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Preparation method for synthesizing ethylene carbonate process solid catalyst

A solid catalyst, ethylene carbonate technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as high cost, low activity of solid catalysts, difficult recovery, etc., to reduce production costs , Product after-treatment is simple, high catalytic activity effect

Active Publication Date: 2018-09-28
辽阳安里其科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is aimed at the shortcomings of the solid catalysts used in the current synthesis of ethylene carbonate, such as low activity, difficult recovery, and high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, dissolve dicyandiamide in deionized water, wherein the mass ratio of dicyandiamide to deionized water is 1:20, then the solution is heated to 50°C; graphene oxide is added to the above solution, and stirred under magnetic force Keep under the same conditions for 4 hours; put the above mixture into a water bath, and dry at 60°C; put the obtained solid into a tube furnace, use argon as the carrier gas, and heat up to 500°C at a rate of 5°C / min , and keep it warm for 1 hour to obtain the desired carbon nitride / graphene oxide composite material. Denote it as Cat1.

Embodiment 2

[0025] First, dissolve dicyandiamide in deionized water, wherein the mass ratio of dicyandiamide to deionized water is 1:30, then the solution is heated to 60°C; graphene oxide is added to the above solution, and stirred under magnetic force Keep under the same conditions for 4 hours; put the above mixture into a water bath, and dry at 80°C; put the obtained solid into a tube furnace, use argon as the carrier gas, and heat up to 500°C at a rate of 10°C / min , and keep it warm for 1 hour to obtain the desired carbon nitride / graphene oxide composite material. Denote it as Cat2.

Embodiment 3

[0027] First, dicyandiamide is dissolved in absolute ethanol, wherein the mass ratio of dicyandiamide to absolute ethanol is 1:20, and then the solution is heated to 30°C; graphene oxide is added to the above solution, and the magnetic Keep stirring for 5 hours; put the above mixture in a water bath and dry at 60°C; put the obtained solid in a tube furnace, use argon as the carrier gas, and heat up to 500°C at a rate of 5°C / min. ℃, and keep it warm for 1 hour to obtain the desired carbon nitride / graphene oxide composite material. Recorded as Cat3.

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PUM

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Abstract

The invention relates to a preparation method for synthesizing an ethylene carbonate process solid catalyst. The catalyst is prepared from raw materials, namely graphene oxide and dicyandiamide, through simple procedures of soaking, drying and roasting, then preparation of a carbon nitride / graphene oxide composite material is achieved, and a novel solid catalyst used in an ethylene carbonate synthesis process is prepared. The method is simple to operate, and the obtained solid catalyst can be continuously recycled after being filtered after reactions, and is high in recycling property and lowin preparation cost. When the solid catalyst prepared by using the preparation method is used in a process that ethylene carbonate is prepared from dimethyl carbonate and gylcol ester through exchangesynthesis, a very good catalysis effect can be achieved.

Description

technical field [0001] The invention relates to the field of preparation of solid catalysts, in particular to a preparation method of a solid catalyst used in the process of transesterifying dimethyl carbonate and ethylene glycol to synthesize ethylene carbonate. Background technique [0002] Ethylene carbonate (EC) is an important class of organic chemicals, widely used in organic synthesis, gas separation, electrochemistry, polymer synthesis, printing and dyeing, plastics and other fields. The synthesis methods of ethylene carbonate mainly include phosgene method, transesterification method, urea alcoholysis method, ethylene oxide and carbon dioxide addition method. The phosgene method is prohibited because the phosgene in the raw material is highly toxic, causing serious harm to people and the environment; the urea alcoholysis method is generally not used because the catalyst used is not easy to separate; The efficiency is high and the selectivity is good, but the operat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07D317/38
CPCB01J27/24C07D317/38Y02P20/584
Inventor 柳娜王军杨松吴晶李水薛冰李永昕
Owner 辽阳安里其科技发展有限公司
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