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Catalyst for synthesis of vinyl acetate by acetylene method and synthetic 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 problem of low catalyst activity, achieve the effects of improving catalyst activity, improving electronic structure, and good technical effects

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

[0009] One of the technical problems to be solved by the present invention is the problem of low catalyst activity in the prior art, and a new vinyl acetate catalyst is provided, which has the characteristics of high activity

Method used

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  • Catalyst for synthesis of vinyl acetate by acetylene method and synthetic method of vinyl acetate
  • Catalyst for synthesis of vinyl acetate by acetylene method and synthetic method of vinyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of carbon-deposited silicon carbide carrier

[0030] (a) The BET specific surface area, pore volume and particle size are selected to be 35 m 2 / g, 0.33cm 3 / g and 650 μm silicon carbide particles as the substrate, the mixed gas of ethane and argon (the molar ratio of ethane to argon = 1:9) was heated at 850 °C, 1.2 atm and the carbon source volume space velocity was 150 h -1 Under reaction conditions, the carrier precursor A is obtained by passing 100 g of the above-mentioned silicon carbide particles for 3 h;

[0031] (b) Carrier precursor A was calcined at 400 °C in air for 2 h to obtain carrier precursor B;

[0032] (c) Under the condition of 120°C, 200 ml carrier precursor B was immersed in 60% nitric acid aqueous solution for 6 h to obtain carrier precursor C;

[0033] (d) Take 15.0 g of polyvinyl alcohol (the degree of polymerization is 1700, and the degree of alcoholysis is 88%), add it to 85.0 g of boiling pure water, stir to obtain a viscous...

Embodiment 2

[0051] [Example 2] to [Example 6]

[0052] Except for changing the carbon source in the preparation process of the carbon-deposited silicon carbide carrier, other carrier preparation, catalyst preparation process and catalyst evaluation conditions are the same as in Example 1. For the convenience of comparison, the preparation conditions and characterization of the carrier and catalyst are listed in Table 1, and the evaluation conditions and results of the catalyst are listed in Table 2.

Embodiment 7

[0054] (1) Preparation of carbon-deposited silicon carbide carrier

[0055] (a) The BET specific surface area, pore volume and particle size are selected to be 35 m 2 / g, 0.33cm 3 / g and 650μm silicon carbide particles as the substrate, the CCl 4 , mixed gas of acetylene and argon (CCl 4 , acetylene to argon molar ratio = 1:1:18) at 850°C, 1.2 atm and carbon source volume space velocity 150 h -1 Under reaction conditions, the carrier precursor A is obtained by passing 100 g of the above-mentioned silicon carbide particles for 3 h;

[0056] (b) Carrier precursor A was calcined at 400 °C in air for 2 h to obtain carrier precursor B;

[0057] (c) Under the condition of 120°C, 200 ml carrier precursor B was immersed in 60% nitric acid aqueous solution for 6 h to obtain carrier precursor C;

[0058] (d) Take 15.0 g of polyvinyl alcohol (the degree of polymerization is 1700, and the degree of alcoholysis is 88%), add it to 85.0 g of boiling pure water, stir to obtain a viscous ...

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Abstract

The invention relates to a catalyst for synthesis of vinyl acetate by an acetylene method and a preparation method thereof, and mainly solves the problem of low catalyst activity in the prior art. The catalyst is a catalyst used for synthesis of the vinyl acetate by use of the acetylene method, and comprises a carrier and an active component, the carrier is carbon deposited silicon carbide, and the active component is zinc acetate; and by use of the technical scheme, the problem of the low catalyst activity in the prior art can be solved. The catalyst can be used for industrial production of synthesis of the vinyl acetate by use of 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 one of the organic chemical raw materials with the largest output in the world, and is widely used in the production of polyvinyl acetate, polyvinyl alcohol, coatings, pastes, adhesives, vinylon, films, vinyl A series of chemical products such as copolymer resin and acetal resin, and their application fields are still expanding. According to the statistics of the Stanford Research Institute (SRI), the global production capacity of vinyl acetate reached 6.13 million t / a in 2007. It is estimated that the average annual growth rate of global production capacity will be 3.2% from 2007 to 2012, and the average operating rate of the industry will be about 81%. Asia and the Middle East have become the global vinyl...

Claims

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Application Information

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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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