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Catalyst for vinyl acetate synthesis by acetylene method and preparation method thereof

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 and reducing benzene content

Active Publication Date: 2015-04-29
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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  • Catalyst for vinyl acetate synthesis by acetylene method and preparation method thereof
  • Catalyst for vinyl acetate synthesis by acetylene method and preparation method thereof
  • Catalyst for vinyl acetate synthesis by acetylene method and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Catalyst preparation

[0028] (a) Preparation of impregnation solution: weigh 7.44 ml of magnesium acetate solution (molecular formula: Mg(CH 3 COO) 2 , concentration: 1 mol / L) and 18.0 g zinc acetate (molecular formula: Zn(CH 3 COO) 2 ) solid at 60 o Dissolve C in water to prepare 180 ml of aqueous solution, adjust the pH value to 4.85 with acetic acid to obtain an impregnation solution; wherein the content of zinc acetate is 100 g / L, and the content of Mg element is 1.0 g / L;

[0029] (b) Impregnation of the carrier: Weigh 120 ml of coal-based columnar carbon (bulk density: 0.35 g / ml, BET specific surface: 1200 cm 2 / g, total pore volume: 0.7 cm 3 / g); add to the above impregnation solution, and impregnate at 60 °C for 4 hr;

[0030] (c) Drying: Dry the catalyst at 105° C. for 4 hrs in a blast drying oven to obtain the catalyst.

[0031] The main preparation conditions of the catalyst are listed in Table 1, and the physical data of the catalyst are listed in...

Embodiment 2

[0042] (1) Catalyst preparation

[0043] (a) Preparation of impregnation solution: weigh 0.71 g of calcium acetate solid (molecular formula: Ca(CH 3 COO) 2 ) and 18.0 g zinc acetate (molecular formula: Zn(CH 3 COO) 2 ) solid at 60 o Dissolve C in water to prepare 180 ml of aqueous solution, adjust the pH value to 4.85 with acetic acid to obtain an impregnating solution; the content of zinc acetate is 100 g / L, and the content of Ca element is 1.0 g / L;

[0044] (b) Impregnation of the carrier: Weigh 120 ml of coal-based columnar carbon (bulk density: 0.35 g / ml, BET specific surface: 1200 cm 2 / g, total pore volume: 0.7 cm 3 / g); add to the above impregnation solution, and impregnate at 60 °C for 4 hr;

[0045] (c) Drying: Dry the catalyst at 105° C. for 4 hrs in a blast drying oven to obtain the catalyst.

[0046] The main preparation conditions of the catalyst are listed in Table 1, and the physical data of the catalyst are listed in Table 2.

[0047] (2) Catalyst perfo...

Embodiment 3

[0050] (1) Catalyst preparation

[0051] (a) Preparation of impregnation solution: weigh 0.33 g of barium acetate solid (molecular formula: Ba(CH 3 COO) 2 ) and 18.0 g zinc acetate (molecular formula: Zn(CH 3 COO) 2 ) solid at 60 o Dissolve C in water to prepare 180 ml of aqueous solution, adjust the pH value to 4.85 with acetic acid to obtain an impregnating solution; wherein the content of zinc acetate is 100 g / L, and the content of Ba element is 1.0 g / L;

[0052] (b) Impregnation of the carrier: Weigh 120 ml of coal-based columnar carbon (bulk density: 0.35 g / ml, BET specific surface: 1200 cm 2 / g, total pore volume: 0.7 cm 3 / g); add to the above impregnation solution, and impregnate at 60 °C for 4 hr;

[0053] (c) Drying: Dry the catalyst at 105° C. for 4 hrs in a blast drying oven to obtain the catalyst.

[0054] The main preparation conditions of the catalyst are listed in Table 1, and the physical data of the catalyst are listed in Table 2.

[0055] (2) Catalys...

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Abstract

The invention relates to a catalyst for vinyl acetate synthesis by an acetylene method and a preparation method thereof as well as a synthesis method of vinyl acetate, and aims at mainly solving the problem in the prior art that the content of byproduct benzene in a vinyl acetate product is high. The problem is well solved by adopting the technical scheme that the catalyst comprises a carrier, an active component and a cocatalyst, wherein the carrier is active carbon, the active component is zinc acetate, and the content of zinc acetate in the catalyst is 80g / L-240g / L. The catalyst is characterized in that the cocatalyst of the catalyst is acetate of main group metal elements in the periodic table of elements, wherein the main group metal elements are selected from at least one of IIA group metal elements or IVA group metal elements. The catalyst can be used for industrial production of the synthesis of vinyl acetate by the acetylene method.

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