Title:
METHOD FOR PREPARING DIMETHYL CARBONATE
Document Type and Number:
WIPO Patent Application WO/2021/114092
Kind Code:
A1
Abstract:
Disclosed is a method for preparing dimethyl carbonate, comprising the following steps: contacting a raw material containing ethylene carbonate and methanol with a catalyst, and reacting to obtain the dimethyl carbonate. The catalyst comprises an ionic liquid. The ionic liquid comprises an anion and a cation. The cation has the structure represented by formula I or formula II. According to the method for preparing dimethyl carbonate, a series of strongly basic ionic liquids developed for transesterification of ethylene carbonate and methanol are synthesized into dimethyl carbonate and ethylene glycol, and show extremely high reactivity. Even a catalyst having the content of 0.3 wt% can reach reaction equilibrium after reacting for 5 min at 68-70ºC, and has a certain catalytic activity even at 0ºC.
Inventors:
SHI LEI (CN)
GUO JIANJUN (CN)
LI XIN (CN)
LIU MINGYU (CN)
GUO JIANJUN (CN)
LI XIN (CN)
LIU MINGYU (CN)
Application Number:
PCT/CN2019/124323
Publication Date:
June 17, 2021
Filing Date:
December 10, 2019
Export Citation:
Assignee:
UNIV SHENYANG CHEMICAL TECH (CN)
SHANDONG SHIDA SHENGHUA CHEM GROUP CO LTD (CN)
SHANDONG SHIDA SHENGHUA CHEM GROUP CO LTD (CN)
International Classes:
C07C68/06; B01J31/02; C07C69/96
Foreign References:
| CN109704968A | 2019-05-03 | |||
| CN109704968A | 2019-05-03 | |||
| CN103641720A | 2014-03-19 | |||
| CN101735064A | 2010-06-16 | |||
| CN103467435A | 2013-12-25 | |||
| CN103521263A | 2014-01-22 |
Other References:
See also references of EP 3950660A4
Attorney, Agent or Firm:
PERIODIC LAW FIRM (CN)
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