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Catalyst for acetylene method vinyl acetate synthesis

A vinyl acetate and catalyst technology, applied in the field of acetylene vapor phase vinyl acetate catalyst, to achieve the effect of improving catalyst activity and reducing benzene content

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

And academia and industry mainly focus on the problems such as improving catalyst activity and catalyst life-span for the research work of acetylene method vinyl acetate catalyst, for improving the selectivity of catalyst, especially the problem of reducing by-product benzene content has not been reported

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

[0041] (1) Nitrogen dopant carbon preparation

[0042] a) impregnation: 100ml coconut coconut activated carbon AC is placed in 100 ml of ammonia water (NH 3 · H 2 O) Aqueous solution (100 g / l) was immersed in 60 ° C for 3 h, and at room temperature at room temperature for 8 h, filtration washed to neutral, and the AC-1a was obtained after vacuum.

[0043] b) Roast: Place 100 ml of AC-1A in a tube atmosphere, in N 2 Under the atmosphere, the program was warmed to 600 ° C (the temperature rate of 10 ° C / min, N 2 After 30 ml / min), the constant temperature was 1 h, naturally cooled to room temperature, gave a nitrogen doped activated carbon AC-1A;

[0044] (2) Preparation of catalyst

[0045] a) formulation of impregnation liquid: 20.0 g of zinc acetate (molecular formula: Zn (CH) 3 COO) 2 Dissolved in deionized water, using acetic acid to adjust its pH of 4.85 to obtain 200 ml of impregnation liquid, wherein the zinc acetate content is 100 g / L;

[0046] b) Infiltration of the...

Embodiment 2

[0061] (1) Nitrogen dopant carbon preparation

[0062] a) impregnation: 100ml coconut cocktable activated carbon AC in 100 mL acetonitrile (C 2 Hide 3 N) In aqueous solution (100 g / l), the reflux treatment was impregnated at 60 ° C for 3 h, and at room temperature was stirred at room temperature, the washed washed to neutral, and the AC-1A was obtained after vacuum.

[0063] b) Roast: Place 100 ml of AC-1A in a tube atmosphere, in N 2 Under the atmosphere, the program was warmed to 600 ° C (the temperature rate of 10 ° C / min, N 2 After 30 ml / min), the constant temperature was 1 h, naturally cooled to room temperature, gave a nitrogen doped activated carbon AC-1A;

[0064] (2) Preparation of catalyst

[0065] a) formulation of impregnation liquid: 20.0 g of zinc acetate (molecular formula: Zn (CH) 3 COO) 2 Dissolved in deionized water, using acetic acid to adjust its pH of 4.85 to obtain 200 ml of impregnation liquid, wherein the zinc acetate content is 100 g / L;

[0066] b)...

Embodiment 3

[0081] (1) Nitrogen dopant carbon preparation

[0082] a) impregnation: 100ml coconut cushion activated carbon AC is placed in 100 ml urea (CH 4 N 2 O) Aqueous solution (100 g / l) was immersed in 60 ° C for 3 h, and at room temperature at room temperature for 8 h, filtration washed to neutral, and the AC-1a was obtained after vacuum.

[0083] b) Roast: Place 100 ml of AC-1A in a tube atmosphere, in N 2 Under the atmosphere, the program was warmed to 600 ° C (the temperature rate of 10 ° C / min, N 2 After 30 ml / min), the constant temperature was 1 h, naturally cooled to room temperature, gave a nitrogen doped activated carbon AC-1A;

[0084] (2) Preparation of catalyst

[0085] a) formulation of impregnation liquid: 20.0 g of zinc acetate (molecular formula: Zn (CH) 3 COO) 2 Dissolved in deionized water, using acetic acid to adjust its pH of 4.85 to obtain 200 ml of impregnation liquid, wherein the zinc acetate content is 100 g / L;

[0086] b) Infiltration of the vector: Nitro...

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Abstract

The invention relates to a catalyst for acetylene method vinyl acetate synthesis and a preparation method thereof, and mainly aims to solve the problem of high benzene content in a vinyl acetate product in the prior art. According to the technical schemes of the invention, the catalyst for acetylene method vinyl acetate synthesis comprises an active component and a carrier; the active component iszinc acetate; the carrier is nitrogen-doped activated carbon; the content of the N element in the carrier is 2.8-10wt%; and therefore, 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 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 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....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/04B01J27/24C07C67/04C07C69/15
CPCB01J31/04B01J27/24C07C67/04B01J2231/32C07C69/15
Inventor 邱鹏远杨运信张丽斌
Owner CHINA PETROLEUM & CHEM CORP
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