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 activi

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

Example Embodiment

[0028] [Example 1]

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

[0030] (A) Choose BET specific surface area, pore volume and particle size to be 35 m respectively 2 / g、0.33cm 3 / g and 650μm silicon carbide particles as the base, the mixture of ethane and argon (the molar ratio of ethane to argon = 1:9) at 850℃, 1.2 atm and carbon source volumetric space velocity 150 h -1 Under the reaction conditions, the carrier precursor A is obtained through 100 g of the above silicon carbide particles for 3 h;

[0031] (B) The carrier precursor A is calcined in an air atmosphere at a temperature of 400 ℃ for 2 h to obtain the carrier precursor B;

[0032] (C) At 120℃, immerse 200 ml of carrier precursor B in an aqueous solution of nitric acid with a mass concentration of 60% for 6 h to obtain carrier precursor C;

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

Example Embodiment

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

[0052] Except for changing the carbon source during the preparation process of the carbon deposition silicon carbide support, other support preparation, catalyst preparation process and catalyst evaluation conditions are the same as in Example 1. To facilitate comparison, the preparation conditions and characterization of the support and the catalyst are listed in Table 1, and the catalyst evaluation conditions and results are listed in Table 2.

Example Embodiment

[0053] [Example 7]

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

[0055] (A) Choose BET specific surface area, pore volume and particle size to be 35 m respectively 2 / g、0.33cm 3 / g and 650μm silicon carbide particles as the substrate, the CCl 4 , Acetylene and argon gas mixture (CCl 4 , Acetylene and Argon Gas molar ratio=1:1:18) at 850℃, 1.2 atm and carbon source volumetric space velocity 150 h -1 Under the reaction conditions, the carrier precursor A is obtained through 100 g of the above silicon carbide particles for 3 h;

[0056] (B) The carrier precursor A is calcined in an air atmosphere at a temperature of 400 ℃ for 2 h to obtain the carrier precursor B;

[0057] (C) At 120℃, immerse 200 ml of carrier precursor B in an aqueous solution of nitric acid with a mass concentration of 60% for 6 h to obtain carrier precursor C;

[0058] (D) Take 15.0 g of polyvinyl alcohol (polymerization degree is 1700, alcoholysis degree is 88%), add it to 85.0 g of boiling p...

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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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