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

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

Example Embodiment

[0052] Example 1】

[0053] (1) Active carbon heat treatment: 300 ml of coconut cocktable activated carbon AC is placed in a tube atmosphere, in O 2 And N 2 Mixed atmosphere (mixed atmosphere 2 Under 5% of the volume, the program was raised to 400 ° C (the temperature rate of 10 ° C / min, the mixed gas flow rate was 30 ml / min), and after 3 h, naturally cooled to room temperature, and modified carbon AC1;

[0054] (2) ionic liquid treatment: Take 100 mL of 5.0 g / L of N-acetate ethylpyridine acetate ion liquid ([etaPy] AC), mixed with 100 mL modified carbon AC1, 25 ° C impregnated for 6 h, After filtration, the vacuum (vacuum pressure: 100 Pa) was dried at 40 ° C for 24 h to obtain an modified carbon finished product AC2;

[0055] (3) Preparation of catalyst

[0056] Preparation of impregnation: 20.0g of zinc acetate (molecular formula: Zn (CH) 3 COO) 2 Dissolved in deionized water, using acetic acid to adjust its pH of 4.70 to obtain 200 ml of impregnation liquid, wherein the z...

Example Embodiment

[0070] [Example 2]

[0071] (1) Active carbon heat treatment: 300 ml of coconut cocktable activated carbon AC is placed in a tube atmosphere, in O 2 And N 2 Mixed atmosphere (mixed atmosphere 2 Under 5% of the volume, the program was raised to 400 ° C (the temperature rate of 10 ° C / min, the mixed gas flow rate was 30 ml / min), and after 3 h, naturally cooled to room temperature, and modified carbon AC1;

[0072] (2) Ion liquid treatment: Take 100 ml of 5.0 g / L of N-acetate pyridine acetate ion liquid ([ETPY] AC), mixed with 100 ml of modified carbon AC1, 25 ° C impregnated for 6 h, after filtration The vacuum (vacuum pressure: 100Pa) was dried at 40 ° C for 24 h to obtain an modified carbon finished product AC2;

[0073] (3) Preparation of catalyst

[0074] Preparation of impregnation: 20.0g of zinc acetate (molecular formula: Zn (CH) 3 COO) 2 Dissolved in deionized water, using acetic acid to adjust its pH of 4.70 to obtain 200 ml of impregnation liquid, wherein the zinc ac...

Example Embodiment

[0088] [Example 3]

[0089] (1) Active carbon heat treatment: 300 ml of coconut cocktable activated carbon AC is placed in a tube atmosphere, in O 3 And N 2 Mixed atmosphere (mixed atmosphere 3 Under 5% of the volume, the program was raised to 400 ° C (the temperature rate of 10 ° C / min, the mixed gas flow rate was 30 ml / min), and after 3 h, naturally cooled to room temperature, and modified carbon AC1;

[0090] (2) ionic liquid treatment: Take 100ml 5.0 g / L N- (2-hydroxy-3-chloropropyl) pyridine acetate ion liquid ([HPY] AC) ethanol solution, mixed with 100 mL modified carbon AC1 , 25 ° C was immersed for 6 h, filtered, dried at 40 ° C in vacuo (vacuum pressure: 100Pa), resulting in modified carbon finished product AC2;

[0091] (3) Preparation of catalyst

[0092] Preparation of impregnation: 20.0g of zinc acetate (molecular formula: Zn (CH) 3 COO) 2 Dissolved in deionized water, using acetic acid to adjust its pH of 4.70 to obtain 200 ml of impregnation liquid, wherein th...

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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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