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Vinyl acetate catalyst as well as preparation method and application thereof

A vinyl acetate, catalyst technology, applied in catalyst activation/preparation, carboxylate preparation, chemical instruments and methods, etc., can solve the problem of high residual methyl acetate and ethyl acetate, reduce methyl acetate and ethyl acetate, etc. question

Pending Publication Date: 2022-02-22
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 in the present invention is the relatively high residual amount of methyl acetate and ethyl acetate in the ethylene-method vinyl acetate process product in the prior art, and a kind of ethylene-method vinyl acetate catalyst is provided, which reduces the amount of vinyl acetate product The content of methyl acetate and ethyl acetate in

Method used

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  • Vinyl acetate catalyst as well as preparation method and application thereof
  • Vinyl acetate catalyst as well as preparation method and application thereof
  • Vinyl acetate catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] 1. Catalyst preparation

[0071] (1) Get 120ml of aqueous solution containing chloropalladic acid, wherein the content of palladium in the solution is 2.75g / L, and the added volume is 110ml and the diameter is 5mm (the specific surface is 180m 2 / g, the pore volume is 0.8cm 3 / g) spherical silica carrier to obtain catalyst precursor I;

[0072] (2) Reducing the catalyst precursor I in a hydrogen atmosphere, the hydrogen flow rate is 0.2ml / min, the pressure is 0.5MPa, the reduction temperature is 150°C, and the reduction time is 2h, to obtain the catalyst precursor II;

[0073] (3) Get 110ml of the above-mentioned catalyst precursor II, add 120ml of aqueous solution containing chloroplatinic acid and chloroauric acid, wherein the content of platinum in the solution is 5.04g / L, and the content of gold is 0.60g / L, and dry to obtain the catalyst precursor III;

[0074] (4) Reducing the catalyst precursor III in a hydrogen atmosphere, the hydrogen flow rate is 0.2ml / min, ...

Embodiment 2

[0092] 1. Catalyst preparation

[0093] (1) get the aqueous solution 120ml that contains chloropalladic acid and chloroauric acid, wherein the content of palladium in the solution is 2.75g / L, and the content of gold is 0.60g / L, and adding volume is that 110ml diameter is 5mm (specific surface is 180m 2 / g, the pore volume is 0.8cm 3 / g) spherical silica carrier to obtain catalyst precursor I;

[0094] (2) Reducing the catalyst precursor I in a hydrogen atmosphere, the hydrogen flow rate is 0.2ml / min, the pressure is 0.5MPa, the reduction temperature is 150°C, and the reduction time is 2h, to obtain the catalyst precursor II;

[0095] (3) Get 110ml of the above-mentioned catalyst precursor II, add 120ml of aqueous solution containing chloroplatinic acid, wherein the content of platinum in the solution is 5.04g / L, and dry to obtain catalyst precursor III;

[0096] (4) Reducing the catalyst precursor III in a hydrogen atmosphere, the hydrogen flow rate is 0.2ml / min, the pressur...

Embodiment 3

[0106] 1. Catalyst preparation

[0107] (1) Get 120ml of aqueous solution containing chloropalladic acid, wherein the content of palladium in the solution is 2.75g / L, and the added volume is 110ml and the diameter is 5mm (the specific surface is 180m 2 / g, the pore volume is 0.8cm 3 / g) spherical Al 2 o 3 Carrier, obtains catalyst precursor I;

[0108] (2) Reducing the catalyst precursor I in a hydrogen atmosphere, the hydrogen flow rate is 0.2ml / min, the pressure is 0.5MPa, the reduction temperature is 150°C, and the reduction time is 2h, to obtain the catalyst precursor II;

[0109] (3) Get 110ml of the above-mentioned catalyst precursor II, add 120ml of aqueous solution containing chloroplatinic acid and chloroauric acid, wherein the content of platinum in the solution is 5.04g / L, the content of gold is 0.60g / L, and dry to obtain the catalyst precursor III;

[0110] (4) Reducing the catalyst precursor III in a hydrogen atmosphere, the hydrogen flow rate is 0.2ml / min, t...

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Abstract

In order to solve the technical problem of high residual quantity of methyl acetate and acetic ether in a product of an ethylene-method vinyl acetate production process in the prior art, the invention provides a vinyl acetate catalyst as well as a preparation method and application thereof. According to a technical scheme in the invention, the vinyl acetate catalyst comprises a carrier, main catalyst metal, cocatalyst metal and alkali metal acetate, wherein the main catalyst metal comprises metal palladium and metal platinum, the cocatalyst comprises at least one selected from a substance group consisting of Au and Cu, platinum double-main-peak distribution exists between 68 eV and 78 eV in a 4f electron XPS binding energy spectrum of platinum, binding energy corresponding to the peak value of a low-binding-energy main peak in the platinum double-main-peak is 70.55 eV to 70.80 eV, and the binding energy corresponding to the peak value of a high-binding-energy main peak is 73.95-74.35 eV. Thus, the above technical problem is well solved, and the catalyst can be used in the production of vinyl acetate.

Description

technical field [0001] The invention relates to a vinyl acetate catalyst, its preparation method and application, in particular to a vinyl acetate catalyst used in ethylene acetyl oxidation, its preparation method and application. Background technique [0002] Vinyl acetate is an important chemical raw material, mainly used in the manufacture of polyvinyl alcohol, vinyl copolymer resin, adhesives, coatings, textile processing, paper coating, etc. The production process routes of vinyl acetate mainly include ethylene method and acetylene method. Among them, the ethylene method occupies a dominant position due to its good manufacturability and economy. The vinyl acetate production capacity using the ethylene method accounts for 82% of the global total production capacity. At present, the development trend of the ethylene process route mainly has the following directions: (1) The scale of production equipment tends to be larger. The capacity expansion of the VAC unit is mainly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/04B01J31/26B01J35/10B01J37/02B01J37/18C07C67/04C07C69/14
CPCB01J31/04B01J31/26B01J37/0203B01J37/18C07C67/04B01J35/613B01J35/638B01J35/635B01J35/633B01J35/615C07C69/14
Inventor 刘军晓杨运信
Owner CHINA PETROLEUM & CHEM CORP