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Mercury-free catalyst for hydrochlorination synthesis of vinyl chloride, and preparation method of mercury-free catalyst

A mercury catalyst, vinyl chloride technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of difficult industrial production, high preparation and production costs, and low activity, and achieve enhanced stability. properties, increase catalyst activity, and overcome the effect of high activity

Inactive Publication Date: 2017-07-14
WUHAN INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Precious metal catalysts can achieve the activity and life of mercury catalysts, but the preparation and production costs are high, making it difficult to put into industrial production; the cost of base metal mercury-free catalysts is relatively low, but the activity is mostly too low to meet actual needs; a large number of experiments show that many Component composite mercury-free catalyst has high activity, good stability and relatively long service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Soak the carbon nanotubes with 1mol / L phosphoric acid solution at room temperature for 15 hours, and dry them at 120°C for 8 hours after suction filtration to obtain the pretreated carbon nanotube carrier; mix 0.05g of palladium chloride, 2g of Dissolve cuprous metal and 0.5g barium chloride in 3mol / L hydrochloric acid; impregnate equal volumes of the load solution into 50g pretreated carbon nanotube carrier, disperse the active components in 300W ultrasonic wave for 30min, and incubate at 75℃ Rotate in a water bath for 6 hours, and dry at 120° C. to obtain the desired catalyst. The drying time is 12 hours. Using this catalyst to catalyze the hydrochlorination of acetylene to synthesize vinyl chloride, the reaction temperature is 150°C and the space velocity is 30h -1 , the acetylene conversion rate is 99.1%, and the ethylene selectivity is 99.5%.

Embodiment 2

[0020] Soak the carbon nanotubes with 2mol / L phosphoric acid solution at room temperature for 12 hours, and dry them at 120°C for 8 hours after suction filtration to obtain the pretreated carbon nanotube carrier; mix 0.1g of palladium chloride, 3g of Dissolve cuprous metal and 1g potassium chloride in 4mol / L hydrochloric acid; impregnate equal volumes of the load solution into 50g of pretreated carbon nanotube carrier, disperse the active components in 300W ultrasonic wave for 40min, and incubate at 75°C Spinning in a water bath for 6 hours, drying at 120° C. to obtain the desired catalyst, the drying time is 12 hours. Using this catalyst to catalyze the hydrochlorination of acetylene to synthesize vinyl chloride, the reaction temperature is 150°C and the space velocity is 30h -1 , the acetylene conversion rate is 99.3%, and the ethylene selectivity is 99.6%.

Embodiment 3

[0022] Soak the carbon nanotubes with 2mol / L phosphoric acid solution at room temperature for 10 hours, and dry at 120°C for 8 hours after suction filtration to obtain the pretreated carbon nanotube carrier; mix 0.1g of palladium chloride, 6g of chlorine Dissolve cuprous chloride and 0.5g barium chloride in 3mol / L hydrochloric acid; impregnate the equal volume of load liquid into 50g pretreated carbon nanotube carrier, disperse the active component in 300W ultrasonic wave for 30min, and dissolve it at 75 °C in a water bath for 6 h, and then dried at 120 °C to obtain the desired catalyst, and the drying time was 12 h. Using this catalyst to catalyze the hydrochlorination of acetylene to synthesize vinyl chloride, the reaction temperature is 150°C and the space velocity is 30h -1 , the acetylene conversion rate is 99.4%, and the ethylene selectivity is 99.2%.

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PUM

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Abstract

The invention relates to a preparation technology of a catalyst, in particular to a mercury-free catalyst for hydrochlorination synthesis of vinyl chloride, and a preparation method of the mercury-free catalyst. The catalyst takes a carbon nano tube, pretreated by a phosphoric acid solution of a certain concentration, as a carrier, takes palladium chloride as a main active component, takes cuprous chloride or bismuth trichloride as an auxiliary active component, and takes potassium chloride or barium chloride as an auxiliary agent. The multi-component composite mercury-free catalyst shows high activity and selectivity in the hydrochlorination synthesis of the vinyl chloride, and has high stability. The mercury-free catalyst is environmentally-friendly, simple in production technology and good in stability, can be used for replacing the existing mercury catalyst and is in accordance with the concept of green chemistry, thus having good application prospect.

Description

technical field [0001] The invention relates to a catalyst preparation technology, in particular to a mercury-free catalyst for hydrochlorination to synthesize vinyl chloride and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is one of the most important plastic products in the world with a wide range of applications. At present, there are two main industrial synthesis methods of monomer vinyl chloride of polyvinyl chloride, one is acetylene hydrochlorination, and the other is ethylene oxychlorination. my country is rich in coal resources, and oil is mainly imported, which makes the domestic industrial production method of vinyl chloride mainly acetylene hydrochlorination. The mercury catalyst used in the acetylene hydrochlorination method is highly toxic and easily lost, causing great harm to the human body during the production process, high frequency of catalyst replenishment, and high production costs. It is imperative to develop m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J27/186
CPCB01J27/1856B01J27/186
Inventor 吴广文熊奇廖先传熊泽邹杨
Owner WUHAN INSTITUTE OF TECHNOLOGY
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