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Catalyst for production of ethylene method vinyl acetate

A method of vinyl acetate and catalyst technology, which is applied in the direction of physical/chemical process catalysts, carboxylate preparation, metal/metal oxide/metal hydroxide catalysts, etc., and can solve the problems of low activity and selectivity of vinyl acetate catalysts, Achieve the effect of improving activity and stability, improving yield and selectivity

Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is the low problem of vinyl acetate catalyst activity and selectivity synthesized in the prior art

Method used

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  • Catalyst for production of ethylene method vinyl acetate
  • Catalyst for production of ethylene method vinyl acetate
  • Catalyst for production of ethylene method vinyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Catalyst preparation:

[0032] (1) Using sodium bicarbonate pH regulator and water as a solvent to prepare a pH of 1.09, containing 3.85gPd and 1.87gAu of chloropalladic acid and chloroauric acid aqueous solution to obtain 500ml of impregnation solution, which is impregnated on the carrier in a rotating pot 1.0L of spherical SiO with a diameter of 5.6mm 2 Catalyst precursor I is obtained on the carrier;

[0033] (2) After drying at 80°C, 98ml contains 20.5g Na 2 SiO 3 9H 2 The solution of O is fully mixed, aged for 24h to obtain catalyst precursor II;

[0034] (3) With a solubility of 12% (in N 2 h 4 ·H 2 (2 in weight ratio) is reduced by 500ml hydrazine hydrate, washed with water to no chloride ion, and dried at 90° C. to obtain catalyst precursor III;

[0035] (4) Cobalt acetate (Co(OA) containing 1.27g CoC ) 2 4H 2 O) 150ml of the aqueous solution is impregnated on the precursor III, vacuum-dried at 110°C, and calcined at 400°C to obtain the catalyst precur...

Embodiment 2

[0042] Catalyst preparation:

[0043] (1) Using sodium bicarbonate pH regulator and water as a solvent to prepare a pH of 1.09, containing 3.85gPd and 1.87gAu of chloropalladic acid and chloroauric acid aqueous solution to obtain 500ml of impregnation solution, which is impregnated on the carrier in a rotating pot 1.0L of spherical SiO with a diameter of 5.6mm 2 Catalyst precursor I is obtained on the carrier;

[0044] (2) After drying at 80°C, 98ml contains 20.5g Na 2 SiO 3 9H 2 The solution of O is fully mixed, aged for 24h to obtain catalyst precursor II;

[0045] (3) With a solubility of 12% (in N 2 h 4 ·H 2 (2 in weight ratio) is reduced by 500ml hydrazine hydrate, washed with water to no chloride ion, and dried at 90° C. to obtain catalyst precursor III;

[0046] (4) The stannous chloride (SnCl) containing 1.27gSn 2 2H 2 O) 150ml of the aqueous solution is impregnated on the precursor III, vacuum-dried at 110°C, and calcined at 400°C to obtain the catalyst prec...

Embodiment 3

[0065] Catalyst preparation:

[0066] (1) Using sodium bicarbonate pH regulator and water as a solvent to prepare a pH of 1.09, containing 3.85gPd and 1.87gAu of chloropalladic acid and chloroauric acid aqueous solution to obtain 500ml of impregnation solution, which is impregnated on the carrier in a rotating pot 1.0L spherical Al with a diameter of 5.6mm 2 o 3 Catalyst precursor I is obtained on the carrier;

[0067] (2) After drying at 80°C, 98ml contains 20.5g Na 2 SiO 3 9H 2 The solution of O is fully mixed, aged for 24h to obtain catalyst precursor II;

[0068] (3) With a solubility of 12% (in N 2 h 4 ·H 2 (2 in weight ratio) is reduced by 500ml hydrazine hydrate, washed with water to no chloride ion, and dried at 90° C. to obtain catalyst precursor III;

[0069] (4) Cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) 150ml of the aqueous solution is impregnated on the precursor III, vacuum-dried at 110°C, and calcined at 400°C to obtain the catalyst precursor IV;

[0070]...

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Abstract

The present invention relates to a catalyst for production of ethylene method vinyl acetate. A purpose of the present invention is mainly to solve the problems of not high activity and not high selectivity of the catalyst in the prior art. The technical scheme of the present invention comprises that the catalyst comprises a carrier, an active component and a co-catalyst, wherein the carrier is SiO2, Al2O3 or a mixture thereof, the co-catalyst is an alkali metal acetate, and the active component comprises a metal Pd, a metal Au and at least one metal element selected from an iron-based metal and a IVA metal. With the technical scheme, the problems in the prior art are well solved. The catalyst of the present invention can be used in the industrial production of vinyl acetate.

Description

technical field [0001] The invention relates to a catalyst used for preparing ethylene-method vinyl acetate, a preparation method of the catalyst and a synthesis method of ethylene-method vinyl acetate. Background technique [0002] Vinyl acetate (VAc) is one of the 50 largest chemical raw materials in the world. Polyvinyl alcohol (PVA), polyvinyl acetate (PVAc) emulsion, and vinyl acetate-ethylene copolymer emulsion can be produced by self-polymerization or copolymerization with other monomers. (VAE) or copolymer resin (EVA), vinyl acetate-vinyl chloride copolymer (EVC) and other derivatives. These derivatives are widely used in adhesives, architectural coatings, sizing agents for paper or fabrics, coatings, inks, leather processing, fiber processing, emulsifiers, water-soluble films, and soil conditioners. The main method of producing ethylene vinyl acetate in the world today is to use ethylene, oxygen and acetic acid as raw materials, and use Pd-Au-KOAc / SiO 2 The system...

Claims

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Application Information

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IPC IPC(8): B01J31/28C07C67/055C07C69/15
CPCC07C67/055B01J23/14B01J23/44B01J23/52B01J23/745B01J23/75B01J23/755B01J31/0201B01J31/28B01J35/19C07C69/15
Inventor 查晓钟杨运信
Owner CHINA PETROLEUM & CHEM CORP
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