Catalyst and application thereof for synthesizing dimethyl carbonate by transesterification

A technology of dimethyl carbonate and catalyst, applied in the application field of synthesizing dimethyl carbonate, can solve the problems of limiting the production efficiency of dimethyl carbonate, harsh use conditions of the catalyst, restricting the use occasions of the catalyst, etc., and achieves good catalytic effect, The effect of short reaction times and mild conditions

Active Publication Date: 2022-04-22
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use conditions of the catalyst are harsh, and it needs to react under negative pressure and high temperature conditions to obtain a higher yield, which limits the application of the catalyst to a certain extent.
[0008] In summary, the existing solid catalysts applied to the synthesis of dimethyl carbonate generally have problems such as large catalyst consumption, low catalytic efficiency, and long reaction time, which restrict the use of catalysts and limit the production efficiency of dimethyl carbonate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Get the KF / MgO catalyst 0.0176g, methanol 51.2g and ethylene carbonate 17.6g that KF load is 20% and join in the 250ml round bottom flask, after stirring and reacting at 70 ℃ for 0.5 hour, get the product in the bottle and carry out detection and analysis, The analysis results are: the conversion rate of ethylene carbonate is 11.75%, the selectivity and yield of dimethyl carbonate are 97.62% and 11.47%, respectively.

Embodiment 2

[0029] Take KF / CaO catalyst 0.0176g, methanol 51.2g and ethylene carbonate 17.6g with KF load of 20% and join in a 250ml round bottom flask, stir and react at 70°C for 0.5 hour, take the product in the bottle for detection and analysis, analyze The results were: the conversion rate of ethylene carbonate was 62.62%, the selectivity and yield of dimethyl carbonate were 98.56% and 61.72%, respectively.

Embodiment 3

[0031] Take 0.0176g of LiF / CaO catalyst with a LiF load of 20%, 51.2g of methanol and 17.6g of ethylene carbonate into a 250ml round bottom flask, stir and react at 70°C for 0.5 hours, and take the product in the bottle for detection and analysis. The results were: the conversion rate of ethylene carbonate was 72.08%, the selectivity and yield of dimethyl carbonate were 99.33% and 71.60%, respectively.

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PUM

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Abstract

The invention discloses a catalyst for synthesizing dimethyl carbonate by transesterification, which comprises an alkali metal fluoride and a metal oxide, the alkali metal fluoride is loaded on the metal oxide, and the alkali metal fluoride and the metal The mass ratio of oxides is 1:1‑20. In the present invention, the metal oxide is used as the carrier, and the alkali metal fluoride is loaded on the carrier. The active component alkali metal fluoride in the supported solid catalyst has strong basicity, which is beneficial to the transesterification reaction and improves the catalyst performance. Catalytic efficiency shortens the reaction time.

Description

technical field [0001] The invention belongs to the technical field of solid base catalysts, in particular to a catalyst for synthesizing dimethyl carbonate by transesterification and the application of the catalyst in synthesizing dimethyl carbonate. Background technique [0002] Dimethyl carbonate (DMC) is one of the fastest growing green chemicals since the 20th century. Its own multifunctional groups determine that it can react with various organic compounds such as alcohols, phenols, amines, esters and amino alcohols. At the same time it can also be used as a substitute for toxic dimethyl sulfate and phosgene, and because of the high oxygen content (53%) and octane number (105), it can be used as a gasoline additive. [0003] At present, the methods used to synthesize DMC mainly include phosgene method, transesterification method, oxidative carbonylation method, urea alcoholysis method and some new methods. Because the yield of transesterification is high, the reactio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/12C07C69/96C07C68/065
Inventor 杨先贵张彬申小龙王公应
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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