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Catalyst for acetylene method vinyl acetate synthesis

A technology of vinyl acetate and catalyst, which is applied in the field of acetylene gas-phase vinyl acetate catalyst, can solve the problems of low acetylene single-pass conversion rate and low catalyst activity, and achieve the effects of improving acetylene single-pass conversion rate, catalyst activity and activity

Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] One of the technical problems to be solved by the present invention is the problem of low catalyst activity and low single-pass conversion rate of acetylene in the vinyl acetate product existing in the prior art, and a new vinyl acetate catalyst is provided, which has high catalytic activity and single-pass conversion of acetylene Features of high conversion rate

Method used

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  • Catalyst for acetylene method vinyl acetate synthesis
  • Catalyst for acetylene method vinyl acetate synthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) carrier preparation

[0041] a) Impregnation: at normal temperature, 100ml of activated carbon A is placed in 120ml of ZnCl with a mass concentration of 10.0wt%. 2 In aqueous solution, after 24h, wash repeatedly with deionized water until the filtrate is neutral;

[0042] b) Drying: Drying at 60°C for 24 hours to obtain modified carbon B;

[0043] c) Activation: the modified carbon B is placed in the atmosphere furnace, under N 2 Under atmospheric conditions, program the temperature to 500°C, keep the temperature for 3 hours, and then cool to room temperature for later use; the programmed temperature rise rate is 10°C / min, N 2 The flow rate was 20 ml / min to obtain the carrier.

[0044] (2) Catalyst preparation

[0045] a) Preparation of impregnation 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 4.85 to obtain 200ml impregnation solution C, wherein ...

Embodiment 2

[0059] (1) carrier preparation

[0060] a) Impregnation: under normal temperature conditions, place 100ml of activated carbon A in 120ml of NaOH aqueous solution with a mass concentration of 10.0wt%, and after 24h, wash repeatedly with deionized water until the filtrate is neutral;

[0061] b) Drying: Drying at 60°C for 24 hours to obtain modified carbon B;

[0062] c) Activation: the modified carbon B is placed in the atmosphere furnace, under N 2 Under atmospheric conditions, program the temperature to 500°C, keep the temperature for 3 hours, and then cool to room temperature for later use; the programmed temperature rise rate is 10°C / min, N 2 The flow rate was 20 ml / min to obtain the carrier.

[0063] (2) Catalyst preparation

[0064] a) Preparation of impregnation 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 4.85 to obtain 200ml impregnation solution C, w...

Embodiment 3

[0078] (1) carrier preparation

[0079] a) Impregnation: under normal temperature conditions, place 100ml of activated carbon A in 120ml of KOH aqueous solution with a mass concentration of 10.0wt%, after 24h, wash repeatedly with deionized water until the filtrate is neutral;

[0080] b) Drying: Drying at 60°C for 24 hours to obtain modified carbon B;

[0081] c) Activation: the modified carbon B is placed in the atmosphere furnace, under N 2 Under atmospheric conditions, program the temperature to 500°C, keep the temperature for 3 hours, and then cool to room temperature for later use; the programmed temperature rise rate is 10°C / min, N 2 The flow rate was 20 ml / min to obtain the carrier.

[0082] (2) Catalyst preparation

[0083] a) Preparation of impregnation 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 4.85 to obtain 200ml impregnation solution C, wherei...

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Abstract

The present invention relates to a catalyst for acetylene method vinyl acetate synthesis, and a preparation method thereof. A purpose of the present invention is mainly to solve the problems of low catalyst activity and low acetylene single-process conversion rate in the prior art. The technical scheme of the present invention comprises that the catalyst comprises an active component and a carrier, the active component is zinc acetate, the carrier is modified active carbon modified by a modifier, and the modifier is at least one selected from ZnCl2, KOH, NaOH, and H3PO4. With the technical scheme, the problems in the prior art are well solved. The catalyst of the present invention can be used in the industrial production of acetylene method vinyl acetate.

Description

technical field [0001] The invention relates to a vinyl acetate catalyst for the acetylene gas phase method, a preparation method of the catalyst, and a synthesis method of vinyl acetate. 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 acetate (PVAc), polyvinyl alcohol (PVOH), vinyl acetate-ethylene copolymer emulsion (VAE) or copolymer resin (EVA), vinyl acetate-vinyl chloride copolymer (EVC), polyacrylonitrile comonomer and acetal resin derivatives, in coatings, pastes, adhesives, vinylon, films, leather processing, synthetic fibers, soil Improvement and other aspects have extensive development and utilization value. With the continuous progress of production technology, its application field is still expanding. [0003] In 2011, the global production capacity of vinyl acetate reached 7.434 million tons per year, mainly concentrated in Asia, North Am...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J31/04C07C67/04C07C69/15
CPCB01J31/04B01J31/26C07C67/04C07C69/15
Inventor 邱鹏远杨运信张丽斌汪清泉陈仕萍何志群
Owner CHINA PETROLEUM & CHEM CORP
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