Catalyst for preparing vinyl chloride by cracking 1,2-dichloroethane as well as preparation method and application of catalyst

A dichloroethane and catalyst technology, applied in the direction of dehydrohalogenation preparation, etc., can solve the problems of low conversion rate and unstable performance, and achieve the effects of good catalytic performance, simple preparation process, and cheap and easy-to-obtain raw materials

Inactive Publication Date: 2016-08-10
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims at the problems existing in the above-mentioned prior art, and provides a catalyst for the preparation o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Prepare sample 1

[0033] 1. Dissolve 20g of urea in 100ml of water to make a solution.

[0034] 2. Add 100g of activated carbon to the above solution and soak under normal pressure, so that the solution can fully penetrate into the interior of the activated carbon. The soaking temperature is 30° C., and the soaking time is 3 hours.

[0035] 3. Dry the soaked activated carbon and its load at 120°C to fully volatilize the solvent.

[0036] 4. Roast the dried activated carbon in a tube furnace at high temperature under the protection of nitrogen at a temperature of 550°C and a heating rate of 5°C / min, and cool to room temperature.

[0037] The sample 1 prepared by the above steps has a mass percentage of nitrogen-containing compounds of 16.7%.

Embodiment 2

[0039] Prepare sample 2

[0040] 1. Dissolve 40g of urea in 100ml of water to make a solution.

[0041] 2. Add 100g of activated carbon into the above solution for soaking, and soak under normal pressure so that the solution can fully penetrate into the activated carbon. The soaking temperature is 30° C., and the soaking time is 4 hours.

[0042] 3. Dry the soaked activated carbon and its load at 120°C to fully volatilize the solvent.

[0043] 4. Roast the dried activated carbon in a tube furnace at high temperature under the protection of nitrogen at a temperature of 550°C and a heating rate of 5°C / min, and cool to room temperature.

[0044] The mass percentage of nitrogen-containing compound in sample 2 prepared in the above steps is 28.6%.

Embodiment 3

[0046] Prepare sample 3

[0047] 1. Dissolve 50g of urea in 100ml of water to make a solution.

[0048] 2. Add 100g of activated carbon to the above solution and soak under normal pressure, so that the solution can fully penetrate into the interior of the activated carbon. The soaking temperature is 30° C., and the soaking time is 3 hours. .

[0049] 3. Dry the soaked activated carbon and its load at 120°C to fully volatilize the solvent.

[0050] 4. Roast the dried activated carbon in a tube furnace at high temperature under the protection of nitrogen at a temperature of 550°C and a heating rate of 5°C / min, and cool to room temperature.

[0051] The mass percentage of nitrogen-containing compound in sample 3 prepared by the above steps is 33.3%.

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Abstract

The invention relates to a catalyst for cracking 1,2-dichloroethane to prepare vinyl chloride and its preparation method and application. The catalyst uses activated carbon as a carrier and supports nitrogen-containing compounds. The catalyst is based on the total mass of the catalyst. The mass percentage of nitrogen-containing compounds is 16.7% to 44.4%. The catalyst prepared by the preparation method provided by the invention has better catalytic performance, can reduce the temperature for preparing vinyl chloride from 450-500°C in the current industrial pyrolysis to 280-300°C, and increase the single-pass conversion rate of dichloroethane from 50%. The selectivity of vinyl chloride can reach 93%, and the selectivity of vinyl chloride can also reach 99.3%, and has a long service life of nearly 100 hours, and the catalyst raw materials are cheap and easy to obtain, and the preparation process is simple. The catalyst is not only suitable for the cracking of dichloroethane, but also suitable for the reforming of acetylene dichloroethane to prepare vinyl chloride.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst for cracking 1,2-dichloroethane to prepare vinyl chloride and a preparation method thereof, belonging to the field of catalyst preparation technology and application range. Background technique [0002] Polyvinyl chloride is a kind of thermoplastic resin. Due to its excellent performance, it is widely used in various industries of production and life, and occupies a very important position in the development of the national economy and people's daily life. It is obtained by the polymerization of vinyl chloride monomer. At present, the industrial production methods of vinyl chloride mainly include ethylene method and acetylene method. Due to the cost of raw materials and environmental protection, ethylene oxychlorination is currently the most widely used method for producing vinyl chloride in the world. The method uses ferric chloride as a catalyst, ethylene and chlorine react in gas phas...

Claims

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Application Information

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IPC IPC(8): B01J27/24C07C17/25C07C21/06
CPCB01J27/24C07C17/25
Inventor 宋丽娟孙玺秦玉才孙兆林姜恒张晓彤
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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