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Preparation method of gold-based catalyst for preparing vinyl chloride by acetylene hydrochlorination method

A technology of acetylene hydrochlorination and vinyl chloride, applied in catalyst activation/preparation, organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, etc., to reduce environmental pollution, low price, and improve performance. Effect

Active Publication Date: 2019-04-16
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the formula of catalyst is quite different from this patent
Patent CN201410255462.8 mentions a supported gold trichloride catalyst with modified activated carbon as a carrier, which also involves the use of amino acids, but the catalyst formula and preparation method are quite different from this patent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Dissolve 20g of hydrazine hydrate into 240g of deionized water to obtain an aqueous solution of hydrazine hydrate, impregnate the hydrazine hydrate solution onto 300g of activated carbon carrier by equal volume impregnation method, let stand at 50°C for 24 hours, and dry at 120°C to obtain Pretreated carrier;

[0041] (2) Dissolve 0.567 grams of chloroauric acid in a mixed solvent composed of 12 g of ethanol and 15 g of deionized water to obtain a chloroauric acid solution;

[0042] (3) Dissolve 0.848g of tryptophan in a mixed solvent composed of 8g of ethanol and 5g of deionized water to obtain a tryptophan solution;

[0043] (4) Under the condition of stirring at 10°C, fully mix the chloroauric acid solution and the tryptophan solution evenly, and after stirring for 24 hours, filter and separate the obtained sample, and then dry the filter cake at 50°C to obtain sample A;

[0044] (5) Dissolve 3g of sample A in 140g of ammonium sulfate aqueous solution with a mas...

Embodiment 2

[0046] (1) Dissolve 20g of hydrazine hydrate into 240g of deionized water to obtain an aqueous solution of hydrazine hydrate, impregnate the hydrazine hydrate solution onto 300g of activated carbon carrier by equal volume impregnation method, let stand at 50°C for 24 hours, and dry at 120°C to obtain Pretreated carrier;

[0047] (2) Dissolve 0.567 grams of chloroauric acid in a mixed solvent composed of 12 g of ethanol and 15 g of deionized water to obtain a chloroauric acid solution;

[0048] (3) Dissolve 0.848g of tryptophan in a mixed solvent composed of 8g of ethanol and 5g of deionized water to obtain a tryptophan solution;

[0049] (4) Under the condition of stirring at 10°C, fully mix the chloroauric acid solution and the tryptophan solution evenly, and after stirring for 24 hours, filter and separate the obtained sample, and then dry the filter cake at 50°C to obtain sample A;

[0050] (5) Dissolve 3g of sample A in 140g of ammonium sulfate aqueous solution with a mas...

Embodiment 3

[0052] (1) Dissolve 20g of hydrazine hydrate into 240g of deionized water to obtain an aqueous solution of hydrazine hydrate, impregnate the hydrazine hydrate solution onto 300g of activated carbon carrier by equal volume impregnation method, let stand at 50°C for 24 hours, and dry at 120°C to obtain Pretreated carrier;

[0053] (2) Dissolve 0.567 grams of chloroauric acid in a mixed solvent composed of 12 g of ethanol and 15 g of deionized water to obtain a chloroauric acid solution;

[0054] (3) Dissolve 0.848g of tryptophan in a mixed solvent composed of 8g of ethanol and 5g of deionized water to obtain a tryptophan solution;

[0055] (4) Under the condition of stirring at 10°C, fully mix the chloroauric acid solution and the tryptophan solution evenly, and after stirring for 24 hours, filter and separate the obtained sample, and then dry the filter cake at 50°C to obtain sample A;

[0056] (5) Dissolve 5g of sample A in 140g of ammonium sulfate aqueous solution with a mas...

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Abstract

The invention provides a preparation method of a gold-based catalyst for preparing vinyl chloride by an acetylene hydrochlorination method and the catalyst prepared by the method. According to the catalyst, an activated carbon is used as a carrier, a complex formed by gold and a nitrogen-containing ligand is a main active component, compared with other gold-based catalysts, green solvents such aswater, ethanol and the like are utilized to replace acidic solvents such as hydrochloric acid, aqua regia and the like in the catalyst preparation process, and the gold in a high valence state is stabilized by the complexation of the nitrogen-containing ligand with the gold, thereby improving the effectiveness of the catalyst. The catalyst has high activity and vinyl chloride selectivity in the reaction of fixed bed acetylene hydrochlorination to prepare the vinyl chloride, the preparation method is green and environmentally friendly, and the method has a great industrial application value.

Description

technical field [0001] The present invention proposes a preparation method of a gold-based catalyst used in the preparation of vinyl chloride by acetylene hydrochlorination and the catalyst prepared by using the method. The catalyst uses activated carbon as a carrier, and the complex formed by gold and a nitrogen-containing ligand is mainly used Active components, compared with other gold-based catalysts, green solvents such as water and ethanol are used in the preparation process of the catalyst instead of acidic solvents such as hydrochloric acid, nitric acid and aqua regia, and the complexation of nitrogen-containing ligands with gold stabilizes Gold in a high valence state improves the performance of the catalyst. The catalyst has extremely high activity and vinyl chloride selectivity in the fixed-bed hydrochlorination of acetylene to produce vinyl chloride, and the preparation method is green and environment-friendly, and has great industrial application value. Backgrou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/18B01J31/22B01J37/02C07C17/08C07C21/06
CPCB01J31/1805B01J31/2217B01J37/0207B01J2231/32B01J2531/18C07C17/08C07C21/06
Inventor 李伟王彦琳关庆鑫苗丁文
Owner NANKAI UNIV
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