Method for preparing ethylene carbonate through continuous heterogeneous catalysis and catalyst

A heterogeneous catalyst, ethylene carbonate technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of high catalyst cost, catalyst deactivation, separation and other problems, to achieve the effect of high catalyst activity, simple operation and simple synthesis process

Active Publication Date: 2012-06-27
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the prior art, the addition reaction of ethylene oxide and carbon dioxide is used to prepare ethylene carbonate, all of which are batch operations and the cost of catalyst consumptio

Method used

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  • Method for preparing ethylene carbonate through continuous heterogeneous catalysis and catalyst
  • Method for preparing ethylene carbonate through continuous heterogeneous catalysis and catalyst
  • Method for preparing ethylene carbonate through continuous heterogeneous catalysis and catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Synthesis of catalyst-imidazolium ionic liquid polymer immobilized on inorganic powder:

[0046] (a) Take a three-necked flask and feed it with N 2 For protection, add 9.41g N-vinylimidazole (0.1mol) and 30g absolute ethanol and heat and stir, then slowly add 12.52g bromoethanol (0.1mol) dropwise, heat and stir at 70°C for 24h, distill under reduced pressure, and dry in vacuo to obtain Vinylimidazolium Ionic Liquid.

[0047] (b) After mixing 10 parts of vinylimidazole ionic liquid, 5 parts of methacrylic acid, 1 part of styrene, 10 parts of hydroxyethyl acrylate and 65 parts of double distilled water, based on the weight of the above mixture, the The imidazolium ionic liquid polymer was prepared by copolymerization under the action of 2% initiator ammonium persulfate, 1% sodium hypophosphite monohydrate, 1‰ tetrabutyl ammonium bromide, and 2‰ sodium dodecyl sulfate for 2 hours.

[0048] Thermogravimetry curve, infrared spectrum and 1 HNMR figure (nuclear magnetic...

Embodiment 2

[0052] (1) Synthesis of catalyst-imidazolium ionic liquid polymer immobilized on inorganic powder:

[0053] (a) Take a three-necked flask and feed it with N 2 For protection, add 9.41g N-vinylimidazole (0.1mol) and 30ml absolute ethanol and heat and stir, then slowly add 12.42g bromoethylamine (0.1mol) dropwise, heat and stir at 70°C for 24h, then distill under reduced pressure, vacuum Dry to obtain vinylimidazolium ionic liquid.

[0054] (b) After mixing 10 parts of vinylimidazole ionic liquid, 5 parts of methacrylic acid, 1 part of styrene, 10 parts of hydroxyethyl acrylate and 65 parts of double distilled water, based on the weight of the above mixture, the The imidazolium ionic liquid polymer was prepared by copolymerization under the action of 2% initiator ammonium persulfate, 1% sodium hypophosphite monohydrate, 1‰ tetrabutyl ammonium bromide, and 2‰ sodium dodecyl sulfate for 2 hours.

[0055] (c) The prepared imidazolium ionic liquid polymer was coated on 4A molecula...

Embodiment 3

[0058] (1) Catalyst - synthesis of imidazolium ionic liquid polymer immobilized on inorganic powder:

[0059] (a) Take a three-necked flask and feed it with N 2 For protection, add 9.41g N-vinylimidazole (0.1mol) and 30 parts of absolute ethanol and heat and stir, then slowly add 12.42g bromoethane (0.1mol) dropwise, heat and stir at 70°C for 24h, then distill under reduced pressure, vacuum Dry to obtain vinylimidazolium ionic liquid.

[0060] (b) After mixing 10 parts of vinylimidazole ionic liquid, 5 parts of methacrylic acid, 1 part of styrene, 10 parts of hydroxyethyl acrylate and 65 parts of double distilled water, based on the weight of the above mixture, the The imidazolium ionic liquid polymer was prepared by copolymerization under the action of 2% initiator ammonium persulfate, 1% sodium hypophosphite monohydrate, 1‰ tetrabutyl ammonium bromide, and 2‰ sodium dodecyl sulfate for 2 hours.

[0061] (c) The prepared imidazolium ionic liquid polymer is coated on 4A mole...

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Abstract

The invention relates to a continuous heterogeneous catalyst and a process for synthesizing ethylene carbonate through continuous heterogeneous catalysis. The ethylene carbonate is prepared through carrying out a catalytic addition reaction on a packed bed reactor device by taking ethylene oxide and carbon dioxide as raw materials and taking a novel functional ionic liquid polymer adsorbed on an inorganic particle as a solid catalyst. The catalyst is prepared by stirring and coating a functional imidazolium ionic liquid polymer on an inorganic carrier. The ethylene carbonate is prepared by mixing ethylene oxide and the carbon dioxide by using nitrogen gas as carrier gas in the packed bed reactor device and carrying out a cyclic addition reaction under the action of the catalyst, wherein the reaction pressure is 1.0-6.0MPa, the reaction temperature is 80-150 DEG C, and the reaction time is 1-6h. The continuous heterogeneous catalyst and the process for synthesizing ethylene carbonate through continuous heterogeneous catalysis have the advantages that the method with a continuous process is simple in operation, low in cost, free of separation and distillation and suitable for large-scale industrial production; and the catalyst has high activity, low loss, high ethylene oxide conversion ratio up to 97% and high electivity up to 98%.

Description

technical field [0001] The invention relates to a method for preparing ethylene carbonate by continuous heterogeneous catalysis, especially after mixing ethylene oxide and carbon dioxide gas as raw materials, passing through a fixed-bed micro-reaction device coated with functional imidazole ionic liquid polymer Inorganic particle catalyst for continuous production of ethylene carbonate products. Background technique [0002] Ethylene carbonate (EC) is an organic solvent and surfactant raw material with wide application and excellent performance. It can be used as an intermediate in organic synthesis, and can also be used as a raw material for the synthesis of furazolidone, water glass-based slurry, fiber finishing agent and High-performance lithium battery electrolyte, etc. (Zhang Yubao, Lin Qingsong Properties and applications of ethylene carbonate [J]. Chemical World, 1998, (1): 10-12; World Fine Chemicals Handbook of Science and Technology Information Research Institute o...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J31/06C07D317/38
Inventor 任天瑞吴青海张博汪小芬
Owner SHANGHAI NORMAL UNIVERSITY
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