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:
Jan. 31, 1978
Filed:
Dec. 13, 1976
Applicant:
Inventors:
Glenn Dale Cooper, Delmar, NY (US);
Daniel Edwin Floryan, Glenmont, NY (US);
Assignee:
General Electric Company, Pittsfield, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ;
U.S. Cl.
CPC ...
260 / ;
Abstract
A process for the recovery of copper catalyst from the polymerization of polyphenylene ethers comprises forming a complex of the catalyst and an amino acid chelating agent, separating the complex from the polymerization mixture, contacting the complex with a reducing sugar in an alkaline medium to precipitate the copper as an oxide and, optionally, acidifying the alkaline medium to precipitate and recover the amino acid chelating agent.