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Catalyst used for acetylene method vinyl acetate synthesis

A vinyl acetate and catalyst technology, applied in the field of vinyl acetate synthesis, can solve problems such as low catalyst activity, and achieve the effect of improving catalyst activity

Active Publication Date: 2014-08-06
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 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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Catalyst preparation

[0019] (a) Preparation of impregnation solution: 0.45 g diethylene glycol dimethyl ether, 0.45 g dimethyl phthalate and 18.0 g Zn(OAc) 2 Dissolve in a mixed solvent of methanol and water (90 wt% methanol, 10 wt% water) at 50°C to prepare 180 ml of impregnation solution, in which Zn(OAc) 2 The content is 100 g / L, and the total content of diether and aromatic ester is 5.0 g / L;

[0020] (a) Impregnation of the carrier: the selected activated carbon is coal-based cylindrical carbon (2.4 mm in diameter, 2 cm in length), with a specific surface area of ​​1200 cm 2 / g, the total adsorption pore volume is 0.7 cm 3 / g; add 100 ml of the activated carbon carrier to the above impregnation solution, impregnate at 70°C for 4 h, and filter;

[0021] (b) Drying: Dry the catalyst at 105°C for 6 h. The catalyst can be evaluated for catalyst performance after being loaded into the reactor.

[0022] (2) Characterization of physical properties

[0023]The Zn...

Embodiment 2】 to 【 Embodiment 5

[0034] Except for changing the types of cocatalyst diether and aromatic acid ester in the catalyst preparation process, other operating steps and evaluation conditions were the same as in Example 1. For the convenience of comparison, the catalyst preparation conditions are listed in Table 1, and the catalyst evaluation conditions and characterization evaluation results are listed in Table 2.

Embodiment 6

[0036] (1) Catalyst preparation

[0037] (a) Preparation of impregnation solution: 0.75 g diethylene glycol dimethyl ether, 0.15 g diethyl phthalate and 18.0 g Zn(OAc) 2 Dissolve in a mixed solvent of methanol and water (90 wt% methanol, 10 wt% water) at 50°C to prepare 180 ml of impregnation solution, in which Zn(OAc) 2 The content is 100 g / L, and the total content of diether and aromatic ester is 5.0 g / L;

[0038] (b) Impregnation of the carrier: the selected activated carbon is coal-based cylindrical carbon (diameter 2.4 mm, length 2 cm, specific surface area 1200 cm 2 / g, the total adsorption pore volume is 0.7 cm 3 / g; add 100 ml of the activated carbon carrier to the above impregnation solution, impregnate at 70°C for 4 h, and filter;

[0039] (c) Drying: Dry the catalyst at 105°C for 6 h, and the catalyst can be evaluated for catalyst performance after being loaded into the reactor.

[0040] The catalyst physical property characterization is the same as in Example 1...

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Abstract

The invention relates to a catalyst used for acetylene method vinyl acetate synthesis, and mainly solves a problem of low catalyst activity existing in the prior art. The catalyst used for acetylene method vinyl acetate synthesis comprises an active carbon carrier, zinc acetate, diether and aromatic acid ester, and the content of zinc acetate in the catalyst is 60-180g / L. The catalyst can well solve the problem, and can be used in the industrial production of the acetylene method vinyl acetate synthesis.

Description

technical field [0001] The invention relates to a catalyst for synthesizing vinyl acetate by acetylene method, a preparation method of the catalyst, and a synthesis method of vinyl acetate. Background technique [0002] The synthesis of vinyl acetate by the acetylene method refers to the reaction of acetylene and acetic acid as raw materials under the action of zinc acetate catalyst to produce vinyl acetate. In 1922, the German Wacker Company first used the method of acetylene vapor phase synthesis of VAM, which was later improved by the Hochst Company and put into industrial production. Its catalyst uses zinc acetate as the active component and activated carbon as the carrier, and it has been used until now. The disadvantages of the catalyst include rapid decline in activity, low production capacity, increase in by-products as the reaction temperature rises, and short service life of the catalyst. At the same time, the acetylene method has the advantages of simple technol...

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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