Vinyl acetate catalyst and application thereof

A vinyl acetate and catalyst technology, applied in the field of vinyl acetate synthesis, can solve the problems of low activity and selectivity of allyl acetate catalyst

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is the low problem of allyl acetate catalyst activity and selectivity synthesized in the prior art

Method used

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  • Vinyl acetate catalyst and application thereof
  • Vinyl acetate catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of modified carrier: Mix 0.80g of magnesium hydroxide powder with 1.0g of silica sol to obtain a coating solution, and spray the coating solution evenly on 1.1L of spherical SiO with a diameter of 5.6mm 2 on the carrier, dried at 100°C, and calcined in a muffle furnace at 500°C to obtain a carrier (X) coated with modified metal elements.

[0028] Preparation of catalyst: use sodium bicarbonate pH regulator and water as solvent to prepare pH 1.09, containing 4.23gPd and 2.05gAu chloropalladic acid, chloroauric acid aqueous solution to obtain 500ml of impregnating solution, which is immersed in the The catalyst precursor I is obtained on the support (X). After drying at 80°C, 105ml contains 22.5g Na 2 SiO 3 9H 2 The solution of O was fully mixed and aged for 24 hours to obtain the catalyst precursor II. Then use a solubility of 12% (in N 2 h 4 ·H 2 (2 in weight ratio) was reduced with 500ml of hydrazine hydrate, washed with water until there was no chl...

Embodiment 2

[0046] Preparation of modified carrier: Mix 0.40g of barium hydroxide powder with 1.0g of silica sol to obtain a coating solution, and spray the coating solution evenly on 1.1L of spherical SiO with a diameter of 5.6mm 2 on the carrier, dried at 100°C, and calcined in a muffle furnace at 500°C to obtain a carrier (X) coated with modified metal elements.

[0047] Preparation of catalyst: use sodium bicarbonate pH regulator and water as solvent to prepare pH 1.09, containing 4.23gPd and 2.05gAu chloropalladic acid, chloroauric acid aqueous solution to obtain 500ml of impregnating solution, which is immersed in the The catalyst precursor I is obtained on the support (X). After drying at 80°C, 105ml contains 22.5g Na 2 SiO 3 9H 2 The solution of O was fully mixed and aged for 24 hours to obtain the catalyst precursor II. Then use a solubility of 12% (in N 2 h 4 ·H 2 (2 in weight ratio) was reduced with 500ml of hydrazine hydrate, washed with water until there was no chlori...

Embodiment 3

[0050] Preparation of modified carrier: Mix 0.50g of calcium oxide powder and 1.0g of silica sol thoroughly to obtain a coating solution, and spray the coating solution evenly on 1.1L of spherical SiO with a diameter of 5.6mm 2 on the carrier, dried at 100°C, and calcined in a muffle furnace at 500°C to obtain a carrier (X) coated with modified metal elements.

[0051] Preparation of catalyst: use sodium bicarbonate pH regulator and water as solvent to prepare pH 1.09, containing 4.23gPd and 2.05gAu chloropalladic acid, chloroauric acid aqueous solution to obtain 500ml of impregnating solution, which is immersed in the The catalyst precursor I is obtained on the support (X). After drying at 80°C, 105ml contains 22.5g Na 2 SiO 3 9H 2 The solution of O was fully mixed and aged for 24 hours to obtain the catalyst precursor II. Then use a solubility of 12% (in N 2 h 4 ·H 2 (2 in weight ratio) was reduced with 500ml of hydrazine hydrate, washed with water until there was no...

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Abstract

The invention relates to a vinyl acetate catalyst, a preparation method thereof and a method for synthesizing vinyl acetate in order to mainly solve the problem of low activity and selectivity of a catalyst in the prior art. The problem is better solved through the technical scheme that the vinyl acetate catalyst comprises a carrier, active components and a catalyst promoter, wherein the active components include metal Pd and metal Au; the catalyst promoter is alkali metal acetate; the carrier is silicon dioxide provided with a coating on the surface; the coating is prepared from modified metal elements and a silicon dioxide adhesive for adhering the modified metal elements on the surface of the carrier; 0.01-1.00g/L of the modified metal elements are contained; the modified metal elements are at least one selected from IIA metal elements and IIIB metal elements. The vinyl acetate catalyst can be used for industrial production of vinyl acetate.

Description

technical field [0001] The invention relates to a vinyl acetate catalyst, a preparation method of the catalyst and a synthesis method of 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 is used as a catalyst and synthesized through a ga...

Claims

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Application Information

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