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. 29, 1977
Filed:
Dec. 10, 1975
Noriyuki Yokota, Ashiya, JA;
Shingo Tokuda, Nishinomiya, JA;
Yoshiro Ito, Amagasaki, JA;
Kenji Itaya, Amagasaki, JA;
Osaka Soda Co. Ltd., Osaka, JA;
Abstract
A method of purifying the raw brine used in the electrolysis of the aqueous NaCl or KCl solution by removing the Mg and Ca ions from said brine, which comprises contacting said brine with a member selected from the group consisting of A. the chelate-forming water-insoluble resins capable of forming an intramolecular complex with the Mg and Ca ions said resins being selected from the class consisting of the styrene-butadiene copolymer resins containing the group .ltoreq.N--CH.sub.2 COOH, the epichlorohydrin polymer resins containing the group >N--CH.sub.2 COOH, the N-phenyl glycine-glycidyl methacrylate copolymer resins containing the group >N--CH.sub.2 COOH and the styrene-divinylbenzene copolymer resins containing the group >N--CH.sub.2 COOH; and B. the water-insoluble adsorbent solids adsorptively supporting a chelate-forming compound selected from the group consisting of the aminoacetic acids containing at least one >N--CH.sub.2 COOH in their molecular structure and the oligomers and the alkali metal salts thereof.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile