Method for preparing alkylene carbonate

A technology of alkylene carbonate and carbon dioxide, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, organic chemistry, etc., can solve problems such as difficult product separation, low catalyst activity, and easy deactivation , to achieve a good technical effect

Active Publication Date: 2013-05-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that there are low catalyst activity, easy deactivati

Method used

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  • Method for preparing alkylene carbonate
  • Method for preparing alkylene carbonate

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] [Example 1]

[0018] In a glove box, add 20 g of PEG with an average molecular weight of 400, 200 ml of anhydrous tetrahydrofuran, and 1.9 g of metal potassium into a 500 ml three-necked flask, stir and reflux at room temperature for 1 to 4 hours; then add 25 g of tetrahydrofuran swelled Merrified resin (100-200 mesh, crosslinking degree of 2%, loading amount of 0.9mmol Cl / g), reflux reaction at 50-80°C for 6-15 hours. After the reaction is completed, it is cooled, and methanol and unreacted potassium are added. Then pour out the upper liquid, wash sequentially with tetrahydrofuran-hydrochloric acid solution, deionized water, methanol, vacuum dry to constant weight to obtain PS-(CH 2 CH 2 O) 9 -H Microsphere A. Among them, the Merrified resin is the matrix material of the ion exchange resin catalyst and is a copolymer of styrene and divinylbenzene, represented by PS.

[0019] Add 10 grams of PS-(CH 2 CH 2 O) 9 -H microspheres, 200ml of dichloromethane to swell the microsph...

Example Embodiment

[0021] [Example 2]

[0022] Change the resin matrix in [Example 1], use polyalkylene ester, the amount is 5 grams, the loading amount is 2.82mmolCl / g, the other preparation conditions are the same as [Example 1], and finally M-(CH 2 CH 2 O) 9 -P + Bu 3 Br - Microsphere B.

Example Embodiment

[0023] [Example 3]

[0024] In a glove box, add 40 g of PEG with an average molecular weight of 2000, 500 ml of anhydrous tetrahydrofuran, and 0.76 g of metal potassium into a 1000 ml three-necked flask, stir and reflux at 45°C for 1 to 6 hours; then add 10 g of tetrahydrofuran Swelled Merrified resin (100-200 mesh, cross-linking degree of 2%, loading amount of 0.9mmol Cl / g), reflux and react at 50-90°C for 10-20 hours. After the reaction is completed, it is cooled, and methanol and unreacted potassium are added. Then pour out the upper liquid, wash sequentially with tetrahydrofuran-hydrochloric acid solution, deionized water, methanol, vacuum dry to constant weight to obtain PS-(CH 2 CH 2 O) 45 -H Microsphere C.

[0025] Add 10 grams of PS-(CH 2 CH 2 O) 45 -H microspheres, 200ml of dichloromethane to swell the microspheres, then cool to 0℃, slowly add 10ml of phosphorus tribromide dropwise, and react for 4-8 hours; then continue to react at room temperature for 10-15 hours, the r...

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Abstract

The invention relates to a method for preparing alkylene carbonate, and is mainly used for solving the problems that in the prior art, the catalyst is low in activity and easy to inactivate, and the product is hard to separate. The catalyst provided by the invention has the structural formula of M-PEG-Z<+>R3X<->, wherein M is a resin matrix selected from polyalkylene ester, copolymer of phenylethylene and divinyl benzene, polyester, polycarbonic ester, polyurethane or formaldehyde resin; PEG represents a chemical structure with the formula -(CH2CH2O)n-, and n is an integer from 1 to 150; Z is nitrogen, phosphorus or arsenic; R is methyl, ethyl, propyl, n-butyl, phenyl or aryl; and X is fluorine, chlorine, bromine, iodine, acetate, formate or hydrogen oxalate. The problems are better solved with the adoption of the technical scheme, and the method can be applied to industrial production of alkylene carbonate.

Description

technical field [0001] The present invention relates to a kind of method for preparing alkylene carbonate. Background technique [0002] Alkylene carbonates such as ethylene carbonate and propylene carbonate are organic chemical raw materials with a wide range of uses and are widely used as solvents and diluents in industry. Ethylene carbonate can be used as a solvent in textiles, printing, polymer synthesis and electrochemistry, as well as a raw material for cosmetics and medicines and an intermediate for corresponding diols. [0003] Industrially, alkylene carbonate is generally prepared by reacting carbon dioxide with the corresponding alkylene oxide under the action of a catalyst. Many catalysts have been found to have a catalytic effect on this reaction, such as transition metal complexes, main group element complexes, quaternary ammonium salts, quaternary phosphonium salts and alkali metal salts, ionic liquids, supercritical carbon dioxide and other catalytic systems....

Claims

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Application Information

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IPC IPC(8): C07D317/38C07D317/36B01J31/08
Inventor 俞峰萍何文军
Owner CHINA PETROLEUM & CHEM CORP
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