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, 1996
Filed:
May. 18, 1995
Hideaki Tsuneki, Tokyo, JP;
Yoshiyuki Onda, Suita, JP;
Atusi Moriya, Suita, JP;
Hiroshi Yoshida, Suita, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
Carboxylate (1) of the formula R.sup.1 COOR.sup.2 (where each of R.sup.1 and R.sup.2 independently represents an alkyl group, an alicyclic hydrocarbon group or an aryl alkyl group), an aromatic hydroxy compound of the formula R.sup.3 OH (where R.sup.3 represents an aromatic group with or without a substituent), and a catalyst are supplied to a batch reactor 1, and a transesterification between the carboxylate (1) and the aromatic hydroxy compound is performed to produce carboxylate (3) of the formula R.sup.1 COOR.sup.3 (where R.sup.1 and R.sup.3 are as defined above). After distilling off the by-produced alcohol and unreacted compounds using a distillation column 2, carbonate ester (4) of the formula R.sup.4 O--COOR.sup.5 (where each of R.sup.4 and R.sup.5 independently represents an alkyl group, an alicyclic hydrocarbon group or an aryl alkyl group) is supplied to the batch reactor 1. Then, a transesterification between the carboxylate (3) and the carbonate ester (4) is performed to produce carbonate ester (5) of the formula R.sup.3 O--COOR.sup.6 (where R.sup.3 is as defined above, and R.sup.6 is a substituent selected from the group consisting of R.sup.3, R.sup.4 and R.sup.5). This process enables efficient preparation of carbonate esters.