treating an acid such as citric acid to produce a desired salt of the anion of the acid, such as sodium citrate. A cation can be introduced into a solution via a cheap donor salt solution such as NaCl or KCl, without significantly altering or degrading the purity of the final product. The apparatus comprises a three-compartment cell, which comprises at least two adjacent anion selective membranes to accomplish a cation substitution reaction exploiting the differential selectivities of the adjacent anion membranes employed.