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Vinyl acetate catalyst and preparation method thereof and vinyl acetate synthesis method

An ethylene-based vinyl acetate and catalyst technology, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, and can solve the problems of low space-time yield and selectivity of catalysts

Active Publication Date: 2015-03-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] One of the technical problems to be solved by the present invention is the problem of low space-time yield and selectivity of the catalyst in the prior art, and a new vinyl acetate catalyst is provided, which has the characteristics of high space-time yield and selectivity

Method used

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  • Vinyl acetate catalyst and preparation method thereof and vinyl acetate synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Carrier SiO 2 pre-processing

[0031] (a) Take NH 4 800 ml of aqueous solution of F is impregnation solution A (F ion concentration: 3.0 g / L), impregnated with 1000 ml of spherical silica carrier with a diameter of 5.8 mm (BET specific surface 175 cm 2 / g, the pore volume is 0.7 cm 3 / g) 3hr to obtain catalyst precursor I;

[0032] (b) Put the above-mentioned carrier precursor I in a blast drying oven, 105 o Drying under C conditions for 4 hr to obtain carrier precursor II;

[0033] (c) Put the carrier precursor II in the muffle furnace, in an air atmosphere of 400 o C under the condition of roasting 3hr to obtain carrier III;

[0034] (2) Catalyst preparation

[0035] (a) Take H 2 PdCl 4 and HAuCl 4 800 ml of the aqueous solution is the impregnating solution B (palladium content: 2.75 g / L, gold content: 0.625 g / L), impregnating 1000 ml of carrier III for 3 hr to obtain the catalyst precursor I;

[0036] (b) 27.5g Na 2 SiO 3 9H 2 O was made into 100 ml...

Embodiment 2

[0054] (1) Carrier SiO 2 pre-processing

[0055] (a) Take (NH 4 ) 3 SiF 6 800 ml of the aqueous solution is impregnation solution A (F ion concentration: 3.0 g / L), impregnating 1000 ml of spherical silica carrier with a diameter of 5.8 mm (BET specific surface area 175 cm 2 / g, the pore volume is 0.7 cm 3 / g) 3hr to obtain catalyst precursor I;

[0056] (b) Put the above-mentioned carrier precursor I in a blast drying oven, 105 o Drying under C conditions for 4 hr to obtain carrier precursor II;

[0057] (c) Put the carrier precursor II in the muffle furnace, in an air atmosphere of 400 o Calcination under C conditions for 3 hr to obtain carrier III;

[0058] (2) Catalyst preparation

[0059] (a) Take H 2 PdCl 4 and HAuCl 4 800ml of the aqueous solution is the impregnating solution B (palladium content: 2.75 g / L, gold content: 0.625 g / L), impregnating 1000ml carrier III for 3 hr to obtain the catalyst precursor I;

[0060] (b) 27.5g Na 2 SiO 3 9H 2 O was made i...

Embodiment 3

[0077] (1) Carrier SiO 2 pre-processing

[0078] (a) Take 800 ml of NaF-containing aqueous solution as impregnation solution A (F ion concentration: 3.0 g / L), and impregnate 1000 ml of spherical silica support with a diameter of 5.8 mm (BET specific surface 175 cm 2 / g, the pore volume is 0.7 cm 3 / g) 3hr to obtain catalyst precursor I;

[0079] (b) Put the above-mentioned carrier precursor I in a blast drying oven, 105 o Drying under C conditions for 4 hr to obtain carrier precursor II;

[0080] (c) Put the carrier precursor II in the muffle furnace, in an air atmosphere of 400 o Calcination under C conditions for 3 hr to obtain carrier III;

[0081] (2) Catalyst preparation

[0082] (a) Take H 2 PdCl 4 and HAuCl 4 800ml of the aqueous solution is the impregnating solution B (palladium content: 2.75 g / L, gold content: 0.625 g / L), impregnating 1000ml carrier III for 3 hr to obtain the catalyst precursor I;

[0083] (b) 27.5g Na 2 SiO 3 9H 2 O was made into 100 ml ...

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Abstract

The invention relates to a catalyst for synthesizing vinyl acetate through an ethylene method and a preparation method of the catalyst, mainly aiming at solving problem that a catalyst in the prior art is low in space time yield and selectivity. The catalyst comprises active ingredients, an auxiliary catalyst and a carrier, wherein the active ingredients include Pd, Au and an alloy thereof, the auxiliary catalyst is potassium acetate, the content of Pd in the catalyst is 1.0-12g / L, the content of Au is 0.1-9.0g / L, and the content of the auxiliary catalyst is 10-50g / l. The catalyst is characterized in that the carrier of the catalyst is SiO2 modified by a fluorinated compound. The problem is well solved through the catalyst, and the catalyst can be applied to industrial production of vinyl acetate synthesis through the ethylene method.

Description

technical field [0001] The invention relates to a vinyl acetate catalyst for ethylene gas phase method, a preparation method of the catalyst, and a synthesis method of vinyl acetate. Background technique [0002] Vinyl acetate, referred to as vinyl acetate (VAM), is one of the organic chemical raw materials with the largest output in the world, and is widely used in the production of polyvinyl acetate, polyvinyl alcohol, coatings, pastes, adhesives, vinylon, films, vinyl A series of chemical products such as copolymer resin and acetal resin, and their application fields are still expanding. [0003] A well-known industrial method for preparing vinyl acetate refers to the realization of ethylene, acetic acid and oxygen in the presence of a supported Pd catalyst through a gas phase reaction. [0004] A kind of preferred vinyl acetate catalyst is on its carrier material such as SiO 2 、Al 2 o 3 A certain amount of Pd metal and Au metal is supported on the surface of its comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/04C07C69/15C07C67/055
Inventor 邱鹏远杨运信张丽斌
Owner CHINA PETROLEUM & CHEM CORP
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