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Catalyst for synthesizing vinyl acetate with acetylene process, preparation method and vinyl acetate synthesizing method

A vinyl acetate and catalyst technology, applied in the field of vinyl acetate synthesis, acetylene process vinyl acetate catalyst, and preparation, can solve the problems of low production capacity, rapid activity decline, short service life, etc., and achieve the effect of improving catalytic activity and stability

Inactive Publication Date: 2016-09-21
SHIHEZI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalyst still has the disadvantages of rapid decline in activity, low production capacity and short service life.

Method used

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  • Catalyst for synthesizing vinyl acetate with acetylene process, preparation method and vinyl acetate synthesizing method
  • Catalyst for synthesizing vinyl acetate with acetylene process, preparation method and vinyl acetate synthesizing method

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preparation example Construction

[0020] The present invention proposes a kind of preparation method of acetylene method vinyl acetate catalyst, introduces at least one V group non-metallic element on activated carbon carrier; It comprises the following steps:

[0021] 1) Stirring and mixing with activated carbon in an aqueous solution, the aqueous solution containing at least one compound of Group V non-metallic elements;

[0022] 2) Suction filtering, drying and calcining the activated carbon to obtain a doped activated carbon carrier;

[0023] 3) loading acetate by equal volume impregnation method to obtain acetylene method vinyl acetate catalyst;

[0024] Wherein, the mass ratio of the compound of the group V non-metal element, activated carbon, and acetate is 0.1-0.4:1:0.1-0.3.

[0025] A kind of vinyl acetate synthesis method that the present invention proposes, in the presence of above-mentioned acetylene method vinyl acetate catalyst, raw material gas composition is acetylene in molar ratio: acetic ac...

Embodiment 1

[0027] Catalyst preparation method:

[0028] 1) Add 0.2 g of cyanamide solution with a mass fraction of 50% to 5 g of distilled water for dilution, add 1 g of coconut shell activated carbon, and fully mix and stir at room temperature for 24 hours;

[0029] 2) Suction-filtering the activated carbon, drying at 50°C for 12 hours, and fully calcining at 400°C for 1 hour to obtain a nitrogen-doped activated carbon carrier;

[0030] 3) Loading 0.1 g of zinc acetate by an equal-volume impregnation method to obtain an acetylene-method vinyl acetate catalyst.

[0031] The comparative example is a zinc acetate / activated carbon catalyst, the carrier is not doped with nitrogen, and other reaction conditions are the same.

[0032] Catalyst evaluation:

[0033] Catalysts synthesized by the above method were evaluated using a gas-solid phase catalytic reaction device. The evaluation conditions are: catalyst loading: 5ml catalyst; reaction temperature: 180°C; raw material volume space velo...

Embodiment 2

[0036] Catalyst preparation method:

[0037] 1) Add 0.8 g of melamine solution with a mass fraction of 50% to 5 g of distilled water for dilution, add 1 g of coal-based activated carbon, and fully mix and stir at room temperature for 12 hours;

[0038] 2) Suction-filtering the activated carbon, drying at 100°C for 6h, and fully calcining at 900°C for 0.5h to obtain a nitrogen-doped activated carbon carrier;

[0039] 3) Loading 0.3 g of potassium acetate by an equal-volume impregnation method to obtain an acetylene-method vinyl acetate catalyst.

[0040] The comparison example is potassium acetate / activated carbon catalyst, the carrier is not doped with nitrogen, and other reaction conditions are the same.

[0041] Catalyst evaluation:

[0042] Catalysts synthesized by the above method were evaluated using a gas-solid phase catalytic reaction device. The evaluation conditions are: catalyst loading: 5ml catalyst; reaction temperature: 150°C; raw material volume space velocity...

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Abstract

The invention relates to a catalyst for synthesizing vinyl acetate with an acetylene process, a preparation method and a vinyl acetate synthesizing method. The preparation method of the catalyst for synthesizing vinyl acetate with the acetylene process comprises the following steps: 1) an aqueous solution is stirred and mixed with activated carbon, and the aqueous solution contains at least one compound of a group-V non-metallic element; 2) activated carbon is subjected to suction filtration, drying and calcination, and a doped activated carbon carrier is obtained; 3) acetate is loaded with an equivalent-volume impregnation method, and the catalyst for synthesizing vinyl acetate with the acetylene process is obtained, wherein the mass ratio of the compound of the group-V non-metallic element to the activated carbon to acetate is (0.1-0.4):1:(0.1-0.3). The catalyst for synthesizing vinyl acetate with the acetylene process has good catalytic activity and stability in synthesis of vinyl acetate.

Description

technical field [0001] The invention relates to a catalyst and a preparation method, in particular to an acetylene method vinyl acetate catalyst, a preparation method and a vinyl acetate synthesis method. Background technique [0002] Vinyl acetate (VAc for short) is one of the 50 kinds of organic chemical raw materials with the largest output in the world. It is widely used in the manufacture of polyvinyl acetate and polyvinyl alcohol and further processed for adhesives, coatings, vinylon fibers, fabric processing, emulsions, Resins and films etc. [0003] At present, the processes used in the production of vinyl acetate mainly include petroleum ethylene method and calcium carbide acetylene method. However, the resource characteristics of my country's "poor oil, less gas, and rich coal" determine the technical advantages of the calcium carbide acetylene method for the synthesis of vinyl acetate. widely used. The synthesis of vinyl acetate by calcium carbide acetylene has t...

Claims

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Application Information

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IPC IPC(8): B01J31/04B01J27/24B01J27/14C07C67/04C07C69/15
CPCB01J27/14B01J27/24B01J31/04B01J2231/49C07C67/04C07C69/15
Inventor 代斌吴学咿王绪根何佩杰
Owner SHIHEZI UNIVERSITY
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