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Biological enzyme catalyst for preparing dimethyl carbonate and preparation method thereof

A technology of dimethyl carbonate and biological enzyme is applied in the field of preparation of dimethyl carbonate, biological enzyme catalyst and its preparation, which can solve the problems of catalyst deactivation and the like, and achieve the effect of high catalytic efficiency and environmental friendliness.

Inactive Publication Date: 2014-01-22
SHENZHEN LEVEKING BIOLOGY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the early 1980s, the EniChem company in Italy realized the commercialization of the synthesis of DMC by oxidative carbonylation of methanol using CuCl as a catalyst. This is the first industrialized non-phosgene synthesis of DMC, and it is also the most widely used. process, the defect of this process is that the deactivation of the catalyst is serious when the conversion rate is high, so its single-pass conversion rate is only 20%
The application of bioenzyme catalysts with ionic liquid and lipase as the main components in the preparation of dimethyl carbonate has not been reported

Method used

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  • Biological enzyme catalyst for preparing dimethyl carbonate and preparation method thereof
  • Biological enzyme catalyst for preparing dimethyl carbonate and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] The reactants methanol and propylene carbonate were sequentially added to the reaction device, the molar ratio of methanol to propylene carbonate was 16:1, and then the biological enzyme catalyst was added, and then water was added, and the water content was 1% (based on the weight of the ester, w / w), Stirring for transesterification reaction, the reaction temperature is 55°C, the reaction time is 72h, and the reaction pressure is 0.1Mpa. The ionic liquid in the biological enzyme catalyst is 1-ethyl-3-methylimidazole hexafluorophosphate, and the ionic liquid is 2ml / g (based on the weight of the ester, v / w); the lipase in the biological enzyme catalyst is Penicillium expanding lipase Add 0.003 g Penicillium expanded lipase per ml of ionic liquid. The reaction solution was used for dimethyl carbonate content analysis, and the conversion rate of propylene carbonate was calculated as 25% from the measured amount of carbon ester dimethyl.

Embodiment 2

[0034] The reactants methanol and propylene carbonate were sequentially added to the reaction device, the molar ratio of methanol to propylene carbonate was 16:1, and then the biological enzyme catalyst was added, and then water was added, and the water content was 1% (based on the weight of the ester, w / w), Stirring for transesterification reaction, the reaction temperature is 55°C, the reaction time is 72h, and the reaction pressure is 0.1Mpa. The ionic liquid in the biological enzyme catalyst is 1-ethyl-3-methylimidazole hexafluorophosphate, and the ionic liquid is 2ml / g (based on the weight of the ester, v / w); the lipase in the biological enzyme catalyst is Penicillium expanding lipase , Add 0.01 g Penicillium expanded lipase per ml of ionic liquid. The reaction solution was used for dimethyl carbonate content analysis, and the conversion rate of propylene carbonate was calculated as 92% based on the measured amount of carbon ester dimethyl carbonate.

Embodiment 3

[0036] The reactants methanol and propylene carbonate were sequentially added to the reaction device, the molar ratio of methanol to propylene carbonate was 16:1, and then the biological enzyme catalyst was added, and then water was added, and the water content was 1% (based on the weight of the ester, w / w), Stirring for transesterification reaction, the reaction temperature is 55°C, the reaction time is 72h, and the reaction pressure is 0.1Mpa. The ionic liquid in the biological enzyme catalyst is 1-ethyl-3-methylimidazole hexafluorophosphate, and the ionic liquid is 2ml / g (based on the weight of the ester, v / w); the lipase in the biological enzyme catalyst is Penicillium expanding lipase , Add 0.03 g Penicillium expanded lipase per ml of ionic liquid. The reaction solution was used for dimethyl carbonate content analysis, and the conversion rate of propylene carbonate was 85% calculated from the measured amount of carbon ester dimethyl.

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Abstract

The invention discloses a biological enzyme catalyst for preparing dimethyl carbonate and a preparation method thereof. The biological enzyme catalyst comprises ionic liquid and lipase, wherein every milliliter of ionic liquid contains 0.003-0.75g of lipase. By adopting the biological enzyme catalyst taking the ionic liquid and lipase as main components, the catalysis efficiency in a process of preparing dimethyl carbonate through a catalytic esterification reaction is high, and the biological enzyme catalyst can be recycled, thereby being environment-friendly.

Description

Technical field [0001] The present invention relates to the field of biochemical industry, in particular to a biological enzyme catalyst for preparing dimethyl carbonate and a preparation method thereof. Background technique [0002] Dimethyl Carbonate (DMC), DMC is a colorless, transparent, slightly odorous, slightly sweet liquid at room temperature, hardly soluble in water, but can be mixed with almost all organic solvents such as alcohols, ethers, ketones, etc. Melt. DMC has very low toxicity. It was listed as a non-toxic product in Europe in 1992. It is an environmentally friendly chemical raw material that meets the requirements of modern clean technology. Therefore, the synthesis technology of DMC has received extensive attention from the chemical industry at home and abroad (JHClements, Ind . Eng. Chem. Res., 42(2003): 663; S. Fukuoka et al., Green Chem. 5(2003): 497; J. Bayarydon et al., Angew. Chem. Int. Ed., 46( 2007): 5971). [0003] The original production method of ...

Claims

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Application Information

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IPC IPC(8): C12N9/96C12N9/20
CPCC12N9/20C12N9/96C12P7/24C12Y301/01003
Inventor 张海波郭宏涛周晓海王剑英兰瑛
Owner SHENZHEN LEVEKING BIOLOGY ENG