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Catalyst for preparing vinyl acetate by acetylene method

A vinyl acetate and catalyst technology, which is applied in the direction of physical/chemical process catalyst, carboxylate preparation, organic compound/hydride/coordination complex catalyst, etc., can solve the problem of low catalyst activity and achieve improved activity and stability , the effect of increasing the yield

Active Publication Date: 2019-04-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is the low activity of the acetylene method vinyl acetate catalyst in the prior art, and a new catalyst for the preparation of vinyl acetate by the acetylene method is provided, which has the characteristics of high activity

Method used

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  • Catalyst for preparing vinyl acetate by acetylene method
  • Catalyst for preparing vinyl acetate by acetylene method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation of catalyst: will contain 98g zinc acetate (Zn(OAc) 2 ), containing 6.30g potassium acetate (KOAc) and palladium acetate (Pd(OAc) containing 3.20gPd 2 ) is fully mixed and dissolved in an aqueous solution of acetic acid with a concentration of 60wt%, to obtain 350ml of impregnation solution, and 1L of 3mm in diameter, 2cm in length, and 0.80cm in pore volume 3 / g, the specific surface area is 1200m 2 / g of coal-based cylindrical activated carbon carrier was impregnated in the above impregnating solution, and dried at 100°C for 3 hours to obtain the catalyst. The Zn content of the catalyst was determined by ICP to be 98g / L, the K content was 6.30g / L, and the Pd content was 3.20g / L.

[0026] The synthesis of vinyl acetate: 30ml catalyst is packed in the miniature fixed-bed reactor, with N 2 After leak test, use N 2 Fully purge the system, after the system heats up, turn off the N 2 , cut into acetylene in turn, turn on the acetic acid pump, control th...

Embodiment 2

[0030] The preparation of catalyst: will contain 98g zinc acetate (Zn(OAc) 2 ), containing 6.30g potassium acetate (KOAc) and beryllium acetate (Be(OAc) containing 3.20g Be 2 ) is fully mixed and dissolved in an aqueous solution of acetic acid with a concentration of 60wt%, to obtain 350ml of impregnation solution, and 1L of 3mm in diameter, 2cm in length, and 0.80cm in pore volume 3 / g, the specific surface area is 1200m 2 / g of coal-based cylindrical activated carbon carrier was impregnated in the above impregnating solution, and dried at 100°C for 3 hours to obtain the catalyst. The Zn content of the catalyst was determined by ICP to be 98g / L, the K content was 6.30g / L, and the Be content was 3.20g / L.

[0031] The synthesis of vinyl acetate: 30ml catalyst is packed in the miniature fixed-bed reactor, with N 2 After leak test, use N 2 Fully purge the system, after the system heats up, turn off the N 2 , cut into acetylene in turn, turn on the acetic acid pump, control t...

Embodiment 3

[0042] The preparation of catalyst: will contain 80g zinc acetate (Zn(OAc) 2 ), containing 3.00g potassium acetate (KOAc) and containing 1.00gRh rhodium acetate (Rh 2 (OAc) 4 ) is fully mixed and dissolved in an aqueous solution of acetic acid with a concentration of 60wt%, to obtain 350ml of impregnating solution, and 1L of 3mm in diameter, 2cm in length, and 0.60cm in pore volume 3 / g, the specific surface area is 1000m 2 / g cylindrical coconut shell activated carbon carrier was immersed in the above impregnating solution, and dried at 80° C. for 3 hours to obtain the catalyst. The Zn content of the catalyst was measured by ICP as 80g / L, the K content was 3.00g / L, and the Rh content was 1.00g / L.

[0043] The synthesis of vinyl acetate: 30ml catalyst is packed in the miniature fixed-bed reactor, with N 2 After leak test, use N 2 Fully purge the system, after the system heats up, turn off the N 2 , cut into acetylene in turn, turn on the acetic acid pump, control the rea...

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Abstract

The invention relates to a catalyst for acetylene method preparation of vinyl acetate to mainly solve the problem of low activity of acetylene vapor phase method catalysts in the prior art. The catalyst used for acetylene method production of vinyl acetate comprises adopts active carbon as a carrier, and active components comprise zinc acetate, potassium acetate and a compound of at least one metal element selected from platinum cluster metals and alkali earth metals. The catalyst provided by the invention well solves the problem and can be used in the industrial production of acetylene vapor phase method production of vinyl acetate.

Description

technical field [0001] The invention relates to a catalyst for preparing vinyl acetate by acetylene method, a preparation method of the vinyl acetate catalyst by acetylene gas phase method and a synthesis method of vinyl acetate by acetylene gas phase method. Background technique [0002] Vinyl acetate (VA for short) C ) is an important organic chemical raw material, which 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. At present, the industrial production methods of vinyl acetate include acetylene gas phase method and ethylene gas phase method. [0003] The production of vinyl acetate by acetylene process has gone through two stages of development: liquid phase and gas phase process. Before 1940, the liquid-phase process was mainly used, and the reaction was carried out at 30-70 °C under normal pressure, and the catalyst was mercury ...

Claims

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Application Information

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