Mercuric chloride low-mercury catalyst and preparation method thereof

A low-mercury catalyst, mercury chloride technology, applied in physical/chemical process catalysts, chemical instruments and methods, preparation of halogenated hydrocarbons, etc., can solve serious problems, high consumption of mercury chloride, pollution, etc., to reduce pressure, The effect of reducing production costs and resource consumption

Inactive Publication Date: 2009-12-09
贵阳白云银星化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Their mercuric chloride content is more than 10.5%, and there are pro

Method used

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  • Mercuric chloride low-mercury catalyst and preparation method thereof
  • Mercuric chloride low-mercury catalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment

[0030] Embodiment The mercuric chloride low-mercury catalyst produced by Guiyang Baiyun Yinxing Chemical Co., Ltd. has the following mass fraction formula:

[0031] Mercury chloride 9.0%,

[0032] Rare earth chloride additive A 10%,

[0033] Alkaline earth metal chloride additive B 20%,

[0034] Auxiliary C 15%,

[0035] The remainder is activated carbon;

[0036] In the formula, the purity of the mercuric chloride is ≥99.5%; the specific surface area of ​​the activated carbon is 800-950m 2 / g, mechanical strength ≥ 95%; CCl 4 Adsorption value ≥ 50%.

[0037] Preparation methods include:

[0038] (1) Soak the gac with a mass fraction of 60% hydrochloric acid solution at 70°C for subsequent use;

[0039] (2) Dissolve mercuric chloride, auxiliary agent A, auxiliary agent B, and auxiliary agent C together at 70°C, and the residual solute after dissolution is ≤0.08%; then soak the standby activated carbon in the solution at a temperature of 70°C, divide into 3 Group immers...

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Abstract

The invention provides a mercuric chloride low-mercury catalyst and a preparation method thereof. The catalyst adopts active carbon as a carrier to adsorb mercuric chloride, and the formula of the catalyst comprises 8.0 to 10.0 percent of mercuric chloride, 8 to 13 percent of rare earth chloride assistant A, 5 to 25 percent of alkaline earth metal chloride assistant B, 10 to 20 percent of assistant C, and the balance of active carbon. The preparation method comprises the following steps: firstly, soaking the active carbon in hydrochloric acid solution at low temperature for standby; simultaneously dissolving the mercuric chloride, the assistant A, the assistant B and the assistant C together, and soaking the active carton in the solution; performing low-temperature pre-drying on an intermediate product; continuously drying the catalyst; and finally pumping a product at vacuum into a storage silo, packaging and leaving factory. The catalyst can reduce resource consumption and the pressure of treating mercury pollution; simultaneously the production cost is reduced, the poisoning resistance, reduction resistance and loss resistance are greatly improved, the catalytic performance of the catalyst is fully guaranteed, the using time can be prolonged and the using consumption can be reduced; and the catalyst is suitable for polyvinyl chloride manufacturers.

Description

technical field [0001] The present invention relates to catalysts containing halides, in particular to mercuric chloride catalysts, and also to methods for their preparation. Background technique [0002] Mercury chloride is well known as a catalyst for the synthesis of vinyl chloride. In the existing mercuric chloride catalyst, the content of mercuric chloride is usually 10.5% to 12.5%. When it is used to synthesize vinyl chloride, the recovered waste catalyst contains about 3% mercuric chloride, which shows that the catalytic process consumes more than 7.5%. If calculated according to the 10.5% mercuric chloride content in the original model, 75 kg of mercuric chloride will be consumed for every 1 ton of mercuric chloride catalyst used. If the production capacity of calcium carbide polyvinyl chloride in my country is 10Mt, 10kt of mercuric chloride catalyst is needed every year, and 750t of mercuric chloride is consumed. [0003] After searching, there are not many Chin...

Claims

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Application Information

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IPC IPC(8): B01J27/10C07C21/06C07C17/10
Inventor 王良栋
Owner 贵阳白云银星化工有限公司
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