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Patent Searching and Data


Title:
METHOD FOR PREPARING DIALKYL CARBONATE BY MEANS OF UREA ALCOHOLYSIS
Document Type and Number:
WIPO Patent Application WO/2019/148604
Kind Code:
A1
Abstract:
Disclosed is a method for preparing a dialkyl carbonate by means of urea alcoholysis, relating to the field of chemical synthesis, and in particular to the preparation of a dialkyl carbonate. Urea and alkyl monohydric alcohol are subjected, under the condition of normal pressure or reduced pressure at a reaction temperature of 70-150°C, to a reflux reaction for 6-30 hrs while being stirred, by using one or more of metals, such as magnesium, calcium, aluminum, chromium, manganese, iron, cobalt, nickel, copper or zinc, as a main catalyst and one or more compound containing a donor atom, such as nitrogen, phosphorus, oxygen or sulfur, as a promoter, so that a dialkyl carbonate is prepared. The dialkyl carbonate is prepared with high selectivity and high yield at a low reaction temperature under the condition of normal pressure or reduced pressure. The technological process is easy to operate, features high security and low costs, and thus has a good industrial application prospect.

Inventors:
LEI YONGCHENG (CN)
LEI YONGZHONG (CN)
LV QINGHONG (CN)
WANG YU (CN)
Application Number:
PCT/CN2018/079330
Publication Date:
August 08, 2019
Filing Date:
March 16, 2018
Export Citation:
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Assignee:
LEI YONGCHENG (CN)
LEI YONGZHONG (CN)
International Classes:
C07C68/00; C07C69/96
Foreign References:
CN102909076A2013-02-06
CN104549439A2015-04-29
CN1431190A2003-07-23
Attorney, Agent or Firm:
CHENGDU CENTRAL ASIA PATENT AGENCY CO., LTD (CN)
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