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Vinyl acetate catalyst, preparation method and vinyl acetate synthesis method

A technology of vinyl acetate and synthesis method, applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., can solve problems such as low catalyst activity

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the technical problems to be solved by the present invention is the problem of low catalyst activity in the prior art, and a new vinyl acetate catalyst is provided, which has the characteristics of high activity

Method used

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  • Vinyl acetate catalyst, preparation method and vinyl acetate synthesis method
  • Vinyl acetate catalyst, preparation method and vinyl acetate synthesis method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. Catalyst preparation

[0017] (1) Impregnation: impregnate 1L activated carbon carrier with 580ml impregnation solution. Zn(OAc) in the immersion solution 2 The content is 120 g, the content of 24-crown-8 is 6.0 g, and the solvent in the impregnation solution is a mixed solvent of acetic acid and water (70 wt% acetic acid and 30 wt% water). The carrier is 3 mm in diameter, 2 cm long, and has a pore volume of 0.8 cm 3 / g, the specific surface area is 1200 cm 2 / g of coal-based cylindrical activated carbon.

[0018] (2) Drying: drying at 100°C to obtain the finished catalyst.

[0019] 2. Catalyst evaluation

[0020] The catalysts synthesized by the above method were evaluated in a laboratory microreactor. The evaluation conditions are: catalyst loading: 30ml catalyst; reaction temperature: 180°C; reaction pressure: 0.25MPa; raw material volume space velocity: 300 h -1 ; Raw material composition: acetylene / acetic acid molar ratio=6:1.

[0021] After the catalyst...

Embodiment 2

[0055] 1. Catalyst preparation

[0056] (1) Impregnation: impregnate 1L activated carbon carrier with 580ml impregnation solution. Zn(OAc) in the immersion solution 2 The content is 120 g, the content of 18-crown ether-6 is 6.0 g, and the solvent in the impregnation solution is a mixed solvent of acetic acid and water (70 wt% acetic acid and 30 wt% water). The carrier is 3 mm in diameter, 2 cm long, and has a pore volume of 0.8 cm 3 / g, the specific surface area is 1200 cm 2 / g of coal-based cylindrical activated carbon.

[0057] (2) Drying: drying at 100°C to obtain the finished catalyst.

[0058] 2. Catalyst evaluation

[0059] The catalysts synthesized by the above method were evaluated in a laboratory microreactor. The evaluation conditions are: catalyst loading: 30ml catalyst; reaction temperature: 180°C; reaction pressure: 0.25MPa; raw material volume space velocity: 300 h -1 ; Raw material composition: acetylene / acetic acid molar ratio=6:1.

[0060] After the ca...

Embodiment 3

[0062] 1. Catalyst preparation

[0063] (1) Impregnation: impregnate 1L activated carbon carrier with 580ml impregnation solution. Zn(OAc) in the immersion solution 2 The content is 120 g, the content of 15-crown ether-5 is 6.0 g, and the solvent in the impregnation solution is a mixed solvent of acetic acid and water (70 wt% acetic acid and 30 wt% water). The carrier is 3 mm in diameter, 2 cm long, and has a pore volume of 0.8 cm 3 / g, the specific surface area is 1200 cm 2 / g of coal-based cylindrical activated carbon.

[0064] (2) Drying: drying at 100°C to obtain the finished catalyst.

[0065] 2. Catalyst evaluation

[0066] The catalysts synthesized by the above method were evaluated in a laboratory microreactor. The evaluation conditions are: catalyst loading: 30ml catalyst; reaction temperature: 180°C; reaction pressure: 0.25MPa; raw material volume space velocity: 300 h -1 ; Raw material composition: acetylene / acetic acid molar ratio=6:1.

[0067] After the ca...

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Abstract

The invention relates to a vinyl acetate catalyst, a preparation method and a vinyl acetate synthesis method, mainly used for solving the problem in the prior art that the activity of the catalyst is not high. The vinyl acetate catalyst is prepared by adopting an acetylene method and adopting active carbon as a carrier body. The catalyst comprises the following active components: 50g / L to 200g / L of zinc acetate and 1.0g / L to 10g / L of a co-catalyst. By adopting the technical scheme that the co-catalyst is selected from at least one of 18-crown ether-6, 15-crown ether-5, 24-crown ether-8, 30-crown ether-10, dibenzo-30-crown ether-10 or other derivatives adopting the 18-crown ether-6, 15-crown ether-5, 24-crown ether-8, 30-crown ether-10 and dibenzo-30-crown ether-10 as a nuclear parent, the problem can be well solved. The vinyl acetate catalyst can be used for the industrial production of the vinyl acetate synthesis in the acetylene method.

Description

technical field [0001] The invention relates to a preparation method of a vinyl acetate catalyst in an acetylene gas phase method and a synthesis method of vinyl acetate. Background technique [0002] At present, the industrial production methods of vinyl acetate include acetylene gas phase method and ethylene gas phase method. The synthesis of vinyl acetate by the acetylene method refers to the reaction of acetylene and acetic acid as raw materials under the action of zinc acetate catalyst to produce vinyl acetate. US Patent (US166482, Production of vinylacetate) reported the use of catalyst Zn(OAc) 2 / C, synthesized vinyl acetate. Many scholars at home and abroad are trying to improve the activity of zinc acetate by modifying activated carbon. The Chinese patent (CN 102029193A, an activated carbon used as a catalyst carrier and its treatment method and application) uses hydrogen peroxide to pretreat the activated carbon carrier. The results show that the catalytic activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/04C07C67/04C07C69/15
Inventor 查晓钟杨运信张丽斌
Owner CHINA PETROLEUM & CHEM CORP
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