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A kind of solid catalyst for synthesizing ethylene glycol and preparation method thereof

A technology of solid catalyst and ethylene glycol, which is applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., which can solve the difficulties of recovery, high catalyst cost and cumbersome preparation process and other problems, to achieve the effect of reducing diffusion resistance, good immobilization effect, and high catalytic activity

Inactive Publication Date: 2017-07-14
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is aimed at the defects of high catalyst cost, cumbersome preparation process and difficult recovery of the current ethylene carbonate hydrolysis synthesis ethylene glycol reaction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Solid graphene oxide is added in the beaker that deionized water is housed, and the mass ratio of deionized water and graphene oxide is 100:1, then beaker is put into ultrasonic instrument, ultrasonic 60 minutes under the power of 180W; 2-Chloroethylamine was added to the above-mentioned beaker under vigorous stirring, wherein the mass ratio of graphene oxide to 2-Chloroethylamine was 2:1, followed by magnetic stirring overnight at room temperature; Filter and wash with deionized water to obtain the desired solid catalyst. Denote it as Cat1.

Embodiment 2

[0023] Solid graphene oxide is added in the beaker that deionized water is housed, make the mass ratio of deionized water and graphene oxide be 200:1, then beaker is put into ultrasonic instrument, ultrasonic 60 minutes under the power of 240W; 3-Chloropropylamine was added to the above-mentioned beaker under vigorous stirring, wherein the mass ratio of graphene oxide to 3-Chloropropylamine was 5:1, and then magnetically stirred overnight at room temperature; then the obtained material was filtered, and then Wash with deionized water to obtain the desired solid catalyst. Denote it as Cat2.

Embodiment 3

[0025] Solid graphene oxide is added in the beaker that deionized water is housed, and the mass ratio of deionized water and graphene oxide is 150:1, then beaker is put into ultrasonic instrument, ultrasonic 30 minutes under the power of 120W; 3-bromopropylamine was added to the above-mentioned beaker under vigorous stirring, wherein the mass ratio of graphene oxide to 3-bromopropylamine was 3:1, followed by magnetic stirring overnight at room temperature; then the obtained material was filtered, and then Wash with deionized water to obtain the desired solid catalyst. Recorded as Cat3.

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PUM

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Abstract

The invention relates to a solid catalyst for synthesizing ethylene glycol and a preparation method thereof. In the method, graphene oxide and halogenated alkylamine are used as raw materials, and amine groups are grafted onto the surface of graphene oxide through a covalent bond, thereby obtaining A highly efficient solid catalyst. The method is simple to operate, and the obtained solid catalyst can be continuously recycled after simple treatment, has a long service life, is pollution-free, and greatly reduces production costs. The catalyst prepared by the invention is used in the reaction of hydrolyzing ethylene carbonate to synthesize ethylene glycol, and a good catalytic effect is obtained, the conversion rate of ethylene carbonate is as high as over 95%, and the selectivity of ethylene glycol is 100%.

Description

technical field [0001] The invention relates to the field of preparation of solid catalysts, in particular to a solid catalyst for hydrolyzing ethylene carbonate to synthesize ethylene glycol and a preparation method thereof. Background technique [0002] Ethylene glycol (EG) is an important organic chemical raw material widely used in the production of polyester fibers, antifreeze, polyester plastics, unsaturated resins, lubricants, plasticizers, nonionic surfactants and explosives. At present, the main method for industrially synthesizing EG is direct hydration of ethylene oxide (EO), which has disadvantages such as long process flow, high water ratio, high energy consumption, and low selectivity (<90%). The new processes that have been developed include EO catalytic water synthesis method, ethylene carbonate method, synthesis gas synthesis method, etc. Among them, the ethylene carbonate method is considered to be one of the most industrialized production processes. Thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02C07C31/20C07C29/12
CPCY02P20/52Y02P20/584
Inventor 薛冰吴晶柳娜李永昕
Owner CHANGZHOU UNIV