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A kind of non-mercury catalyst for preparing vinyl chloride and its preparation method and application

A non-mercury catalyst, vinyl chloride technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve environmental pollution, mercury resource exhaustion, poor wear resistance And other issues

Active Publication Date: 2016-03-02
DALIAN RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, activated carbon loaded with mercuric chloride is still used as a catalyst in the industry. This catalyst has three major disadvantages: first, the activated carbon has low strength, poor wear resistance, and is easy to pulverize, and the catalyst cannot be regenerated after deactivation; secondly, mercuric chloride is a It is a highly toxic substance that is easily sublimated and lost, and enters the environment, causing ecological deterioration and environmental pollution; finally, my country's mercury resources have been basically exhausted, and catalysts rely on imported raw material mercury to maintain production
[0011] The currently reported gold-containing non-mercury catalysts have not seen industrial applications. On the one hand, the cost of the catalyst is relatively high; on the other hand, the activity and stability of the catalyst need to be further improved and improved.

Method used

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  • A kind of non-mercury catalyst for preparing vinyl chloride and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 1.7279g of SnCl 2 2H 2 O and 0.3960 g of TiCl 4 Dissolve in 40mL of absolute ethanol, make a solution, reflux and stir at 78°C for 3h in a reflux stirring device, and then stand and age in a 30°C constant temperature water bath for 8h to obtain a composite metal oxide sol, which is divided into two times to obtain The composite metal oxide sol sprayed onto 20g of coconut shell activated carbon, and then after drying at 80°C for 12h and roasting at 300°C for 4h, the activated carbon carrier modified by composite metal oxide was obtained;

[0027] Take 1.2 mL of 16.7 mg / mL HAuCl 4 4H 2 O aqueous solution was added to 40 mL of deionized water, sprayed onto the composite metal oxide-modified activated carbon support twice, dried at 80 °C for 12 h, and calcined at 200 °C for 4 h to obtain a non-mercury catalyst.

Embodiment 2

[0029] Weigh 1.5359g of SnCl 2 2H 2 O and 0.7920 g of TiCl 4 Dissolve in 40mL of absolute ethanol, make a solution, reflux and stir at 78°C for 3h in a reflux stirring device, and then stand and age in a 30°C constant temperature water bath for 8h to obtain a composite metal oxide sol, which is divided into two times to obtain The composite metal oxide sol sprayed onto 20g of coconut shell activated carbon, and then after drying at 80°C for 12h and roasting at 300°C for 4h, the activated carbon carrier modified by composite metal oxide was obtained;

[0030] Take 1.2 mL of 16.7 mg / mL HAuCl 4 4H 2 O aqueous solution was added to 40 mL of deionized water, sprayed onto the composite metal oxide-modified activated carbon support twice, dried at 80 °C for 12 h, and calcined at 200 °C for 4 h to obtain a non-mercury catalyst.

Embodiment 3

[0032] Weigh 1.3439g of SnCl 2 2H 2 O and 1.1880 g of TiCl 4 Dissolve in 40mL of absolute ethanol, make a solution, reflux and stir at 78°C for 3h in a reflux stirring device, and then stand and age in a 30°C constant temperature water bath for 8h to obtain a composite metal oxide sol, which is divided into two times to obtain The composite metal oxide sol sprayed onto 20g of coconut shell activated carbon, and then after drying at 80°C for 12h and roasting at 300°C for 4h, the activated carbon carrier modified by composite metal oxide was obtained;

[0033] Take 1.2 mL of 16.7 mg / mL HAuCl 4 4H 2 O aqueous solution was added to 40 mL of deionized water, sprayed onto the composite metal oxide-modified activated carbon support twice, dried at 80 °C for 12 h, and calcined at 200 °C for 4 h to obtain a non-mercury catalyst.

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Abstract

The invention discloses a non-mercury catalyst for preparing vinyl chloride, a preparation method and application thereof. The non-mercury catalyst of the present invention comprises activated carbon carrier, procatalyst Au, composite metal oxide cocatalyst, wherein, composite metal oxide cocatalyst is a kind of semiconductor composite oxide with crystalline form, and its structure is represented by following formula: M1 -xNxOy, M is selected from one of Sn, Ni and Zn, and N is selected from one of Ti, Sb and Ga. The non-mercury catalyst of the invention modifies the active carbon carrier, so the catalyst has high activity and good selectivity.

Description

technical field [0001] The invention relates to a non-mercury catalyst for preparing vinyl chloride, a preparation method and application thereof. Background technique [0002] In the production of vinyl chloride in my country, the proportion of vinyl chloride monomer produced by calcium carbide acetylene process is as high as 70%. At present, activated carbon loaded with mercuric chloride is still used as a catalyst in the industry. This catalyst has three major disadvantages: first, the activated carbon has low strength, poor wear resistance, and is easy to pulverize, and the catalyst cannot be regenerated after deactivation; secondly, mercuric chloride is a A highly toxic substance, which is easily sublimated and lost, enters the environment, causing ecological deterioration and environmental pollution; finally, my country's mercury resources have been basically exhausted, and catalysts rely on imported raw material mercury to maintain production. [0003] In order to rep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/66B01J23/68B01J23/89C07C21/06C07C17/08
Inventor 孟纪文邵玉昌林春迎
Owner DALIAN RES & DESIGN INST OF CHEM IND