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:
May. 25, 2021
Filed:
Aug. 10, 2018
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Keisuke Shimokawa, Tokyo, JP;
Hidefumi Harada, Tokyo, JP;
Takehiko Isobe, Tokyo, JP;
Hongyu Liu, Tokyo, JP;
MITSUBISHI GAS CHEMICAL COMPANY, INC, Tokyo, JP;
Abstract
The present application addresses the problem of providing a method for efficiently producing a dialkyl carbonate. The problem can be solved by a method for producing a dialkyl carbonate by reacting urea and at least one alkyl carbamate with an aliphatic alcohol in the presence of a catalyst, the method including introducing a gas for expelling ammonia generated by the reaction into a reactor in which the reaction is being conducted and discharging the ammonia generated in the reactor and the introduced gas, the reaction being conducted so that the gas introduction satisfies relationship (1).52.0<(()×22400+/17.03×22400)/<91.0  (1)(In formula (1), A, B, L, and M are as defined above.)