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Catalyst without mercury for hydrochlorination of acetylene as well as preparation method and use thereof

A technology of acetylene hydrochlorination and mercury catalyst, applied in the direction of physical/chemical process catalysts, hydrogen halide addition preparation, chemical instruments and methods, etc., can solve the problems of highly toxic catalysts, achieve high utilization efficiency and increase production efficiency , the effect of cost reduction

Inactive Publication Date: 2009-08-05
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problem of highly toxic catalysts in the process of producing vinyl chloride from acetylene

Method used

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  • Catalyst without mercury for hydrochlorination of acetylene as well as preparation method and use thereof
  • Catalyst without mercury for hydrochlorination of acetylene as well as preparation method and use thereof
  • Catalyst without mercury for hydrochlorination of acetylene as well as preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Dissolve 0.01g of bismuth chloride and 0.04g of palladium chloride in 10g of 0.1% hydrochloric acid and 0.2% phosphoric acid aqueous solution, and stir evenly until all the solids are dissolved. The specific surface area of ​​6g is 350-400m 2 / g, 100-200 mesh SiO 2 Add it into the prepared solution, let it stand for 5 hours, dry it at 120°C for 5 hours, and then bake it at 450°C for 8 hours.

Embodiment 2

[0062] Dissolve 0.3g of bismuth chloride, 0.05g of manganese chloride and 0.2g of cesium chloride in 10g of 3% hydrochloric acid and 6% phosphoric acid aqueous solution, and stir evenly until all the solids are dissolved. The specific surface area of ​​6g is 350-400m 2 / g, 100-200 mesh SiO 2 Add it into the prepared solution, let it stand for 5 hours, dry it at 120°C for 5 hours, and then bake it at 400°C for 8 hours.

Embodiment 3

[0064] Dissolve 0.3g of bismuth phosphate, 0.2g of chromium chloride hexahydrate, and 0.1g of potassium chloride in 10g of 3% hydrochloric acid and 6% phosphoric acid aqueous solution, and stir evenly until all the solids are dissolved. The specific surface area of ​​7g is 150-200m 2 / g, 100~200 mesh α-Al 2 o 3 Add it into the prepared solution, let it stand for 5 hours, dry it at 120°C for 5 hours, and then bake it at 800°C for 8 hours.

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Abstract

The invention provides a mercury-free catalyst for an acetylene hydrochlorination reaction, a preparation method and application thereof, and relates to a catalyst for preparing chloroethylene by the acetylene hydrochlorination reaction, preparation and regeneration methods, and application thereof. The catalyst contains a bismuth element and a phosphor element, and the balance being an accelerative catalytic metal element and a carrier, wherein the bismuth element exists as oxide of bismuth, inorganic salt of bismuth or organic salt of bismuth; and the phosphor element exists as one or mixture of substances of inorganic acid containing phosphor, inorganic salt of phosphor and oxide containing the phosphor. The preparation method comprises preparation of an impregnating mother solution, addition of a catalyst carrier by incipient impregnation, drying and baking and other process steps. The catalyst prepared by the method has the advantages of good activity, high selectivity, high strength and regeneration capability, and can be used for the acetylene hydrocchlorination reaction for producing polyvinyl chloride by a calcium carbide process. The invention also provides the method for preparing chloroethylene by the catalyst and a regenerating method of the mercury-free catalyst.

Description

technical field [0001] The invention relates to a mercury-free catalyst and its preparation method, in particular to a catalyst for acetylene hydrochlorination and its application, in particular to a catalyst for acetylene hydrochlorination to produce vinyl chloride and its preparation and regeneration methods. The invention belongs to catalyst preparation technology and application scope Background technique [0002] Polyvinyl chloride is one of the most widely used general-purpose plastics in the world due to its excellent performance in many aspects such as physical properties and chemical stability. Polyvinyl chloride is polymerized from vinyl chloride (VCM). The industrial preparation methods of vinyl chloride monomer are mainly acetylene carbide method and ethylene oxychlorination method. The acetylene calcium carbide method is more suitable for production in countries and regions with rich coal resources and shortage of oil resources because the raw material is coal...

Claims

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Application Information

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IPC IPC(8): B01J27/186C07C19/043C07C17/08
CPCY02P20/584
Inventor 魏飞魏小波罗国华骞伟中金涌
Owner TSINGHUA UNIV
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