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A kind of supported ionic liquid catalyst and its preparation method and application

An ionic liquid and catalyst technology, which is applied to the supported ionic liquid catalyst and its preparation and application fields, can solve the problems of low mass transfer and low gas metal dispersibility, and achieve the effects of high catalytic activity, high stability and not easy to run off.

Active Publication Date: 2022-04-19
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a supported ionic liquid catalyst and its preparation method and application. The present invention fundamentally solves the shortcomings of low gas metal dispersion and low mass transfer in the supported ionic liquid catalyst system

Method used

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  • A kind of supported ionic liquid catalyst and its preparation method and application
  • A kind of supported ionic liquid catalyst and its preparation method and application
  • A kind of supported ionic liquid catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Catalyst preparation:

[0077] 1) Select 10 g of silicon carbide as the carrier, dissolve it in 40 mL of toluene, stir for 30 min, and then add 0.1 g of dimethyldichlorosilane and 0.1 g of triethylamine. The above mixture was heat-treated under nitrogen at 50° C. for 2 hours. After filtering, the filter cake was washed with toluene and ethanol, dried at 180°C, and the obtained solid sample was used for future use.

[0078] 2) Take 0.05g of 1-propyl-2,3-dimethylimidazole bis-trifluoromethanesulfonimide salt and 0.05g of 1-hexyl-2,3-dimethylimidazole bis-trifluoromethanesulfonimide salt ion The liquid was dissolved in 0.5mL toluene, and after stirring evenly, the solid sample obtained in step 1) was added, soaked for 2 hours, and dried at 180°C for later use. Wherein the mass loading of ionic liquid is 1%.

[0079] 3) Dissolve 0.009g of chloroauric acid in 0.09mL of toluene, stir evenly, add the sample obtained in step 2), dip in an external 0.2kV static electric field...

Embodiment 2

[0084] Catalyst preparation:

[0085] 1) Select 10g of boron carbide as the carrier, dissolve it in 200mL of nitrogen-nitrogen dimethylformamide, stir for 30min, and then add 0.2g of dimethyldichlorosilane and 1g of triethylamine. The above mixture was heat-treated under nitrogen at 60° C. for 2.5 hours. After filtering, the filter cake was washed with toluene and ethanol, dried at 180°C, and the obtained solid sample was used for future use.

[0086] 2) Dissolve 0.4 g of 1-butyl-3-methylimidazolium hexafluorophosphate and 1.6 g of 1-propyl-3-butylimidazolium tetrafluoroborate ionic liquid in 10 mL of nitrogen-nitrogen dimethylformamide , after stirring evenly, add the solid sample obtained in step 1), soak for 3 hours, and dry at 180°C for use. Wherein the mass loading of ionic liquid is 20%.

[0087] 3) Dissolve 0.103g of ruthenium chloride in 0.5mL of nitrogen-nitrogen dimethylformamide, stir evenly, add the sample obtained in step 2), and immerse in an external 4kV stat...

Embodiment 3

[0092] Catalyst preparation:

[0093] 1) Select 10 g of titanium carbide as the carrier, dissolve it in 70 mL of azaalkylpyrrolidone, stir for 30 min, and then add 0.6 g of dimethyldichlorosilane and 0.2 g of triethylamine. The above mixture was heat-treated under nitrogen at 70° C. for 3 hours. After filtering, the filter cake was washed with toluene and ethanol, dried at 180°C, and the obtained solid sample was used for future use.

[0094] 2) Dissolve 0.15g of 1-butyl-3-methylimidazolium hexafluorophosphate and 0.35g of nitrogen-methylpyrrolidone hydrochloride ionic liquid in 50mL of nitrogen-methylpyrrolidone, stir evenly, and add the obtained in step 1) The solid samples were soaked for 4 hours and dried at 180°C for later use. Wherein the mass loading of ionic liquid is 5%.

[0095]3) Dissolve 4.23g of copper chloride in 2.12mL of nitrogen-methylpyrrolidone, stir evenly, add the sample obtained in step 2), dip in an external 3kV static electric field for 3h, and dry a...

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Abstract

The invention provides a supported ionic liquid catalyst and its preparation method and application. The dispersion effect of the metal in the carbide carrier of the catalyst of the present invention is better, the catalytic activity is higher, and the stability is better. The ionic liquid is stabilized by silanol on the The surface of the carrier is not easy to lose from the surface of the carrier. The metal is stabilized on the outer layer of the catalyst by coordinating with the ionic liquid, which reduces the influence of mass transfer and improves the dispersion of the metal. The invention introduces an external static electric field for the first time In the preparation of metal-based catalysts loaded with ionic liquids, the enrichment of metal active centers on the surface of ionic liquids is promoted. Since the metal active centers of the catalyst of the present invention are distributed on the surface of ionic liquids, the influence of substrate diffusion is reduced. In the evaluated Under the reaction conditions, the induction period of the catalyst disappeared.

Description

(1) Technical field [0001] The invention relates to a supported ionic liquid catalyst and its preparation method and application. (2) Background technology [0002] Vinyl chloride is the monomer of polyvinyl chloride (PVC), one of the five largest synthetic resins in the world, and is mainly produced by the calcium carbide acetylene method and the petroleum ethylene method. China's coal-rich, oil-poor, and gas-poor energy reserves determine that the calcium carbide acetylene method will continue to be the main process for the production of vinyl chloride in my country for a long time to come, that is, mercuric chloride catalyzes the reaction of acetylene and hydrogen chloride to produce vinyl chloride. However, the highly toxic mercuric chloride catalyst seriously pollutes the environment and endangers human health. Therefore, the development of non-mercury catalysts is very necessary for the sustainable development of the calcium carbide acetylene synthesis of vinyl chlori...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02B01J31/22B01J31/24C07C17/08C07C21/06B01J37/02B01J37/34
CPCB01J31/0295B01J31/0284B01J31/0279B01J31/0282B01J31/0288B01J31/182B01J31/1815B01J31/1805B01J31/24B01J31/183C07C17/08B01J37/342B01J37/0203B01J37/0207B01J37/0205B01J37/0209B01J2231/32B01J2531/18B01J2531/821B01J2531/16B01J2531/822C07C21/06
Inventor 李小年赵佳王柏林丰枫张群峰岳玉学赖慧霞金春晓陈志
Owner ZHEJIANG UNIV OF TECH
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