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Acetylene process vinyl acetate catalyst

A vinyl acetate and catalyst technology, which is applied in the field of acetylene vapor phase vinyl acetate catalyst, can solve the problems of low benzene content of by-products and high content of by-product benzene, and achieve the effects of reducing benzene content, improving selectivity, and good technical effects

Active Publication Date: 2016-04-20
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 the characteristics of low content of by-product benzene

Method used

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  • Acetylene process vinyl acetate catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Catalyst preparation

[0030] (a) Impregnation: take Fe(NO 3 ) 3 100ml of aqueous solution is impregnation solution A (Fe 3+ Concentration: 2.0g / L), impregnate 100ml of coal-based columnar carbon with a diameter of 2.4mm and a length of 2cm at a room temperature of 25°C (BET specific surface 1200cm 2 / g, the total adsorption pore volume is 0.7cm 3 / g) 3h;

[0031] (b) drying: after drying in a vacuum oven at 90° C. for 4 hours, the carrier precursor is obtained;

[0032] (c) reduction: in H 2 / N 2 Mixed gas (H 2 Molar concentration is 10%) after reduction at 200°C for 1h, in N 2 Cool to room temperature in the atmosphere to obtain a modified activated carbon carrier;

[0033] (d) Preparation of immersion solution: Weigh 18.0g of zinc acetate (molecular formula: Zn(CH 3 COO) 2 ) solid was dissolved in pure water at 60°C to prepare 180ml of impregnating liquid, and acetic acid was used to adjust the pH value of the impregnating liquid to 4.85 to obtain impr...

Embodiment 2

[0048] (1) Catalyst preparation

[0049] (a) Impregnation: take CoCl-containing 2 100ml of aqueous solution is impregnation solution A (Co 2+ Concentration: 2.0g / L), impregnate 100ml of coal-based columnar carbon with a diameter of 2.4mm and a length of 2cm at a room temperature of 25°C (BET specific surface 1200cm 2 / g, the total adsorption pore volume is 0.7cm 3 / g) 3h;

[0050] (b) drying: after drying in a vacuum oven at 90° C. for 4 hours, the carrier precursor is obtained;

[0051] (c) reduction: in H 2 / N 2 Mixed gas (H 2 Molar concentration is 10%) after reduction at 200°C for 1h, in N 2 Cool to room temperature in the atmosphere to obtain a modified activated carbon carrier;

[0052] (d) Preparation of immersion solution: Weigh 18.0g of zinc acetate (molecular formula: Zn(CH 3 COO) 2 ) solid was dissolved in pure water at 60°C to prepare 180ml of impregnating liquid, and acetic acid was used to adjust the pH value of the impregnating liquid to 4.85 to obtain...

Embodiment 3

[0059] (1) Catalyst preparation

[0060] (a) Impregnation: take Ni(NO 3 ) 2 100ml of aqueous solution is impregnation solution A (Ni 2+ Concentration: 2.0g / L), impregnate 100ml of coal-based columnar carbon with a diameter of 2.4mm and a length of 2cm at a room temperature of 25°C (BET specific surface 1200cm 2 / g, the total adsorption pore volume is 0.7cm 3 / g) 3h;

[0061] (b) drying: after drying in a vacuum oven at 90° C. for 4 hours, the carrier precursor is obtained;

[0062] (c) reduction: in H 2 / N 2 Mixed gas (H 2 Molar concentration is 10%) after reduction at 200°C for 1h, in N 2 Cool to room temperature in the atmosphere to obtain a modified activated carbon carrier;

[0063] (d) Preparation of immersion solution: Weigh 18.0g of zinc acetate (molecular formula: Zn(CH 3 COO) 2 ) solid was dissolved in pure water at 60°C to prepare 180ml of impregnating liquid, and acetic acid was used to adjust the pH value of the impregnating liquid to 4.85 to obtain impr...

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Abstract

The invention relates to a catalyst for acetylene process vinyl acetate synthesis and a preparation method thereof, and mainly solves the problem of high content of byproduct benzene in a vinyl acetate product in the prior art. According to a technical scheme, the catalyst for acetylene process vinyl acetate synthesis comprises an active component and a carrier, the active component is zinc acetate, and the carrier is activated carbon modified by VIII group metals. The catalyst well solves the problem, and can be used in the industrial production of acetylene process 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): B01J23/80B01J23/60B01J23/89C07C69/15C07C67/04
Inventor 邱鹏远杨运信张丽斌
Owner CHINA PETROLEUM & CHEM CORP
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