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Catalyst for acetylene-method vinyl acetate and synthesis method of vinyl acetate

A vinyl acetate and catalyst technology, which is applied in the field of acetylene gas phase vinyl acetate catalyst, can solve the problems of low by-product benzene content, high by-product benzene content, high by-product, etc., and achieve the effect of improving catalyst selectivity

Active Publication Date: 2015-03-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] One of the technical problems to be solved by the present invention is the high content of by-product benzene in the vinyl acetate product existing in the prior art, and a new vinyl acetate catalyst is provided, which has high selectivity and less by-products, especially by-products Features of low benzene content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Catalyst preparation

[0026] (a) Preparation of immersion solution: weigh 0.40 g of chromium acetate (molecular formula: Cr(CH 3 COO) 3 ) and 18.0 g zinc acetate (molecular formula: Zn(CH 3 COO) 2 ) solids were dissolved in pure water at 60°C to make 180 ml of impregnating liquid, and an appropriate amount of acetic acid was added to adjust the pH of the impregnating liquid to 4.85; the content of zinc acetate was 100 g / L, and the content of Cr(III) ions was 0.5 g / L ;

[0027] (b) Impregnation of the carrier: the selected activated carbon is coal-based cylindrical carbon (2.4 mm in diameter, 2 cm in length), with a specific surface area of ​​1200 cm 2 / g, the total adsorption pore volume is 0.7 cm 3 / g; Weigh 40.0 g of the activated carbon carrier and add it to the above impregnation solution, and impregnate it at 60°C for 4 hr;

[0028] (c) Drying: Dry the catalyst at 105°C for 4 hours to obtain the catalyst, and the catalyst performance evaluation can be ca...

Embodiment 2

[0041] (1) Catalyst preparation

[0042] (a) Preparation of immersion solution: weigh 0.34 g of chromium sulfate (molecular formula: Cr 2 (SO 4 ) 3 ) and 18.0 g zinc acetate (molecular formula: Zn(CH 3 COO) 2 ) solids were dissolved in pure water at 60°C to make 180 ml of impregnating liquid, and an appropriate amount of acetic acid was added to adjust the pH of the impregnating liquid to 4.85; the content of zinc acetate was 100 g / L, and the content of Cr(III) ions was 0.5 g / L ;

[0043] (b) Impregnation of the carrier: the selected activated carbon is coal-based cylindrical carbon (2.4 mm in diameter, 2 cm in length), with a specific surface area of ​​1200 cm 2 / g, the total adsorption pore volume is 0.7 cm 3 / g. Weigh 40.0 g of the activated carbon carrier and add it to the above impregnation solution, and impregnate at 60°C for 4 hr;

[0044] (c) Drying: Dry the catalyst at 105°C for 4 hours to obtain the catalyst, and the catalyst performance evaluation can be car...

Embodiment 3

[0057] (1) Catalyst preparation

[0058] (a) Preparation of immersion solution: weigh 0.41 g of chromium nitrate (molecular formula: Cr(NO 3 ) 3 ) and 18.0 g zinc acetate (molecular formula: Zn(CH 3 COO) 2 ) solids were dissolved in pure water at 60°C to make 180 ml of impregnating liquid, and an appropriate amount of acetic acid was added to adjust the pH of the impregnating liquid to 4.85; the content of zinc acetate was 100 g / L, and the content of Cr(III) ions was 0.5 g / L ;

[0059] (b) Impregnation of the carrier: the selected activated carbon is coal-based cylindrical carbon (2.4 mm in diameter, 2 cm in length), with a specific surface area of ​​1200 cm 2 / g, the total adsorption pore volume is 0.7 cm 3 / g. Weigh 40.0 g of the activated carbon carrier and add it to the above impregnation solution, and impregnate at 60°C for 4 hr;

[0060] (c) Drying: Dry the catalyst at 105°C for 4 hours to obtain the catalyst, and the catalyst performance evaluation can be carried...

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Abstract

The invention relates to a catalyst for acetylene-method vinyl acetate synthesis and a preparation method thereof. The catalyst is mainly used for solving the problem in the prior art that the content of a byproduct benzene in the vinyl acetate product is high. According to the catalyst for acetylene-method vinyl acetate synthesis, through the catalyst comprising a carrier which is activated carbon, an active ingredient which is zinc acetate and a cocatalyst which is a Cr(III) salt, the problem is better solved; and the catalyst can be applied to the industrial production of synthesizing 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 and other derivatives, in coatings, pastes, adhesives, vinylon, film, 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...

Claims

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Application Information

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IPC IPC(8): B01J31/04B01J31/34C07C69/15C07C67/04
Inventor 邱鹏远杨运信张丽斌
Owner CHINA PETROLEUM & CHEM CORP
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