Macroporous resin catalyst for preparing alkyl carbonate

A technology of alkylene carbonate and catalyst, applied in the field of macroporous resin catalyst, can solve the problems of rapid activity decline and low catalyst activity, etc.

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

[0009] The technical problem to be solved by the present invention is the problem of low catalyst activity and rapid decline in activity in the prior art, and a new macroporous resin catalyst for the preparation of alkylene carbonate is provided

Method used

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  • Macroporous resin catalyst for preparing alkyl carbonate
  • Macroporous resin catalyst for preparing alkyl carbonate
  • Macroporous resin catalyst for preparing alkyl carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 58.0 grams of styrene, 0.6 grams of divinylbenzene, 30 grams of polystyrene and 0.6 grams of benzoyl peroxide initiator in a 500 milliliter three-necked flask, and stir for 2.0 hours at 60°C; then add 2.8 grams of multi-walled carbon Nanotubes, continue stirring for 1 hour for pre-polymerization. 260 mL of deionized water in which 2.5 g of polyvinyl alcohol had been dissolved was added. Adjust the stirring speed, while gradually raising the temperature to 80°C, and react for 5 hours; then raise the temperature to 90°C, react for 5 hours, and finally raise the temperature to 98°C, and react for 6 hours. After the reaction, pour out the upper liquid, wash with 85°C hot water, then wash with cold water, then filter, put in an oven to dry at 80°C, sieve, and collect composite microspheres with a particle size within the range of 0.35 to 0.60 mm a.

[0027] Chloromethylation of composite microspheres: In a 500-ml three-necked flask, add 50 grams of composite microspher...

Embodiment 2

[0030] In a 500 ml three-necked flask, add 8 grams of the composite chlorine sphere A obtained in [Example 1], 500 ml of chloroform, 45.0 grams of chlorodiphenylphosphine and 4.0 grams of metal lithium flakes, stir at room temperature for 40 hours, and the reaction ends Afterwards, the mother liquor was removed by filtration, washed with methanol, chloroform / methanol (volume ratio 2 / 3, 3 / 1, 9 / 1), and pure chloroform, and dried at 100°C for 8 hours under vacuum to obtain diphenylphosphine-substituted Composite microspheres A2.

Embodiment 3

[0032]Add monomer mixture solution (60.0 gram styrene, 1.7 gram divinylbenzene, 60 gram polystyrene, 1.6 gram multi-walled carbon nanotube and 1.0 gram benzoyl peroxide containing initiator in 500 milliliters of three-necked flasks, The solution was first stirred and reacted at 70°C for 0.5 hours), started the agitator, added a mixed solution of 200 milliliters of deionized water and 5 grams of gelatin, raised the temperature to 85°C, reacted for 3 hours, then raised the temperature to 90°C, reacted for 9 hours, and finally The temperature was raised to 100° C., and the reaction was carried out for 10 hours. After the reaction, pour out the upper liquid, wash with 85°C hot water, then wash with cold water, then filter, put in an oven to dry at 80°C, sieve, and collect composite microspheres with a particle size within the range of 0.35 to 0.60 mm b.

[0033] Chloromethylation of composite microspheres: In a 500-ml three-necked flask, add 50 grams of composite microspheres B a...

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Abstract

The invention relates to a macroporous resin catalyst for preparing alkyl carbonate, which mainly solves the problem of the prior art that the activity of the catalyst is low and is quickly reduced. Aiming at well solving the problem, the macroporous resin catalyst adopts the technical scheme that the macroporous resin catalyst is prepared by the following components in percentage by weight: (a) 10% to 20% of metal salts, and (b) 80% to 90% of diphenylphophine substituted composite microspheres. A method for preparing the diphenylphophine substituted composite microspheres comprises the following steps of (1) preparing an additive 1 into a water solution A; (2) preparing a monomer, a comonomer, a nano material, an initiator and an additive 2 into a solution B, wherein at least one of methyl methacrylate, butyl acrylate, styrene, alpha-methylstyrene, 4-butylstyrene or acrylonitrile is adopted as the monomer; (3) mixing the solution B and the solution A to obtain the microspheres; (4) adding a chloromethylation agent or zinc chloride into the microspheres to obtain composite chloride spheres; and (5) adding chlorinated diphenylphosphine and lithium metal into the composite chloride spheres to react, so as to obtain the diphenylphophine substituted composite microspheres. The macroporous resin catalyst can be used for the industrial production of the alkyl carbonate.

Description

technical field [0001] The invention relates to a macroporous 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 syst...

Claims

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Application Information

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