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Environment-friendly non-mercury catalyst for acetylene-method chloroethylene synthesis and preparation method thereof

A non-mercury catalyst, vinyl chloride technology, applied in hydrogen halide addition preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high mercury content, low catalytic efficiency, environmental pollution, etc. Improve, improve conversion rate and selectivity, use the effect of increasing efficiency

Inactive Publication Date: 2013-11-13
湖北随州双星生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low catalytic efficiency, high mercury content and serious environmental pollution of current mercuric chloride catalysts, and to provide an acetylene synthesis method that has little environmental pollution, is not easy to deactivate, has a long service life and high use efficiency Environment-friendly non-mercury catalyst for vinyl chloride

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve 0.1 g of platinum chloride and 0.2 g of cerium chloride in 10 ml of distilled water. The prepared impregnating solution was added to 12g of coal-based activated carbon carrier, impregnated at room temperature for 8h, and evaporated to dryness in a rotary evaporator at 80°C. Then vacuum-dry at a temperature of 120° C. for 12 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 C 2 h 2 / HCl=1 / 1.15, airspeed 300h -1 , The reaction was carried out under the condition of a reaction temperature of 150°C. The catalyst consumption is 12g, and the hydrogen chloride activation time is 0.5h. Analysis of the reaction tail gas shows that the conversion rate of acetylene is 96-98%, and the selectivity of vinyl chloride is ≥98%.

Embodiment 2

[0026] Dissolve 0.15 g of platinum chloride, 0.2 g of cerium chloride, and 0.25 g of bismuth chloride in 10 ml of distilled water. Add the prepared impregnating solution into 12g of coconut shell activated carbon carrier, impregnate at room temperature for 10h, and evaporate the water to dryness in a rotary evaporator at 90°C. Then vacuum-dry at a temperature of 150° C. for 12 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 C 2 h 2 / HCl=1 / 1.05, airspeed 400h -1 , The reaction was carried out under the condition of a reaction temperature of 150°C. The catalyst consumption is 12g, and the hydrogen chloride activation time is 1h. Analysis of the reaction tail gas shows that the conversion rate of acetylene is 97-99%, and the selectivity of vinyl chloride is ≥99%.

Embodiment 3

[0028] Dissolve 0.15g of gold chloride and 0.5g of bismuth chloride in 10ml of distilled water. Add the prepared impregnating solution into 12 g of husk-based activated carbon carrier, impregnate at room temperature for 10 h, and evaporate the water to dryness in a rotary evaporator at 80°C. Then vacuum-dry at a temperature of 150° C. for 12 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 C 2 h 2 / HCl=1 / 1.1, airspeed 400h -1 , The reaction was carried out under the condition of a reaction temperature of 180°C. The catalyst consumption is 12g, and the hydrogen chloride activation time is 1h. Analysis of the reaction tail gas shows that the conversion rate of acetylene is 96-98%, and the selectivity of vinyl chloride is ≥98%.

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Abstract

The invention discloses an environment-friendly non-mercury catalyst for acetylene-method chloroethylene synthesis and a preparation method thereof. According to the non-mercury catalyst disclosed by the invention, a precious metal chloride, namely any of gold chloride, platinum chloride and palladium chloride, is adopted as a main active substance, wherein the content of the precious metal chloride accounts for 0.5-5% of the weight of the catalyst; an assistant active ingredient is one or more than one of non-precious metal chlorides, namely bismuth chloride, cuprous chloride, cerium chloride and zinc chloride, wherein the content of the non-precious metal chlorides accounts for 1-10% of the weight of the catalyst; and a support is one of coconut shell charcoal, fruit shell charcoal and coal charcoal. The non-mercury catalyst is prepared by a conventional impregnation method. The preparation method of the catalyst is simple and is environmental-friendly, few byproducts are generated, the stability of the prepared catalyst is good, the environmental pollution caused by mercury catalysts is avoided, the service life of the catalyst is prolonged, the acetylene conversion ratio can reach 96-99%, and the selectivity to chloroethylene is not lower than 98%.

Description

technical field [0001] The invention relates to a preparation method of a non-mercury catalyst, in particular to a preparation method of a non-mercury catalyst in the production of vinyl chloride by acetylene hydrochlorination. Background technique [0002] Polyvinyl chloride (PVC) is one of the top five engineering plastics in the world and is widely used in various industries. One of the key technologies for its production is the synthesis of vinyl chloride monomer. At present, there are two major types of vinyl chloride synthesis technologies in the world, namely ethylene oxychlorination and acetylene hydrochlorination. In the 1970s, foreign countries basically completed the conversion of PVC resin production raw material route from calcium carbide acetylene method to ethylene oxychlorination method. Nowadays, the ethylene oxychlorination method has become the main production method of PVC resin in foreign countries, and the output ratio reaches 93%. However, due to the...

Claims

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Application Information

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IPC IPC(8): B01J27/13B01J27/10B01J27/138C07C21/06C07C17/08
Inventor 廖书辉
Owner 湖北随州双星生物科技有限公司
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