Supported type mercury-free catalyst for chloroethylene production with acetylene hydrochlorination method

A technology of acetylene hydrochlorination and mercury catalyst, applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problems such as mercury pollution of calcium carbide method PVC, To achieve the effects of prolonging catalyst life, high activity and reducing cost

Active Publication Date: 2015-07-29
XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In order to solve the problem of mercury pollution that has plagued the calcium carbide process PVC industry for a long time, the technical solution of the present invention is proposed

Method used

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  • Supported type mercury-free catalyst for chloroethylene production with acetylene hydrochlorination method
  • Supported type mercury-free catalyst for chloroethylene production with acetylene hydrochlorination method
  • Supported type mercury-free catalyst for chloroethylene production with acetylene hydrochlorination method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Weigh 0.35g of 2,4-dichloro-6-methoxy-1,3,5-triazine, dissolve it in 9ml of water, heat and stir to dissolve, add 7g of corresponding basic activated carbon carrier, stir, impregnate overnight, and dry to obtain For the treated carrier, weigh 0.0073g of chloroauric acid and 0.21g of copper chloride and dissolve them in 8.5ml of distilled water, stir to dissolve, add the treated carrier into the solution, stir, soak overnight, and place in an oven at 120°C Dry 8h. A highly active metal complex catalyst is obtained.

[0048] Evaluation conditions, put 1g of catalyst into a tubular fixed-bed reactor, dry with nitrogen for 40min at a reaction temperature of 180°C, activate with hydrogen chloride for 40min, and have an acetylene space velocity of 200h -1 , Raw gas volume flow ratio C 2 h 2 : HCl=1:1.1, reaction 12h.

[0049] The relationship between catalyst conversion rate and time change is as follows: figure 1 Shown, the selectivity is shown in Table 1.

Embodiment 2

[0051] Weigh 0.35g of 2-chloro-4,6-diamino-1,3,5-triazine, dissolve it in 9ml of water, heat and stir to dissolve, add 7g of the corresponding basic activated carbon carrier, stir, impregnate overnight, and dry to obtain the treated For the carrier, weigh 0.0073g of chloroauric acid and 0.21g of copper chloride and dissolve them in 8.5ml of distilled water, stir to dissolve, add the treated carrier into the solution, stir, soak overnight, put in an oven and dry at 120°C for 8h . A highly active metal complex catalyst is obtained.

[0052] Evaluation conditions are the same as in Example 1.

[0053] The relationship between catalyst conversion rate and time change is as follows: figure 1 Shown, the selectivity is shown in Table 1.

Embodiment 3

[0055] Weigh 0.35g of 6-chloro-N,N-diethyl-1,3,5-triazine-2,4-diamine, dissolve in 9ml of water, heat and stir to dissolve, add 7g of corresponding basic activated carbon carrier, stir , impregnated overnight, dried to obtain the treated carrier, weighed 0.0073g chloroauric acid and 0.21g cupric chloride and dissolved in 8.5ml distilled water, stirred and dissolved, added the treated carrier into the solution, stirred, soaked overnight, put in Dry in an oven at 120°C for 8h. A highly active metal complex catalyst is obtained.

[0056] Evaluation conditions are the same as in Example 1.

[0057] The relationship between catalyst conversion rate and time change is as follows: figure 1 Shown, the selectivity is shown in Table 1.

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Abstract

The invention discloses a supported type mercury-free catalyst for chloroethylene production with an acetylene hydrochlorination method. According to the catalyst, activated carbon is taken as a basic carrier, and the carrier is pre-treated with a high-stability triazine organic compound adopting a rigid plane structure, so that the surface and the pore surface of the carrier are covered with a layer of rigid plane substances, powdering of the carrier in the preparation and use processes is reduced, then a main active component of gold and an auxiliary active component are supported on the pre-treated carrier, and a stable metal coordination compound is formed. Reduction of activated carbon to the active component of gold is reduced, and the dispersity of the active component on the pre-treated carrier is improved. In a reaction for preparing chloroethylene, the stability of the catalyst of the carrier pre-treated with the triazine coordination compound is obviously better than that of an untreated carrier catalyst, besides, when the content of gold is smaller than 0.05%, the stability is still very high, and the mercury-free catalyst is low in cost, high in activity and good in stability.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a supported mercury-free catalyst used in the production of vinyl chloride by acetylene hydrochlorination. Background technique [0002] Polyvinyl chloride (PVC) is one of the five major thermoplastic synthetic resins, and China is the largest producer of PVC in the world. Mainly used in industry, agriculture, daily life and other industries, it is closely related to our life. [0003] At present, there are two main processes for the production of industrial vinyl chloride, one is the calcium carbide acetylene process with calcium carbide, coal and crude salt as the main raw materials; the other is the ethylene process with petroleum as the main raw material. The production of PVC in the international market is mainly based on the ethylene method. However, due to the resource constraints of rich coal, poor oil and little gas in China, the calcium carbide method is the most wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C07C17/08C07C21/06
Inventor 班丽丽罗国华周军陈万银司江坤李春华李国栋徐浩
Owner XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD
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