Resin catalyst for preparing alkylene carbonate

An alkylene carbonate and catalyst technology, applied in the field of resin catalysts, can solve the problems of difficult product separation, easy deactivation, low catalyst activity, etc., and achieve the effect of good technical effect

Inactive 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 deactivation, and difficult product separation problems in the prior art, and a new resin catalyst for the preparation of alkylene carbonate is provided

Method used

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  • Resin catalyst for preparing alkylene carbonate
  • Resin catalyst for preparing alkylene carbonate

Examples

Experimental program
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Effect test

Embodiment 1

[0019] In the glove box, 20 grams of PEG with an average molecular weight of 400, 200 milliliters of anhydrous tetrahydrofuran, and 1.9 grams of metal potassium were added to a 500 milliliter three-necked flask, and stirred and refluxed at room temperature for 1 to 4 hours; Merrified resin (100-200 mesh, 2% cross-linking degree, 0.9 mmol Cl / g loading capacity), reflux reaction at 50-80° C. for 6-15 hours. Cool after the reaction, and add methanol and unreacted potassium. Subsequently, the upper liquid was poured out, washed with tetrahydrofuran-hydrochloric acid solution, deionized water, and methanol successively, and dried in vacuo to constant weight to obtain PS-(CH 2 CH 2 O) 9 -H microspheres A. Among them, the Merrified resin is the matrix material of the ion exchange resin catalyst, which is a copolymer of styrene and divinylbenzene, represented by PS.

[0020] Add 10 grams of PS-(CH 2 CH 2 O) 9 -H microspheres, 200 ml of dichloromethane to swell the microspheres,...

Embodiment 2

[0023] Change the resin matrix in [Example 1], use polyalkylene ester, the dosage is 5 grams, the load is 2.82mmolCl / g, the rest of the preparation conditions are the same as [Example 1], and finally M-(CH 2 CH 2 O) 9 -P + Bu 3 Br - Microspheres B.

Embodiment 3

[0025] In the glove box, add 40 grams of PEG with an average molecular weight of 2000, 500 milliliters of anhydrous tetrahydrofuran, and 0.76 grams of metal potassium into a 1000 milliliter three-neck flask, stir and reflux at 45 ° C for 1 to 6 hours; then add 10 grams of tetrahydrofuran The swollen Merrified resin (100-200 mesh, 2% cross-linking degree, 0.9 mmol Cl / g load) is refluxed at 50-90° C. for 10-20 hours. Cool after the reaction, and add methanol and unreacted potassium. Subsequently, the upper liquid was poured out, washed with tetrahydrofuran-hydrochloric acid solution, deionized water, and methanol successively, and dried in vacuo to constant weight to obtain PS-(CH 2 CH 2 O) 45 -H microspheres C.

[0026] Add 10 grams of PS-(CH 2 CH 2 O) 45 -H microspheres, 200 ml of dichloromethane to swell the microspheres, then cool to 0°C, slowly add 10 ml of phosphorus tribromide dropwise, react for 4 to 8 hours; then continue to react at room temperature for 10 to 15 ...

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Abstract

The invention relates to a resin catalyst 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 resin 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, polycarbonate, 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. With the adoption of the technical scheme, the problems are better solved; and the resin catalyst can be applied to industrial production of alkylene carbonate.

Description

technical field [0001] The invention relates to a resin catalyst 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. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/08C07D317/38
Inventor 俞峰萍何文军
Owner CHINA PETROLEUM & CHEM CORP
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