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:
Jul. 16, 2002
Filed:
Feb. 06, 2001
Applicant:
Inventors:
Cornelius Adrianus Maria van Gool, Roosendaal, NL;
Martin Herke Oyevaar, Goes, NL;
Anthony Warren, Evansville, IN (US);
Claude Tinney, Montgomery, AL (US);
Mingjie Zhu, Evansville, IN (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J 3/16 ;
U.S. Cl.
CPC ...
C08J 3/16 ;
Abstract
This invention relates to an economical and efficient process for purifying a reaction mixture obtained in a two-phase interfacial reaction for the preparation of polycarbonate. More particularly, the method of the invention provides for separating the reaction mixture into an organic phase, which includes the desired polycarbonate and undesirable impurities, and an aqueous phase. The organic phase is further purified by using a plate decanter in combination with coalescence and centrifugation.