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Unsaturated acetate catalyst and preparation method thereof

A catalyst and unsaturated technology, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds. It can solve the problems of low activity and selectivity of unsaturated acetates, and achieve high selectivity and good technical effects. Effect

Active Publication Date: 2020-04-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is the problem of low activity and selectivity of unsaturated acetate in the prior art, and a kind of unsaturated acetate catalyst is provided, which has the characteristics of high activity and selectivity

Method used

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  • Unsaturated acetate catalyst and preparation method thereof
  • Unsaturated acetate catalyst and preparation method thereof
  • Unsaturated acetate catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Catalyst preparation

[0031] Step (a): get the solution 1200ml that contains chloropalladic acid and chloroauric acid, wherein the content of palladium in the solution is 2.75 grams per liter, and the content of gold is 0.625 grams per liter, adding a volume of 1100ml and a diameter of 5.0mm spherical silica carrier to obtain catalyst precursor 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): reducing the catalyst precursor II 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 precursor III;

[0034] Step (d): take 1200ml of potassium acetate aqueous solution, wherein the content of potassium acetate is 27.5 g / L, and add L1 with a mass of 0.33 g to the abo...

Embodiment 2

[0049] (1) Catalyst preparation

[0050] Step (a): get the solution 1200ml that contains chloropalladic acid and chloroauric acid, wherein the content of palladium in the solution is 2.75 grams per liter, and the content of gold is 0.625 grams per liter, adding a volume of 1100ml and a diameter of 5.0mm spherical silica carrier to obtain catalyst precursor 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): reducing the catalyst precursor II 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 precursor III;

[0053] Step (d): take 1200ml potassium acetate aqueous solution, wherein potassium acetate content is 27.5 grams / liter, add the L2 that quality is 0.33g in above-men...

Embodiment 3

[0056] (1) Catalyst preparation

[0057] Step (a): get the solution 1200ml that contains chloropalladic acid and chloroauric acid, wherein the content of palladium in the solution is 2.75 grams per liter, and the content of gold is 0.625 grams per liter, adding a volume of 1100ml and a diameter of 5.0mm spherical silica carrier to obtain catalyst precursor I;

[0058] 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;

[0059] Step (c): reducing the catalyst precursor II 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 precursor III;

[0060] Step (d): take 1200ml of potassium acetate aqueous solution, wherein the content of potassium acetate is 27.5 g / L, and add L3 with a mass of 0.20 g to the abo...

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Abstract

The invention relates to an unsaturated acetate catalyst and a preparation method thereof, and mainly solves the problems of low activity and low selectivity of the existing unsaturated acetate catalyst. The unsaturated acetate catalyst has the technical scheme that the unsaturated acetate catalyst uses SiO2, Al2O3 or a mixture of the SiO2 and the Al2O3 as carriers; loaded active ingredients comprise metal palladium, metal gold, alkali metal acetate, acid capable of being ionized in water into L negative ions or alkali metal salt of the acid, wherein the L is selected from at least one kind of ions L1 to L4 shown by the following formulas. The problem is better solved. The unsaturated acetate catalyst can be used for production of unsaturated acetate industrial devices. The formulas are shown in the specification.

Description

technical field [0001] The invention relates to an unsaturated acetate catalyst and a preparation method thereof. Background technique [0002] Common unsaturated acetates are vinyl acetate and allyl acetate. [0003] Unsaturated acetate is an important chemical raw material, especially vinyl acetate. For example, vinyl acetate is 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/04C07C67/055C07C69/15C07C69/155
CPCB01J31/0298C07C67/055C07C69/15C07C69/155
Inventor 刘军晓杨运信张丽斌
Owner CHINA PETROLEUM & CHEM CORP
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