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Method for preparing ethylene carbonate from ethylene oxide and carbon dioxide

A technology of ethylene carbonate and carbon dioxide, applied in chemical instruments and methods, organic chemistry, chemical/physical processes, etc., can solve the problems of easy loss of active components and low catalyst activity, and achieve the effect of good stability and high activity

Active Publication Date: 2016-09-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is the problem of low catalyst activity and easy loss of active components in the prior art, 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 ethylene carbonate from ethylene oxide and carbon dioxide
  • Method for preparing ethylene carbonate from ethylene oxide and carbon dioxide
  • Method for preparing ethylene carbonate from ethylene oxide and carbon dioxide

Examples

Experimental program
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Embodiment 1

[0018] In a 1000ml beaker, add 24.3g Cu(NO 3 ) 2 300 ml of aqueous solution, then add SiO 2 Carrier 100.0 g (Degussa, Aerisol 200, specific surface area 194 m 2 / gram) and 34.2 grams of urea, under stirring, be warming up to 90 DEG C, and keep 2 hours, filter then, after washing 3 times with deionized water, spend the night in 120 DEG C of oven, the solid of gained is called A1. Determined by ICP-AES, where Cu is CuSiO 3 The weight ratio accounting for A1 is 15.8%.

Embodiment 2

[0020] With [Example 1], only Cu(NO 3 ) 2 The dosage is 58.5 g, SiO 2 The carrier is Degussa OX50 with a specific surface area of ​​50 meters 2 / gram, the consumption of urea is 82.7 grams, be heated up to 80 ℃ and keep 9 hours, the solid obtained is called A2. Determined by ICP-AES, where Cu is CuSiO 3 The weight ratio accounting for A2 is 38.2%.

Embodiment 3

[0022] With [Example 1], only Cu(NO 3 ) 2 The dosage is 6.72 g, SiO 2 The carrier is Silica-1 with a specific surface area of ​​526 meters 2 / gram, the consumption of urea is 9.5 grams, and the solid of gained is called A3. Determined by ICP-AES, where Cu is CuSiO 3 Accounting for the weight ratio of A3 is 4.5%.

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Abstract

The present invention relates to a method for preparing ethylene carbonate by ethylene oxide and carbon dioxide, and mainly solves the problem that catalyst activity is low and the active ingredient is easy to lose in the prior art. According to the present invention, ethylene oxide and carbon dioxide are used as raw materials, and under the conditions that the reaction temperature is 50-200 DEG C, the pressure of carbon dioxide is 0.1-10.0 MPa, and the mass ratio of the catalyst and ethylene oxide is (0.001-1):1, the reaction raw materials are in contact with the catalyst to generate ethylene carbonate; wherein the catalyst comprises the following components by weight: a component A including 10-80 parts of metal silicate loaded on SiO2 carrier, wherein the weight of the metal silicate is 1-50% of total weight of the component A; and a component B including 20-90 parts of SiO2 grafted with silicate alkyl ester CaHbXcSi(OR)3; wherein a=3-23, b=7-33, c=1-3, X is N, P or S, R is -CH3 or -CH2CH3. The technical solution that the weight ratio of the grafted silicate alkyl ester and SiO2 is (0.002-0.15):1 solves the problem well, and the method can be used in the industrial production of ethylene carbonate from ethylene oxide and 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 Patents(China)
IPC IPC(8): C07D317/38B01J31/28B01J31/26
Inventor 陈梁锋何文军
Owner CHINA PETROLEUM & CHEM CORP
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