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Catalyst for producing vinyl acetate by ethylene process

A method of vinyl acetate and catalyst technology, which is applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, organic chemistry, etc., can solve the problems of low activity and selectivity of vinyl acetate catalysts, and achieve improvement Effects of activity and stability, yield enhancement 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 producing vinyl acetate by ethylene process
  • Catalyst for producing vinyl acetate by ethylene process
  • Catalyst for producing vinyl acetate by ethylene process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Catalyst preparation:

[0035] (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;

[0036] (2) After drying at 80°C, 98ml contains 20.5g Na 2 SiO 3 9H 2 The solution of O is fully mixed, and aging 24h obtains catalyst precursor II;

[0037] (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;

[0038] (4) Lanthanum acetate (La(OA) containing 1.48gLa C ) 3 ·5H 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 pre...

Embodiment 2

[0045] Catalyst preparation:

[0046] (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;

[0047] (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;

[0048] (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;

[0049] (4) Immerse 150ml of bismuth ammonium citrate aqueous solution containing 1.48gBi on the precursor III, vacuum dry at 110°C, and roast at 400°C to obtain the catalyst precursor IV;

[0050] (5) Dissolve...

Embodiment 3

[0068] Catalyst preparation:

[0069] (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;

[0070] (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;

[0071] (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;

[0072] (4) Cerium acetate containing 1.48gCe (Ce(OA C ) 3 ·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 prec...

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Abstract

The invention relates to a catalyst used for producing vinyl acetate by an ethylene process. The catalyst used for producing vinyl acetate by the ethylene process mainly solves the problems that in the prior art, the activity and selectivity of a catalyst are not high. According to the technical scheme, the catalyst used for producing vinyl acetate by the ethylene process comprises a carrier, active components and an auxiliary catalyst, wherein SiO2, Al2O3 or a mixture of SiO2 and Al2O3 is adopted as the carrier, the auxiliary catalyst is alkali metal acetate, and the active components comprise metal Pd, metal Au and at least one metal element selected from lanthanide series metal and VA metal, the problems are favorably solved, and the catalyst used for synthesizing vinyl acetate by the ethylene process can be used in industrial production of vinyl acetate.

Description

technical field [0001] The invention relates to a catalyst for producing 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 is u...

Claims

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Application Information

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IPC IPC(8): B01J31/28C07C69/15C07C67/055
Inventor 查晓钟杨运信
Owner CHINA PETROLEUM & CHEM CORP