Catalyst for vinyl acetate synthesis and a preparation method thereof

A vinyl acetate and catalyst technology, applied in the field of acetylene process vinyl acetate catalyst and its preparation, can solve the problems of short life, low catalyst activity and the like

Active Publication Date: 2014-07-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is the problem of low catalyst activity and short life in the prior art, and a new catalyst for the synthesis of vinyl acetate by acetylene method is provided, which has the characteristics of high activity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of porous carbon materials:

[0024] Step (a) Take 1000g of carbon black with an average particle size of 50 nm and 400g of polyvinyl alcohol powder (the weight-average molecular weight of polyvinyl alcohol is 200,000), mix and stir evenly, then add 250 grams of water, knead for 4 hours, and extrude the diameter 2.4 mm long columnar carrier precursor I 1.5 cm ;)

[0025] Step (b) Take 1000ml of the above-mentioned columnar precursor and carbonize it at 1200°C for 10hr in a nitrogen atmosphere to obtain the carrier precursor II;

[0026] Step (c) Soak the carrier precursor II in a 10wt% hydrochloric acid aqueous solution for 4 hours, and dry at 80°C for 10 hours to obtain a catalyst carrier.

[0027] For the convenience of comparison, the main preparation conditions of the vectors are listed in Table 1.

[0028] (2) Preparation of catalyst

[0029] Step (a) Weigh 18.0 g Zn(OAc) 2 Solid and 0.036g (BiO) 2 CO 3 , water as a solvent and acetic acid as ...

Embodiment 2

[0045] (1) Preparation of porous carbon materials:

[0046] Step (a) Take 1000g of carbon black with an average particle size of 8 nm and 400g of methylcellulose powder (the weight-average molecular weight of methylcellulose is 120,000), mix and stir evenly, then add 250g of water, knead for 4 hours, and extrude Forming a diameter of 2.4 mm and a length of 1.5 cm column carrier precursor I;

[0047] Step (b) taking 1000ml of the above-mentioned columnar precursor and carbonizing it for 10hr at a temperature of 1200°C in a nitrogen atmosphere to obtain the carrier precursor II;

[0048] Step (c) Soak the carrier precursor II in a 10wt% hydrochloric acid aqueous solution for 4 hours, and dry at 80°C for 10 hours to obtain a catalyst carrier.

[0049] For the convenience of comparison, the main preparation conditions of the vectors are listed in Table 1.

[0050] (2) Preparation of catalyst

[0051] Step (a) Weigh 27.0 g Zn(OAc) 2 Solid and 0.054g (BiO) 2 CO 3 , using water a...

Embodiment 3

[0056] (1) Preparation of porous carbon materials:

[0057] Step (a) Take 1000g of carbon black with an average particle size of 200 nm and 400g of polyvinyl alcohol powder and methyl cellulose powder in a weight ratio of 1:0.1 (the weight average molecular weight of polyvinyl alcohol is 170000, and the weight of methyl cellulose is The average molecular weight is 80000) mixing and stirring evenly, then adding 250 grams of water, kneading for 4 hours, and extruding a columnar carrier precursor I with a diameter of 2.4 mm and a length of 1.5 cm;

[0058] Step (b) Take 1000ml of the above-mentioned columnar precursor and carbonize it at 1200°C for 10hr in a nitrogen atmosphere to obtain the carrier precursor II;

[0059] Step (c) Soak the carrier precursor II in a 10wt% hydrochloric acid aqueous solution for 4 hours, and dry at 80°C for 10 hours to obtain a catalyst carrier.

[0060] For the convenience of comparison, the main preparation conditions of the vectors are listed in...

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Abstract

The invention relates to a catalyst for vinyl acetate synthesis by use of acetylene method and a preparation method thereof, and mainly solves the problem of low activity of catalysts for vinyl acetate synthesis by use of the acetylene method in the prior art; the catalyst for vinyl acetate synthesis comprises a carrier and active components, the carrier is loaded with the active components, the active components are zinc acetate and bismuth subcarbonate, the catalyst comprises 90-180g / L of the zinc acetate and 0.1-0.3g / L of the bismuth subcarbonate, the carrier of the catalyst is a porous carbon material, the pore volume of the porous carbon material with the pore diameter of 3-10nm accounts for 20%-80% of the total pore volume, and the pore volume of the porous carbon material with the pore diameter of 30-40nm accounts for 10%-60% of the total pore volume; by use of the technical scheme, the problem of low activity of catalysts for vinyl acetate synthesis in the prior art can be well solved, and the catalyst for vinyl acetate synthesis can be used for industrial production of vinyl acetate synthesis by use of the acetylene method.

Description

technical field [0001] The invention relates to an acetylene method vinyl acetate catalyst and a preparation method thereof. Background technique [0002] Vinyl acetate, also known as vinyl acetate, or VAc for short, is one of the 50 largest organic chemical raw materials in the world. As an important organic chemical raw material, it is mainly used in the production of polyvinyl acetate, polyvinyl alcohol, ethylene-vinyl acetate copolymer, Derivatives such as vinyl chloride-vinyl acetate copolymer and polyacrylonitrile comonomer can be used in chemical products such as coatings, pastes, adhesives, vinylon, films, vinyl copolymer resins, and acetal resins. Constantly expanding. At present, there are two main technologies for producing vinyl acetate: ethylene gas phase method and acetylene gas phase method, and the acetylene gas phase method includes natural gas acetylene method and calcium carbide acetylene method. In the central and western regions where calcium carbide r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C07C69/15C07C67/04
Inventor 刘军晓杨运信张丽斌
Owner CHINA PETROLEUM & CHEM CORP
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