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Process for synthesizing methyl carbonate by alcoholysis of methanol and urea

A technology of dimethyl carbonate and urea alcohol, which is applied in the field of organic chemical synthesis to achieve the effects of low production cost, small equipment investment and simple reaction process

Inactive Publication Date: 2005-01-26
EAST CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned system has only about 22% yield when carried out in batch kettle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 100g methanol, 3.4g catalyst and 8.5g urea to the high pressure reactor, the catalyst is Et 3 NHCl-AlCl 3 , under stirring at 120°C, reacted for 6 hours, cooled, and distilled off the reaction liquid mixture to obtain 3.33 g of product dimethyl carbonate.

[0020] According to GC analysis, the yield of dimethyl carbonate was 25.96% based on urea.

Embodiment 2

[0022] Add 100 g of methanol, 7.0 g of catalyst and 16.5 g of urea into the high pressure reactor, the catalyst is (ph)Et 2 NHCl-FeCl 3 , under stirring at 150° C., reacted for 4 hours, cooled, and distilled off the reaction liquid mixture to obtain 6.22 g of product dimethyl carbonate.

[0023] According to GC analysis, the yield of dimethyl carbonate was 25.15% based on urea.

Embodiment 3

[0025] Add 100g of methanol, 1.7g of catalyst and 5.0g of urea into the high pressure reactor, the catalyst is OcEt 2NHOOCCH 3 -CuCl 2 , where 0c represents octyl, reacted for 4 hours at 180° C. under stirring, cooled, and distilled off the reaction liquid mixture to obtain 1.93 g of product dimethyl carbonate.

[0026] According to GC analysis, the yield of dimethyl carbonate was 25.74% based on urea.

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PUM

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Abstract

The invention discloses a process for synthesizing methyl carbonate from alcoholysis of methanol and urea in a high pressure reactor, wherein the catalyst is a amine salt type ionic liquid having a molecular formula of R1R2R3NHX-MaXb, the raw material methanol and urea are subject to alcoholysis reaction and methyl carbonate is synthesized in one step.

Description

technical field [0001] The invention relates to a method for synthesizing dimethyl carbonate by alcoholysis of methanol and urea, which belongs to the technical field of organic chemical synthesis. Background technique [0002] Dimethyl carbonate (DMC) is an important carbonyl and methylation reagent to replace highly toxic dimethyl sulfate and phosgene, and is an intermediate for the synthesis of high carbon chain carbonates and carbamates. It can also be used in fuel to boost its octane rating. Dimethyl carbonate is usually prepared by oxidative carbonylation of carbon monoxide, oxygen and methanol with copper and palladium compounds. This method has the disadvantages of high raw material cost, large investment in equipment, serious corrosion of equipment, toxicity and explosiveness of carbon monoxide, and the like. In recent years, people have begun to use carbon dioxide as a raw material to synthesize dimethyl carbonate. Many researchers use ...

Claims

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Application Information

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IPC IPC(8): C07C68/00C07C69/96
Inventor 单永奎蔡清海吕丽莉金超
Owner EAST CHINA NORMAL UNIVERSITY
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