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Vinyl acetate catalyst during acetylene method, preparation method for catalyst and synthesis method for vinyl acetate

A vinyl acetate and catalyst technology, applied in the field of acetylene method vinyl acetate catalyst and its preparation and synthesis of vinyl acetate, can solve the problems of short life and low catalyst activity, achieve good technical effect, suppress loss and carbon deposition, and benefit The effect of catalyst activity

Active Publication Date: 2014-05-07
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 acetylene method vinyl acetate catalyst is provided, which has the characteristics of high activity

Method used

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  • Vinyl acetate catalyst during acetylene method, preparation method for catalyst and synthesis method for vinyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Catalyst preparation

[0021] (a) Preparation of impregnation solution: weigh 18.0 g Zn(OAc) 2 Solid, dissolved in 180 ml deionized water, heated to 60°C and stirred at constant temperature until completely dissolved, prepared as Zn(OAc) 2 For the impregnation solution with a content of 100.0 g / L, the pH value of the above impregnation solution was adjusted to 4.5 by HAc.

[0022] (b) Impregnation of the support: The selected SiC support has a specific surface area of ​​121.3 cm 2 / g, the pore volume with a pore diameter of 2-50 nm accounted for 62.9% of the total pore volume, 100 ml of the SiC carrier was added to the above impregnation solution, and the impregnation was carried out at a temperature of 75 °C.

[0023] (c) Drying: After impregnation, the catalyst was dried at 105 °C for 6 h, and the obtained catalyst could be evaluated for catalyst performance after being loaded into the reactor.

[0024] (2) Characterization of physical properties

[0025] Use ...

Embodiment 2

[0036] (1) Catalyst preparation

[0037] (a) Preparation of impregnation solution: weigh 18.0 g Zn(OAc) 2 Solid, 1.83 g FeCl 3 ·6H 2 O solid, dissolved in 180 ml deionized water, heated to 60°C and stirred at constant temperature until completely dissolved, prepared as Zn(OAc) 2 Content 100.0 g / L, FeCl 3 For the impregnating solution with a content of 6.11 g / L, the pH value of the above impregnating solution was adjusted to 4.5 by HAc.

[0038] (b) Impregnation of the support: The selected SiC support has a specific surface area of ​​121.3 cm 2 / g, the pore volume with a pore diameter of 2-50 nm accounted for 62.9% of the total pore volume, 100 ml of the SiC carrier was added to the above impregnation solution, and the impregnation was carried out at a temperature of 75 °C.

[0039] (c) Drying: After impregnation, the catalyst was dried at 105 °C for 6 h, and the obtained catalyst could be evaluated for catalyst performance after being loaded into the reactor.

[0040] O...

Embodiment 3

[0041] [Example 3] to [Example 11]

[0042] In addition to changing the Zn(OAc) in the immersion solution 2 Content, type and content of water-soluble iron salt, SiC supports with different specific surface areas and pore size distributions, impregnation temperature and drying temperature, other operating steps and catalyst evaluation conditions are the same as in Example 2. For the convenience of comparison, the preparation conditions of the catalysts are listed in Table 1, and the characterization and evaluation data of the catalysts are listed in Table 2.

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Abstract

The invention relates to a vinyl acetate catalyst during an acetylene method, a preparation method for the catalyst and a synthesis method for the vinyl acetate, and mainly solves the problem of low catalyst activity in the prior art. The catalyst comprises a carrier and an active constituent of Zn(OAc)2. The technical scheme adopting SiC as the carrier well solves the problem. Therefore, the catalyst can be used for industrial production of synthesizing vinyl acetate by adopting the acetylene method.

Description

technical field [0001] The invention relates to an acetylene method vinyl acetate catalyst, a preparation method thereof and a synthesis method of vinyl acetate. 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 we...

Claims

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Application Information

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IPC IPC(8): B01J31/30B01J31/28C07C69/15C07C67/04
Inventor 邱鹏远杨运信张丽斌
Owner CHINA PETROLEUM & CHEM CORP
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