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Catalyst taking nitrogen-doped carbon material as carrier and preparation method of catalyst

A nitrogen-doped carbon and catalyst technology, applied in the direction of catalyst carrier, chemical instrument and method, hydrogen halide addition preparation, etc., can solve the problem of large distance between catalysts, achieve high stability, reduce the impact of mass transfer, The effect of promoting activation

Inactive Publication Date: 2020-09-29
朱丽英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it can be seen that the activity or stability of this type of catalyst still has a large distance from industrial applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Nitrogen-doped activated carbon supported on 0.36 wt% Au and 14.7 wt% N-butylpyridine chloride catalyst. Weigh 10g of granular activated carbon, soak it with 200ml of deionized water at room temperature for 12 hours, then filter and wash it, and repeat this 3 times. Then place the activated carbon in the oven, 120 oC Let dry for 12 hours. at 650 o C Under oxygen-free conditions, 150ml / min of ammonia gas and 50ml / min of nitrogen gas were introduced for 5 hours, then the ammonia gas was turned off, and then gradually lowered to room temperature. At this time, the nitrogen doping amount in the bulk phase of activated carbon was 2.30%. Weigh 1.47g of N-butylpyridine chloride, and add 0.072g of chloroauric acid (HAuCl 4 ·3H 2 O), at a temperature of 130 o Mix evenly under C, and form the ionic liquid mixed solution after fully dissolving for 30 minutes. At room temperature, 10 g of nitrogen-doped activated carbon was added to the ionic liquid mixed solution, stirred fo...

Embodiment 2

[0035]Nitrogen-doped mesoporous carbon supported catalyst with 8.59 wt% Cu, 0.75 wt% Bi and 22.8 wt% N-hexylpyridine chloride. Weigh 10 g of granular mesoporous carbon, soak in 200 ml of deionized water at room temperature for 12 hours, then filter and wash, and repeat this 3 times. Then place the activated carbon in the oven, 120 oC Let dry for 12 hours. at 650 o C Under oxygen-free conditions, after passing through 100ml / min of ethylamine vapor and 50ml / min of nitrogen for 5 hours, turn off the ethylamine, and then gradually drop to room temperature. At this time, the nitrogen doping amount in the mesoporous carbon phase is 3.70 %. Weigh 2.28g of N-hexylpyridine chloride, and add 0.1201g of bismuth chloride (BiCl 3 ) and 2.3044g copper chloride (CuCl 2 2H 2 O), at a temperature of 120 o Mix evenly under C, and form the ionic liquid mixed solution after fully dissolving for 30 minutes. At room temperature, 10 g of nitrogen-doped mesoporous carbon was added to the ioni...

Embodiment 3

[0038] Nitrogen-doped activated carbon supported on 0.35 wt% Au and 15.0 wt% N-octylpyridine chloride catalyst. Weigh 10g of granular activated carbon, soak it with 200ml of deionized water at room temperature for 12 hours, then filter and wash it, and repeat this 3 times. Then place the activated carbon in the oven, 120 oC Let dry for 12 hours. at 650 o C Under anaerobic conditions, after passing through 110ml / min of nitrogen monoxide and 50ml / min of nitrogen for 6 hours, turn off the nitrogen monoxide, and then gradually lower to room temperature. At this time, the nitrogen doping amount in the bulk phase of activated carbon is 2.50%. . Weigh 1.5g of N-octylpyridine chloride, and add 0.035g of chloroauric acid (HAuCl 4 ·3H 2 O), at a temperature of 110 o Mix evenly under C, and form the ionic liquid mixed solution after fully dissolving for 30 minutes. At room temperature, 10 g of nitrogen-doped activated carbon was added to the ionic liquid mixed solution, stirred fo...

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PUM

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Abstract

The invention relates to a catalyst taking a nitrogen-doped carbon material as a carrier and a preparation method of the catalyst, and the components of the catalyst comprise a nitrogen-doped carbon-based carrier, an ionic liquid and a non-mercury metal catalyst, and the invention relates to the method for preparing vinyl chloride by acetylene hydrochlorination. According to the catalyst, the carbon-based carrier is subjected to nitrogen doping modification, so that the stability of the loaded ionic liquid is improved, and the loss of the ionic liquid is reduced. Due to the mutual synergisticeffect of the carrier and the ionic liquid, the mercury-free metal catalyst is uniformly dispersed in the ionic liquid on the surface of the catalyst, the influence of mass transfer of a reaction substrate is reduced, and the catalyst is higher in catalytic activity and better in stability.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a catalyst with a nitrogen-doped carbon material as a carrier, a preparation method thereof and the application of the catalyst to acetylene hydrochlorination to prepare vinyl chloride monomer. Background technique [0002] Polyvinyl chloride is the most widely produced plastic product in the world. Due to the excellent characteristics of polyvinyl chloride, it is widely used in various industries. In China, due to its unique energy structure, the production of vinyl chloride monomer is mostly through the calcium carbide method of acetylene hydrochlorination. In the hydrochlorination of acetylene, mercuric chloride supported on activated carbon is used as a catalyst to catalyze the addition reaction of acetylene and hydrogen chloride. However, mercury chloride has the disadvantages of being highly toxic and volatile, endangering human health and polluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J32/00C07C17/08C07C21/06
CPCB01J27/24C07C17/08C07C21/06
Inventor 朱丽英
Owner 朱丽英
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