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:
Feb. 14, 1978
Filed:
Feb. 14, 1977
Applicant:
Inventors:
Philip L Kinson, Clifton Park, NY (US);
Clayton B Quinn, Mount Vernon, IN (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2606 / ; 2605 / ; 2605 / ; 2606 / ; 560 57 ;
Abstract
A method is provided for dehydrochlorinating 1,1,1-trichloro-2,2-bis(4-hydroxyphenyl)ethane to produce substantially pure 1,1-dichloro-2,2-bis(4-hydroxyphenyl)ethylene, based on the employment of a dipolar aprotic solvent and a basic alkali metal compound, such as sodium hydroxide, sodium carbonate, etc. Crystallization of the 1,1-bis(p-hydroxyphenyl)-2,2-dichloroethylene from the dehydrochlorination reaction mixture can provide monomer useful for making high impact, flame retardant thermoplastic polycarbonates.