Method for catalytic synthesis of diamyl carbonate and methyl amyl carbonate

A technology of methyl pentyl carbonate and dipentyl carbonate, applied in the field of catalytic synthesis, can solve problems such as multiple safety, hidden dangers, environmental pollution, etc., and achieve the effects of simple preparation method, mild reaction conditions and non-toxic raw materials

Inactive Publication Date: 2007-08-01
JIANGSU POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the traditional methods for synthesizing dialkyl carbonates use highly toxic phosgene as carbonylation reagents, which not only brings more safety hazards to the production process, but also causes many problems such as environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The total volume of dimethyl carbonate (analytically pure) and n-pentanol is 30 mL, the molar ratio is 1:1, sodium hydroxide is used as the catalyst, the consumption is 1% of the raw material mass, the reaction temperature is 70° C., and the reaction time is 1 hour.

[0010] The conversion rate of dimethyl carbonate was 35.3%, the selectivity to methyl pentyl carbonate was 94.7%, and the selectivity to diamyl carbonate was 5.3%.

Embodiment 2

[0012] The total volume of dimethyl carbonate (analytically pure) and n-amyl alcohol is 30mL, the molar ratio is 1:1, sodium hydroxide is used as the catalyst, the consumption is 1% of the raw material mass, the reaction temperature is 70°C, and the reaction time is 3 hours.

[0013] The conversion rate of dimethyl carbonate was 37.6%, the selectivity to methyl pentyl carbonate was 95.7%, and the selectivity to diamyl carbonate was 4.3%.

Embodiment 3

[0015] The total volume of dimethyl carbonate (analytically pure) and n-pentanol is 30 mL, the molar ratio is 1:1, sodium hydroxide is used as the catalyst, the consumption is 1% of the raw material mass, the reaction temperature is 70° C., and the reaction time is 5 hours.

[0016] The conversion of dimethyl carbonate was 41%, the selectivity to methyl pentyl carbonate was 96.1%, and the selectivity to diamyl carbonate was 3.9%.

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Abstract

The invention discloses a catalyzing and synthesizing method of ethyl propyl carbonate and methyl amyl carbonate, which is characterized by the following: selecting alkaline metal or alkaline metal salt or hydroxide as catalyst as well as zeolite molecular sieve or active charcoal immersed by alkaline metal or alkaline metal salt or hydroxide; adopting DEC and normal propyl alcohol as raw material; improving the transmitting rate of DMC to 100% and selectivity of ethyl propyl ester carbonate to 96.1%.

Description

technical field [0001] The invention relates to a catalytic synthesis method, in particular to a method for catalytic synthesis of dipentyl carbonate and methyl pentyl carbonate. Background technique [0002] Dialkyl carbonates are an important class of carbonates with wide application prospects. It contains active reactive groups such as alkyl, alkoxy, carbonyl and alkylcarbonyl in its molecule, so it can react with alcohols, phenols, amines and esters, and can be used as an alkylation, carbonylation and alkylcarbonylation reagent , is an important organic synthesis intermediate, widely used in medicine, pesticide and other industries; secondly, dialkyl is a solvent with excellent performance, and has good compatibility with many solvents, and can be used as paint, cellulose and resin and other solvents are used; for batteries with carbon materials as the anode, if the electrolyte is composed of 50-90wt% dimethyl carbonate (Dimethylcarbonate, DMC for short) and diethyl car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/96C07C68/06
Inventor 李永昕薛冰郭玉华李军奇
Owner JIANGSU POLYTECHNIC UNIVERSITY
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