Vinyl acetate catalyst and preparing method thereof

A vinyl acetate and catalyst technology, applied in the field of vinyl acetate catalysts and its preparation, can solve the problems of low activity and selectivity of vinyl acetate catalysts, and achieve the effects of increased selectivity, good technical effects, and increased active sites

Active Publication Date: 2017-02-22
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 activity and selectivity of vinyl acetate catalysts in the prior art, and a vinyl acetate catalyst is provided, which has the characteristics of high activity and selectivity

Method used

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  • Vinyl acetate catalyst and preparing method thereof
  • Vinyl acetate catalyst and preparing method thereof
  • Vinyl acetate catalyst and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Catalyst preparation

[0031] Step (a): get 1200ml of mixed aqueous solution of chloropalladic acid and chloroauric acid, wherein the content of palladium in the solution is 2.75g / L, and the content of gold is 0.625g / L, and adding a volume of 1100ml of spherical carbon dioxide with a diameter of 4 to 6mm Silicon carrier, obtains catalyst carrier I;

[0032] Step (b): 27.5g of sodium silicate nonahydrate was formulated into 100ml of aqueous solution and added to catalyst precursor I, mixed uniformly, left standing for 24hr, and then dried at 80°C for 8hr to prepare catalyst precursor II;

[0033] Step (c): Take 1200ml of a solution containing compound 1 with a concentration of 0.12g / L, add catalyst precursor II for impregnation, and obtain catalyst precursor III;

[0034] Step (d): reducing the catalyst precursor III in a hydrogen atmosphere, the hydrogen flow rate is 0.2ml / min, the pressure is 0.5MPa, and the reduction temperature is 200°C to obtain the catalyst pr...

Embodiment 2

[0049] (1) Catalyst preparation

[0050] Step (a): get 1200ml of mixed aqueous solution of chloropalladic acid and chloroauric acid, wherein the content of palladium in the solution is 2.75g / L, and the content of gold is 0.625g / L, and adding a volume of 1100ml of spherical carbon dioxide with a diameter of 4 to 6mm Silicon carrier, obtains catalyst carrier I;

[0051]Step (b): 27.5g of sodium silicate nonahydrate was formulated into 100ml of aqueous solution and added to catalyst precursor I, mixed uniformly, left standing for 24hr, and then dried at 80°C for 8hr to prepare catalyst precursor II;

[0052] Step (c): Take 1200ml of a solution containing compound 2 at a concentration of 0.12g / L, add catalyst precursor II for impregnation, and obtain catalyst precursor III;

[0053] Step (d): reducing the catalyst precursor III in a hydrogen atmosphere, the hydrogen flow rate is 0.2ml / min, the pressure is 0.5MPa, and the reduction temperature is 200°C to obtain the catalyst precu...

Embodiment 3

[0057] (1) Catalyst preparation

[0058] Step (a): get 1200ml of mixed aqueous solution of chloropalladic acid and chloroauric acid, wherein the content of palladium in the solution is 2.75g / L, and the content of gold is 0.625g / L, and adding a volume of 1100ml of spherical carbon dioxide with a diameter of 4 to 6mm Silicon carrier, obtains catalyst carrier I;

[0059] Step (b): 27.5g of sodium silicate nonahydrate was formulated into 100ml of aqueous solution and added to catalyst precursor I, mixed uniformly, left standing for 24hr, and then dried at 80°C for 8hr to prepare catalyst precursor II;

[0060] Step (c): Take 1200ml of a solution containing compound 1 and compound 2 at a concentration of 0.12g / L, wherein the mass ratio of compound 1 and compound 2 is 1:1, add catalyst precursor II for impregnation to obtain catalyst precursor III;

[0061] Step (d): reducing the catalyst precursor III in a hydrogen atmosphere, the hydrogen flow rate is 0.2ml / min, the pressure is 0...

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Abstract

The invention relates to a vinyl acetate catalyst, and aims to solve the problem that a current vinyl acetate catalyst has low activity and selectivity. According to the preparing method, the vinyl acetate catalyst is adopted, SiO2, Al2O3 or the mixture of the SiO2 and the Al2O3 is used as a carrier, and a loading activity component comprises metal palladium, metal gold, alkali metal acetate and at least one kind of dendritic macromolecular compound in compound 1 and compound 2 specified in the following formula, wherein the catalyst comprises 1-12g/L of palladium, 0.1-10g/L of gold, 10-100g/L of alkali metal acetate and 0.1-2.0 g/L of dendritic macromolecular compound and E t1-E t 16 are independently chosen from a technical scheme of C1-C3 alkyl group. During the preparing process of the vinyl acetate catalyst, the dendritic macromolecular compound is added after dipping palladium compound and gold compound and before a reduction step during the preparing of the catalyst.

Description

technical field [0001] The invention relates to a vinyl acetate catalyst and a preparation method thereof. Background technique [0002] Vinyl acetate is an important chemical raw material, widely used in the manufacture of polyvinyl alcohol, vinyl copolymer resins, adhesives, coatings, textile processing, paper coating, etc. The production process route of vinyl acetate mainly includes ethylene method and acetylene method. Among them, the ethylene method occupies a leading position because of its good manufacturability and economy. The production capacity of vinyl acetate using this method accounts for 82% of the total production capacity. In 1983, the United States completed the conversion of all ethylene routes. At present, most countries increase the production of vinyl acetate by rebuilding and expanding the original equipment and updating the catalyst. The development trend of the ethylene method can be summed up in several aspects: (1) The scale of the production equ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C07C69/15C07C67/055
Inventor 刘军晓杨运信张丽斌
Owner CHINA PETROLEUM & CHEM CORP
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