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Non-mercury catalyst for production of vinyl chloride and preparation method thereof

A non-mercury catalyst and vinyl chloride technology, applied in the direction of hydrogen halide addition preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of large environmental pollution, easy loss of activity, fast reaction speed, etc., to avoid Effects of environmental pollution, reduction of crushing probability, and improvement of carrier quality

Inactive Publication Date: 2011-05-25
YIBIN TIANYUAN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] From the analysis of the actual production situation, the mercuric chloride catalyst has the following disadvantages: (1), mercuric chloride reacts quickly to acetylene to synthesize vinyl chloride, and the reaction is intense, which is difficult to control; (2), mercuric chloride is a highly toxic Substances; greater environmental pollution; (3), easy to lose activity
[0009] Therefore, it is a problem that those skilled in the art are eager to solve but have not been able to solve all the time to find a catalyst for the production of vinyl chloride that is less polluting to the environment, is not easily deactivated, has a long life, and is highly efficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Fully dissolve 8.93g of stannous chloride, 0.098g of barium chloride, 0.105g of zinc chloride and 0.099g of copper chloride in 90ml of pure water, the concentration of stannous chloride is 0.52mol / L, and 50g of pickled Coconut shell activated carbon is dried at 100°C, then calcined at 300°C for 3 hours, and immediately added to the dissolved impregnation solution. Immerse at room temperature for 6 hours with constant stirring. Evaporate water on a water bath at 100°C, then dry at 150°C for 10 hours, take it out, and cool it for later use. In the reaction of hydrogen chloride addition to acetylene to generate vinyl chloride, the molar ratio of reaction gas distribution is C2H2 / HCl=1 / 1.15, and the space velocity is 30h -1 , the reaction is carried out at a reaction temperature of 150°C, the amount of catalyst is 50g, and the activation time of hydrogen chloride is 3 hours. After analyzing the tail gas of the reaction, the conversion rate of acetylene is above 98%, and th...

Embodiment 2

[0034] Fully dissolve 14.28g of stannous chloride, 0.206g of barium chloride, 0.211g of zinc chloride and 0.217g of copper chloride in 90ml of pure water, the concentration of stannous chloride is 0.84mol / L, and 50g of pickled Coconut shell activated carbon is dried at 100°C, then calcined at 300°C for 3 hours, and immediately added to the dissolved impregnation solution. Immerse at room temperature for 6 hours with constant stirring. Evaporate water on a water bath at 100°C, then dry at 150°C for 10 hours, take it out, and cool it for later use. In the reaction of hydrogen chloride addition to acetylene to generate vinyl chloride, the molar ratio of reaction gas distribution is C2H2 / HCl=1 / 1.15, and the space velocity is 30h -1 , the reaction is carried out at a reaction temperature of 150°C, the amount of catalyst is 50g, and the activation time of hydrogen chloride is 3 hours. After analyzing the tail gas of the reaction, the conversion rate of acetylene is above 98%, and t...

Embodiment 3

[0036] Fully dissolve 21.89g of stannous chloride, 0.436g of barium chloride, 0.441g of zinc chloride and 0.432g of copper chloride in 90ml of pure water, the concentration of stannous chloride is 1.28mol / L, and 50g of pickled Coconut shell activated carbon is dried at 100°C, then calcined at 300°C for 3 hours, and immediately added to the dissolved impregnation solution. Immerse at room temperature for 6 hours with constant stirring. Evaporate water on a water bath at 100°C, then dry at 150°C for 10 hours, take it out, and cool it for later use. In the reaction of hydrogen chloride addition to acetylene to generate vinyl chloride, the molar ratio of reaction gas distribution is C2H2 / HCl=1 / 1.15, and the space velocity is 30h -1 , the reaction is carried out under the condition of a reaction temperature of 150°C, the amount of catalyst is 50g, the activation time of hydrogen chloride is 3 hours, the tail gas of the reaction is analyzed, and the conversion rate of acetylene is ...

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Abstract

The invention discloses a non-mercury catalyst for the production of vinyl chloride and a preparation method thereof, belonging to the fields of chemical catalyst and the preparation thereof. The non-mercury catalyst of the invention uses cocoanut active charcoal as carrier and stannous chloride as main active substance, wherein the weight percentage of stannous chloride is 15%-30%; and at least one additive of barium chloride, zinc chloride and copper chloride is added and the total additive weight percentage is 0.5-2%. By using the non-mercury catalyst, the environmental pollution caused by the mercury-containing catalyst can be avoided; the large-scale production can be benefited, the conversion rate and selectivity of the catalyst can be increased, the yield of the product can be increased; by increasing the quality of the carrier, technical guarantee can be provided for the large-scale production device of vinyl chloride, the loss of the active matter can be slowed down, the service life of the catalyst can be prolonged; and the use efficiency of the catalyst can be increased by 500%.

Description

technical field [0001] The invention relates to a catalyst for producing vinyl chloride, in particular to a non-mercury catalyst for producing vinyl chloride. Background technique [0002] In the PVC industry, from the perspective of the current industrial application, there are mainly two kinds of process technologies - calcium carbide acetylene process and ethylene balance process. The vinyl chloride produced by the calcium carbide acetylene production process accounts for 6%-8% of the world's total vinyl chloride production; the rest is mainly produced by the ethylene balance process. [0003] The catalysts for the production of vinyl chloride by the calcium carbide method are mainly divided into two types: mercury catalysts and non-mercury catalysts. Mercury catalysts mainly use activated carbon as the carrier and mercuric chloride as the main active substance; non-mercury catalysts mainly use palladium, platinum and other precious metals as active substances. [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135B01J27/138B01J27/10B01J21/18C07C17/08C07C21/06
Inventor 罗云陈洪孙永贵吴敏雷宇雄
Owner YIBIN TIANYUAN GRP CO LTD
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