Supported ruthenium-pyrrolidine ionic liquid catalyst as well as preparation method and application thereof

A technology of ionic liquid and pyrrolidine, which is applied in the field of catalysts for the addition reaction of acetylene and hydrogen chloride, can solve the problems of catalyst deactivation and carbon deposition

Pending Publication Date: 2022-04-12
贵州重力科技环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The applicant has applied for a patent with the patent number CN201710758445.X, which contains RuCl 3 0.2-1 part, CoCl 2 0.48-2.4 parts, InCl 3 0.2-1.1 parts, CuCl 2 0.25-1.3 parts, and the balance is nitrogen-doped activated carbon. Although the catalyst has the advantages of small active component particle size, large specific surface area, high dispersion, high catalytic conversion rate and long service life, the inventor found that During the use of the catalyst, the phenomenon of carbon deposition is relatively serious, and the carbon deposition will cover the active sites of the catalyst and lead to catalyst deactivation

Method used

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  • Supported ruthenium-pyrrolidine ionic liquid catalyst as well as preparation method and application thereof
  • Supported ruthenium-pyrrolidine ionic liquid catalyst as well as preparation method and application thereof
  • Supported ruthenium-pyrrolidine ionic liquid catalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0025] Example 1. A supported ruthenium-pyrrolidine ionic liquid catalyst, the catalyst is composed of RuCl3, pyrrolidine ionic liquid and carrier activated carbon.

[0026] Described catalyst, by weight, contains RuCl in every one hundred parts 3 0.001-1 part, the content of pyrrolidine ionic liquid is 1-20 parts per hundred parts, and the balance is carrier activated carbon.

[0027] The pyrrolidine ionic liquid is N-butyl-N-methylpyrrolidine bromide.

[0028] Better yet, the catalyst, in parts by weight, contains RuCl in every hundred parts 3 0.01-0.5 parts, the content of pyrrolidine ionic liquid is 5-15 parts per hundred parts, and the balance is carrier activated carbon.

[0029] A kind of preparation method of supported ruthenium-pyrrolidine ionic liquid catalyst, is prepared by impregnating-drying method, RuCl 3 and pyrrolidine ionic liquids are uniformly mixed to obtain a solution, then activated carbon is added into the solution, the impregnation temperature is 5...

Embodiment 2

[0033] Example 2. A kind of supported ruthenium-pyrrolidine ionic liquid catalyst, described catalyst, by weight, contains RuCl in every hundred parts 3 0.3 parts, the content of pyrrolidine ionic liquid N-butyl-N-methylpyrrolidinium bromide is 18 parts in every hundred parts, the balance is carrier activated carbon, and the catalyst is prepared by impregnation-drying method, and RuCl 3 and pyrrolidine ionic liquids are uniformly mixed to obtain a solution, then activated carbon is added into the solution, the impregnating temperature is 70° C., and dried after impregnating. The obtained catalyst is used for the addition reaction of acetylene and hydrogen chloride. The conditions for the addition reaction of acetylene and hydrogen chloride are: temperature 90-200°C, molar ratio of acetylene to hydrogen chloride is 1:1.05, and the space velocity of acetylene is 25h -1, the conversion rate of acetylene is 99.7%, and the selectivity of vinyl chloride is 99.8%.

Embodiment 3

[0034] Example 3. A kind of supported ruthenium-pyrrolidine ionic liquid catalyst, described catalyst, by weight, contains RuCl in every hundred parts 3 0.25 parts, the content of pyrrolidine ionic liquid N-butyl-N-methylpyrrolidinium bromide is 16.5 parts per hundred parts, and the balance is carrier activated carbon. The catalyst is prepared by impregnation-drying method, and RuCl 3 and pyrrolidine ionic liquids are uniformly mixed to obtain a solution, then activated carbon is added into the solution, the impregnation temperature is 60°C, and the impregnation is dried. The obtained catalyst is used for the addition reaction of acetylene and hydrogen chloride. The conditions for the addition reaction of acetylene and hydrogen chloride are: temperature 90-200°C, molar ratio of acetylene to hydrogen chloride is 1:1.05, and the space velocity of acetylene is 23h -1 , the conversion rate of acetylene is 99.8%, and the selectivity of vinyl chloride is 99.8%.

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Abstract

The invention discloses a supported ruthenium-pyrrolidine ionic liquid catalyst, the catalyst is composed of RuCl3 and pyrrolidine ionic liquid, the catalyst is prepared by adopting a dipping-drying mode, and the catalyst has the advantages of multiple active sites, high dispersity, high catalytic conversion rate, high selectivity and good anti-carbon deposition effect.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to a catalyst for the addition reaction of acetylene and hydrogen chloride. Background technique [0002] In recent years, the mercury-free catalysts for acetylene hydrochlorination are mainly chloride salts of Au, Ru, and Cu. The industrial application cost of Au-based catalysts is too high, and the selectivity of Cu-based catalysts needs to be further improved, resulting in (VCM) has too many by-products in the production process to be industrially applied. Ionic liquids have special properties such as dipole interaction and polarizability, have the ability to activate hydrogen chloride, and have good industrial application prospects in acetylene hydrochlorination. Therefore, the design concept based on ruthenium chloride-ionic liquid type supported catalyst has received extensive attention, and the present invention uses ruthenium chloride and pyrrolidine ionic liquid as catalytically a...

Claims

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Application Information

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IPC IPC(8): B01J31/02B01J31/30C07C17/08C07C21/06
Inventor 张彬李武斌李安静何家明赵应黔易南冯琴
Owner 贵州重力科技环保股份有限公司
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