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:
Apr. 03, 2007
Filed:
May. 28, 2004
Hiroshige Okamoto, Okayama, JP;
Ken Someya, Kurashiki, JP;
Hiroshige Okamoto, Okayama, JP;
Ken Someya, Kurashiki, JP;
Asahi Kasei Chemicals Corporation, Tokyo, JP;
Abstract
A process for producing an alkylene carbonate, which comprises reacting an alkylene oxide with carbon dioxide in the presence of a catalyst in a reactor to obtain a reaction mixture containing an alkylene carbonate, the reactor communicating with a process-side channel of a heat exchanger through a piping to form a circulation circuit, wherein the process is characterized in that it further comprises, during or after the reaction, flowing a process liquid through the circulation circuit including the reactor and the process-side channel of the heat exchanger while flowing a heat exchange medium having a temperature of from 140° C. to 200° C. through the heat exchange-side channel of the heat exchanger, thereby maintaining the inner temperature of the process-side channel at 135° C. to 200° C.