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Catalyst for synthesizing vinyl acetate by acetylene process

A vinyl acetate and catalyst technology, which is applied in the field of synthesis of vinyl acetate by acetylene vapor phase method, can solve the problems of poor catalyst stability, low catalyst activity reduction rate, and large catalyst activity reduction rate, so as to improve catalyst life, reduce degradation rate, and increase The effect of stability

Active Publication Date: 2019-12-10
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 problem of poor stability of acetylene-method vinyl acetate catalyst and too large reduction rate of catalyst activity in the prior art, and a new catalyst for the synthesis of acetylene-method vinyl acetate is provided, which is stable Good performance, and has the characteristics of low catalyst activity reduction rate and long life

Method used

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  • Catalyst for synthesizing vinyl acetate by acetylene process
  • Catalyst for synthesizing vinyl acetate by acetylene process
  • Catalyst for synthesizing vinyl acetate by acetylene process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation of catalyst: will contain 105g zinc acetate (Zn(OAc) 2 ), ammonium tellurate containing 3.38g Te ((NH 4 ) 2 TeO 4 ) fully mixed and dissolved in an aqueous acetic acid solution with a concentration of 10wt%, 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 1200cm 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 zinc acetate content of the catalyst measured or converted by ICP is 105g / L, and the Te content is 3.38g / L.

[0036] The synthesis of vinyl acetate: 30ml catalyst is packed in the miniature fixed-bed reactor, 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 reaction temperature to 175°C, and the reaction pressure...

Embodiment 2

[0040] The preparation of catalyst: will contain 105g zinc acetate (Zn(OAc) 2), ammonium chloroplatinite containing 3.38g Pt ((NH 4 ) 2 PtCl 4 ) fully mixed and dissolved in an aqueous acetic acid solution with a concentration of 10wt%, 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 1200cm 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 zinc acetate content of the catalyst measured or converted by ICP is 105g / L, and the Pt content is 3.38g / L.

[0041] The synthesis of vinyl acetate: 30ml catalyst is packed in the miniature fixed-bed reactor, 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 reaction temperature to 175°C, and the reaction pr...

Embodiment 3

[0052] The preparation of catalyst: will contain 80g zinc acetate (Zn(OAc) 2 ), rhodium acetate containing 1.00g Rh (Rh 2 (OAc) 4 ) fully mixed and dissolved in an aqueous acetic acid solution with a concentration of 10wt%, to obtain 350ml of impregnation solution, and 1L of 3mm in diameter, 2cm in length, and 0.60cm in pore volume 3 / g, the specific surface area is 1000cm 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 zinc acetate content of the catalyst measured or converted by ICP is 80g / L, and the Rh content is 1.00g / L.

[0053] The synthesis of vinyl acetate: 30ml catalyst is packed in the miniature fixed-bed reactor, 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 reaction temperature to 175°C, and the reaction pressure to 0.25MPa...

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Abstract

The invention relates to a catalyst for synthesis of vinyl acetate by an acetylene method. The problem that the acetylene gas phase method catalyst has low stability in the prior art is mainly solved.By adoption of the technical scheme, the catalyst for synthesis of vinyl acetate by the acetylene method takes activated carbon as a carrier, active components comprise zinc acetate and a cocatalyst,and the cocatalyst comprises at least one metal element selected from metalloid and at least one metal element selected from platinum group metal, so that the problem is solved well and the catalystcan be applied to industrial production of synthesizing vinyl acetate by the acetylene gas phase method.

Description

technical field [0001] The invention relates to a catalyst used for synthesizing acetylene method vinyl acetate, a preparation method of the acetylene gas phase method vinyl acetate catalyst and a synthesis method of acetylene gas phase method vinyl acetate. 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 o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/04B01J31/28C07C67/04C07C69/15
CPCB01J31/04B01J31/28C07C67/04C07C69/15
Inventor 查晓钟杨运信
Owner CHINA PETROLEUM & CHEM CORP
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