Catalyst for preparing dimethyl carbonate from epoxide, methanol and carbon dioxide, and preparation method and application thereof

A technology of dimethyl carbonate and epoxide, which is used in the catalyst, preparation method and application field for producing dimethyl carbonate from epoxide, methanol and carbon dioxide, can solve the problems of no research reports, etc., and achieve application prospects Compatible with wide range, easy large-scale application, and simple recycling

Active Publication Date: 2019-04-19
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst composed of metal species and HZSM-5 molecular sieve is applied to the three-component synthesis of dimethyl carbonate, which is effective for both cycloaddition and alcoholysis reactions, and there is no relevant research report so far

Method used

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  • Catalyst for preparing dimethyl carbonate from epoxide, methanol and carbon dioxide, and preparation method and application thereof
  • Catalyst for preparing dimethyl carbonate from epoxide, methanol and carbon dioxide, and preparation method and application thereof
  • Catalyst for preparing dimethyl carbonate from epoxide, methanol and carbon dioxide, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Prepare the concentration of zinc ion to be 0.2g·ml -1 zinc nitrate solution, add HZSM-5 molecular sieve and impregnate for 12h, wherein ZSM-5 molecular sieve has a silicon-aluminum ratio of 70 and a specific surface area of ​​700m 2 g -1 , the particle size is 10000nm, and the average pore size is 0.5nm. Then dry at 80° C. for 2 hours, grind the obtained solid, and roast at 250° C. for 9 hours to obtain the desired modified molecular sieve catalyst. The mass percent content of zinc oxide in the prepared modified ZSM-5 molecular sieve catalyst is 0.5%.

[0034] The catalyst is used in the reaction to produce dimethyl carbonate. The reaction raw materials are propylene oxide and methanol, accounting for 30% of the total volume of the reactor, the molar ratio of epoxide and methanol is 5, tetraethylammonium chloride is added in the reaction system, and the molar ratio of this substance to propylene oxide is 0.2. The molar ratio of the molar number of metal components ...

Embodiment 2－11

[0036] On the basis of Example 1, the catalyst composition, preparation process and reaction conditions were adjusted in Examples 2-11. See Attached Table 1 and Attached Table 2 for specific data. The reaction conditions and results are shown in Table 3.

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Abstract

A catalyst for preparing dimethyl carbonate from epoxide, methanol and carbon dioxide comprises 0.005-20 wt% of a metal oxide, and the balance of an HZSM-5 molecular sieve. The catalyst is directly used in a one-pot reaction of CO2, methanol and epoxide to prepare dimethyl carbonate, and has the advantages of simple reaction steps, low cost and broad application prospect.

Description

technical field [0001] The invention relates to a catalyst for preparing dimethyl carbonate from epoxide, methanol and carbon dioxide, as well as its preparation method and application. Background technique [0002] Carbon dioxide is an environmentally friendly carbon resource, which is abundant, non-toxic, non-flammable, cheap and easy to obtain, and can be recycled. Whether from the perspective of environmental protection or renewable resource utilization, CO 2 It is of great significance to study the immobilization and chemical transformation. In organic synthesis, CO 2 It can partially replace traditional toxic compounds such as CO and phosgene for the synthesis of organic carbonates, polycarbonates and urea, etc., and these three compounds have been industrialized at present. [0003] Organic carbonates are a class of green chemicals with high boiling point, low vapor pressure, and low toxicity. They are widely used in many fields such as organic solvents, detergents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/46C07C68/04C07C69/96
CPCC07C68/04B01J29/40B01J29/405B01J29/46C07C69/96Y02P20/141
Inventor 宋清文韩丽华刘平张侃吉可明
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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