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:
Aug. 06, 1985
Filed:
Jan. 08, 1982
Donald A Bolon, Scotia, NY (US);
Thomas B Gorczyca, Schenectady, NY (US);
John E Hallgren, Scotia, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
Diaryl and substituted diaryl carbonates are formed by a series of steps, the first step involving the production of a dialkyl carbonate from an alkanol, carbon monoxide and oxygen; and the second step involving the reaction of the dialkyl carbonate with a phenyl ester or substituted phenyl ester in the presence of a dialkyl tin compound to produce a mixture of diaryl carbonate, alkyl aryl carbonate, and an alkyl ester. The alkyl ester can be heated to reform the alkanol and form ketene; in turn the ketene can be reacted with the phenol or substituted phenol to form the phenyl ester or substituted phenyl ester used in the second step above.