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
View PDF5 Cites 15 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap