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Acetylene-hydrochlorinated novel low-solid mercury catalyst and preparation method thereof

A technology of acetylene hydrochlorination and mercury catalyst, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as unstable catalytic conversion rate, polluted environment, high loss on ignition rate, etc., to achieve Good catalytic conversion effect, increased specific surface area, and strong thermal stability

Active Publication Date: 2015-11-11
贵州重力科技环保股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The applicant has found through research that: In the traditional catalyst production process and method, the single active carbon adsorbed mercuric chloride is used as a catalyst for acetylene hydrochlorination. In the process of use, there are the following disadvantages: ①The service life is short; ②The catalytic conversion rate is not good. Stable; ③Poor thermal stability, high loss on ignition rate
Due to the above reasons, mercury emissions increase, which seriously pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Calculated by weight percentage, the finished catalyst of this implementation contains: 6.5% of mercury chloride, 3.5% of zinc chloride, and 10% of potassium chloride, based on which the relevant solution is prepared. This embodiment includes the following steps:

[0021] Step 1: Activated carbon pretreatment: Treat activated carbon with hydrochloric acid solution, the hydrogen ion concentration in the solution is ≤ 10 -6 mol / L, the temperature is around 80℃;

[0022] Step 2: in the dissolving tank, mercuric chloride, zinc chloride and potassium chloride are prepared into a mixed aqueous solution;

[0023] Step 3: under the condition of 50°C, the mixed aqueous solution prepared in step 2) is used to impregnate the coal-made activated carbon in the spray soaking tank by the method of circulating spray;

[0024] Step 4: Put the activated carbon obtained in step 3) into a drying furnace, and dry the activated carbon at 70°C, 80°C, 90°C, and 100°C for 2 hours by a stepped...

Embodiment 2

[0027] Calculated by weight percentage, the finished catalyst of this embodiment contains: 6% of mercury chloride, 2.5% of zinc chloride, and 7% of potassium chloride, based on which the relevant solution is prepared. This embodiment includes the following steps:

[0028] Step 1: Activated carbon pretreatment: Treat activated carbon with hydrochloric acid solution, the hydrogen ion concentration in the solution is ≤ 10 -6 mol / L, the temperature is around 80℃;

[0029] Step 2: in the dissolving tank, mercuric chloride, zinc chloride and potassium chloride are prepared into a mixed aqueous solution;

[0030] Step 3: under the condition of 50°C, the mixed aqueous solution prepared in step 2) is used to impregnate the coal-made activated carbon in the spray soaking tank by the method of circulating spray;

[0031] Step 4: Put the activated carbon obtained in step 3) into a drying furnace, and dry the activated carbon at 70°C, 80°C, 90°C, and 100°C for 2 hours by a stepped heatin...

Embodiment 3

[0034] Calculated by weight percentage, the finished catalyst of this embodiment contains: 5% of mercury chloride, 1.5% of zinc chloride, and 6% of potassium chloride, based on which the relevant solution is prepared. This embodiment includes the following steps:

[0035] Step 1: Activated carbon pretreatment: Treat activated carbon with hydrochloric acid solution, the hydrogen ion concentration in the solution is ≤ 10 -6 mol / L, the temperature is around 80℃;

[0036] Step 2: in the dissolving tank, mercuric chloride, zinc chloride and potassium chloride are prepared into a mixed aqueous solution;

[0037] Step 3: under the condition of 50°C, the mixed aqueous solution prepared in step 2) is used to impregnate the coal-made activated carbon in the spray soaking tank by the method of circulating spray;

[0038] Step 4: Put the activated carbon obtained in step 3) into a drying furnace, and dry the activated carbon at 70°C, 80°C, 90°C, and 100°C for 2 hours by a stepped heatin...

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Abstract

The invention discloses an acetylene-hydrochlorinated novel low-solid mercury catalyst, and meanwhile, the invention also provides a preparation method for the acetylene-hydrochlorinated novel low-solid mercury catalyst. According to the preparation method, the novel low-solid mercury catalyst is obtained by taking coal-based activated carbon as a carrier, taking mercuric chloride as a main catalytic composition, taking zinc chloride and potassium chloride as auxiliary catalytic compositions and stabilizers, performing spraying and dipping, and drying in a gradient heating mode; the low-solid mercury catalyst disclosed by the invention has the advantages of high catalytic activity, high heat stability, short induction period, and good catalytic conversion effect.

Description

technical field [0001] The invention relates to the field of chemical catalysis, in particular to a novel low-solid mercury catalyst for acetylene hydrochlorination, and a preparation method thereof. Background technique [0002] In recent years, the international community has made active efforts to limit the discharge and use of mercury. On January 19, 2013, the United Nations Environment Programme adopted the Minamata Convention, an international convention aimed at controlling and reducing mercury emissions on a global scale. The emission limits are specified in detail to reduce the damage caused by mercury to the environment and human health. my country is a big producer of polyvinyl chloride, among which the amount of mercury used in the production of polyvinyl chloride by calcium carbide method accounts for 60% of the national mercury consumption. my country's Ministry of Environmental Protection, Ministry of Industry and Information Technology and other 8 department...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/138
Inventor 李武斌陈明慧张彬易男王良栋梁丹泉罗军彭勇
Owner 贵州重力科技环保股份有限公司
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