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Method for preparing vinyl carbonate by epoxy ethane and carbon dioxide

A technology of ethylene carbonate and ethylene oxide, which is used in the field of preparing ethylene carbonate from ethylene oxide and carbon dioxide, which can solve the problems of activity decline and other problems

Active Publication Date: 2013-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the problem that the activity of the catalyst in the prior art drops rapidly in the presence of water, and a new method for preparing ethylene carbonate from ethylene oxide and carbon dioxide is provided

Method used

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  • Method for preparing vinyl carbonate by epoxy ethane and carbon dioxide
  • Method for preparing vinyl carbonate by epoxy ethane and carbon dioxide
  • Method for preparing vinyl carbonate by epoxy ethane and carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] 0.06 g ZnCl 2 And 0.44 grams of TPPMS (monosulfotriphenylphosphine, structural formula (C 6 h 5 ) 2 PC 6 h 4 SO 3 H) add in 300 milliliter autoclave, then add 50.0 gram oxirane and 150.0 gram water (the weight ratio of catalyst and oxirane is 0.01, the weight ratio of water and oxirane is 3), charge into 1.0 MPa CO 2 , heated up to 120°C, and filled with CO 2 , maintaining the reaction pressure at 2.0 MPa, and after reacting for 3 hours, it was measured that the conversion rate of ethylene oxide was 48.9%, the selectivity of ethylene carbonate was 93.7%, and the yield of ethylene carbonate was 45.8%.

Embodiment 2～11

[0014] The types and amounts of transition metal salts and sulfonated phosphine ligands used were changed, and the remaining conditions were the same as in [Example 1]. The results obtained are shown in Table 1.

[0015] Among them, TPPDS is bis-sulfotriphenylphosphine, structural formula: C 6 h 5 P(C 6 h 4 SO 3 h) 2 ; TPPTS is three sulfotriphenylphosphine, structural formula: (C 6 h 4 SO 3 h) 3 P; BPTBP is bis(3-sodium phenylsulfonate)-4-tert-butylphenylphosphine, structural formula C 10 h 13 P(C 6 h 4 SO 3 Na) 2 ; PBTBP is 3-sodium phenylsulfonate-bis(4-tert-butylphenylphosphine), structural formula (C 10 h 13 ) 2 PC 6 h 4 SO 3 Na.

[0016] Table 1

[0017]

[0018] C EO %: conversion rate of ethylene oxide

[0019] S EC %: Selectivity of ethylene carbonate

[0020] x EC %: Yield of ethylene carbonate

Embodiment 12～15

[0022] With [embodiment 4], just change the consumption of catalyst and the consumption of water, the obtained result is shown in Table 2.

[0023] Table 2

[0024]

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Abstract

The invention relates to a method for preparing vinyl carbonate by epoxy ethane and carbon dioxide, which mainly solves the problem of the prior art that the activity of a catalyst is quickly reduced when water exists. Aiming at well solving the problem, the method adopts the technical scheme that the epoxy ethane and the carbon dioxide are used as raw materials, and the reaction raw materials come into contact with the catalyst to generate the vinyl carbonate when the mass ratio of the epoxy ethane to the water is (0.01-5):1, the reaction temperature is 50 to 200 DEG C, the pressure of the carbon dioxide is 0.1 to 10.0 MPa, and the mass ratio of the catalyst to the epoxy ethane is (0.001-0.1):1; and the catalyst comprises the following components in parts by weight: (a) 10 to 80 parts of transition metal salt, and (b) 20 to 90 parts of phosphine ligand containing sulfonic acid groups, wherein the structural formula of the phosphine ligand containing the sulfonic acid groups is CaHbPc(SO3R)d, a is 14 to 30, b is 12 to 32, c is 1 to 2, d is 1 to 3, and R is H, Na, K or Cs. The method can be used for the industrial production of the vinyl carbonate prepared by the epoxy ethane and the carbon dioxide.

Description

technical field [0001] The invention relates to a method for preparing ethylene carbonate from ethylene oxide and carbon dioxide. Background technique [0002] Ethylene carbonate is an excellent solvent and fine chemical intermediate, and a potential basic raw material for organic chemical industry. At the same time CO 2 is a greenhouse gas, how to effectively fix it has become one of the most challenging issues in this century, and through ethylene oxide and CO 2 Reactive synthesis of ethylene carbonate is one of the good fixation methods. With the recent increasing attention to the co-production of dimethyl carbonate and ethylene glycol using ethylene carbonate as a raw material, the fixation of CO by cyclic carbonate 2 approach has also received increasing attention. [0003] Most of the methods for the production of cyclic carbonates reported at present are binary homogeneous catalysts using Lewis acid metal compounds and Lewis bases, wherein the Lewis acid metal com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D317/38B01J31/30B01J31/28B01J31/26
Inventor 陈梁锋何文军
Owner CHINA PETROLEUM & CHEM CORP
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