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Preparation method of acetylene method vinyl acetate catalyst

A technology of vinyl acetate and catalyst, which is applied in the field of preparation of vinyl acetate catalyst by acetylene method, can solve the problems of poor catalyst stability and short service life, and achieve the effect of improving stability and service life and good technical effect

Pending Publication Date: 2021-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is that the catalyst stability existing in the prior art is relatively poor, and the service life is shorter problem, a kind of preparation method of new acetylene method vinyl acetate catalyst is provided, the catalyst that this method makes has The catalyst has the characteristics of good stability and long service life

Method used

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  • Preparation method of acetylene method vinyl acetate catalyst
  • Preparation method of acetylene method vinyl acetate catalyst
  • Preparation method of acetylene method vinyl acetate catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Activated carbon heat treatment: 300ml coconut shell activated carbon AC is placed in a tubular atmosphere furnace, 2 and N 2 Mixed atmosphere (O in the mixed atmosphere 2 The volume is 5%), the temperature is programmed to 400°C (the heating rate is 10°C / min, the mixed gas flow rate is 30ml / min), after constant temperature for 3h, it is naturally cooled to room temperature, and the modified carbon AC1 is obtained;

[0054] (2) Ionic liquid treatment: Take 100ml of 5.0g / L ethanol solution of N-ethyl acetate pyridinium acetate ionic liquid ([EtaPy]Ac), mix with 100ml of modified carbon AC1, soak at 25°C for 6h, After filtration, dry in vacuum (vacuum pressure: 100Pa) at 40°C for 24 hours to obtain the finished modified carbon product AC2;

[0055] (3) Catalyst preparation

[0056] Preparation of dipping solution: weigh 20.0g of zinc acetate (molecular formula: Zn(CH 3 COO) 2 ) was dissolved in deionized water, and acetic acid was used to adjust its pH value to 4...

Embodiment 2

[0071] (1) Activated carbon heat treatment: 300ml coconut shell activated carbon AC is placed in a tubular atmosphere furnace, 2 and N 2 Mixed atmosphere (O in the mixed atmosphere 2 The volume is 5%), the temperature is programmed to 400°C (the heating rate is 10°C / min, the mixed gas flow rate is 30ml / min), after constant temperature for 3h, it is naturally cooled to room temperature, and the modified carbon AC1 is obtained;

[0072] (2) Ionic liquid treatment: take 100ml of 5.0g / L ethanol solution of N-acetoxypyridinium acetate ionic liquid ([EtPy]Ac), mix with 100ml of modified carbon AC1, soak at 25°C for 6h, and filter Dry in vacuum (vacuum pressure: 100Pa) at 40°C for 24 hours to obtain the finished modified carbon product AC2;

[0073] (3) Catalyst preparation

[0074] Preparation of dipping solution: weigh 20.0g of zinc acetate (molecular formula: Zn(CH 3 COO) 2 ) was dissolved in deionized water, and acetic acid was used to adjust its pH value to 4.70 to obtain 2...

Embodiment 3

[0089] (1) Activated carbon heat treatment: 300ml coconut shell activated carbon AC is placed in a tubular atmosphere furnace, 3 and N 2 Mixed atmosphere (O in the mixed atmosphere 3 Under the condition of 5% volume), the temperature was programmed to 400°C (the heating rate was 10°C / min, the flow rate of the mixed gas was 30ml / min), and after constant temperature for 3 hours, it was naturally cooled to room temperature to obtain modified carbon AC1;

[0090] (2) Ionic liquid treatment: Take 100ml of 5.0g / L ethanol solution of N-(2-hydroxy-3-chloropropyl)pyridine acetate ionic liquid ([HPy]Ac) and mix it with 100ml modified carbon AC1 , impregnated at 25°C for 6h, filtered and dried at 40°C in vacuum (vacuum pressure: 100Pa) for 24h to obtain the finished modified carbon product AC2;

[0091] (3) Catalyst preparation

[0092] Preparation of dipping solution: weigh 20.0g of zinc acetate (molecular formula: Zn(CH 3 COO) 2 ) was dissolved in deionized water, and acetic acid ...

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Abstract

The invention relates to a preparation method of an acetylene method vinyl acetate catalyst and mainly solves the problems of poor stability and short service life of a catalyst in the prior art. Thepreparation method of the acetylene method vinyl acetate catalyst comprises the following steps of: (1) carrying out heat treatment on activated carbon AC in an oxygen-containing substance atmosphereto obtain AC1; (2) treating the AC1 with an ionic liquid to obtain AC2; and (3) loading a catalyst active component by an impregnation method, the active component comprising zinc acetate. With the method provided by the technical schemes of the invention adopted, the problem is better solved; and the method can be used for industrial production of acetylene method vinyl acetate.

Description

technical field [0001] The invention relates to a preparation method of an acetylene method vinyl acetate catalyst. Background technique [0002] Vinyl acetate, referred to as vinyl acetate (VAM), is an important organic chemical raw material, mainly used in the production of polyvinyl alcohol (PVOH), polyvinyl acetate (PVAc), vinyl acetate-ethylene copolymer emulsion (VAE) or copolymer resin (EVA) and other derivatives have a wide range of applications. [0003] At present, the world's vinyl acetate production capacity is about 9 million tons per year, and its main production process routes include ethylene method and acetylene method. Among them, my country's vinyl acetate production capacity has reached 3.4 million tons per year, mainly based on the acetylene production process. The acetylene process is further divided into the natural gas acetylene process and the calcium carbide acetylene process. In China, only Sinopec Chongqing Chuanwei Chemical Co., Ltd. adopts the...

Claims

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Application Information

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IPC IPC(8): B01J31/02C07C69/15C07C67/04
CPCB01J31/0284C07C67/04B01J2231/32C07C69/15Y02P20/584
Inventor 邱鹏远杨运信张丽斌
Owner CHINA PETROLEUM & CHEM CORP
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