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Preparation method of homogeneous complex catalyst for acetylene hydrochlorination

A technology of acetylene hydrochlorination and catalyst, which is applied in the production of bulk chemicals, etc. It can solve the problems of poor catalytic conversion effect and short service life, and achieve the effect of long service time, many catalytic active sites and good catalytic conversion effect

Active Publication Date: 2017-05-24
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

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Problems solved by technology

[0003] The applicant found that: compared with the traditional high-mercury catalyst (10%-12.5%), the current low-mercury catalyst (4%-6.5%) has the problems of short service life and poor catalytic conversion effect during use, so it is necessary to Research on a new homogeneous complex catalyst for acetylene hydrochlorination, which can solve the above problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In terms of weight percentage, the finished complex catalyst contains 6.5% of mercuric chloride and 4% of potassium chloride for calculation, and based on this, related solutions are prepared. This embodiment includes the following steps:

[0023] Step 1: Activated carbon pretreatment: Treat the activated carbon with hydrochloric acid solution, the pH value of the hydrochloric acid solution is ≤3, the temperature is 75-100°C, and the treatment time is 1 hour;

[0024] Step 2: Prepare the mercury chloride aqueous solution by stirring in the dissolution tank, and adjust the pH value to ≤3 with hydrochloric acid solution;

[0025] Step 3: Step 2) adds potassium chloride by stirring in the solution prepared to generate complex potassium tetrachloromercurate solution, and the amount of substance added by potassium chloride is 2 times of the amount of mercuric chloride substance in the solution ;

[0026] Step 4: impregnate the activated carbon with the complex potassium te...

Embodiment 2

[0030] In terms of weight percentage, the finished complex catalyst contains 6.5% of mercuric chloride and 4% of potassium chloride for calculation, and based on this, related solutions are prepared. This embodiment includes the following steps:

[0031] Step 1: Activated carbon pretreatment: Activated carbon is treated with hydrochloric acid solution, the pH value of the hydrochloric acid solution is ≤3, the temperature is 50°C, and the treatment time is 1 hour;

[0032] Step 2: Prepare the mercury chloride aqueous solution by stirring in the dissolution tank, and adjust the pH value to ≤3 with hydrochloric acid solution;

[0033] Step 3: Separately configure potassium chloride solution in another soaking tank, its pH value is less than or equal to 3, and the amount of potassium chloride in the solution is twice the amount of mercuric chloride in the solution;

[0034] Step 4: First impregnate the activated carbon with the mercuric chloride solution prepared in step 2), the ...

Embodiment 3

[0038] In terms of weight percentage, the finished complex catalyst contains 5% of mercuric chloride and 3% of potassium chloride for calculation, and based on this, related solutions are prepared. This embodiment includes the following steps:

[0039] Step 1: Activated carbon pretreatment: Activated carbon is treated with hydrochloric acid solution, the pH value of the hydrochloric acid solution is ≤3, the temperature is 50°C, and the treatment time is 1 hour;

[0040] Step 2: Prepare the mercury chloride aqueous solution by stirring in the dissolution tank, and adjust the pH value to ≤3 with hydrochloric acid solution;

[0041] Step 3: in the solution that step 2) prepares, add potassium chloride by stirring mode, generate complex potassium tetrachloromercuric acid solution, the amount of the substance that potassium chloride adds is 2% of the amount of mercuric chloride substance in the solution times;

[0042] Step 4: impregnate activated carbon with the complex potassiu...

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Abstract

The invention discloses a preparation method for an ethyne hydrochlorination homogeneous complex catalyst. According to the method, the ethyne hydrochlorination homogeneous complex catalyst is prepared by using mercuric chloride and potassium chloride as a precursor to synthesize a potassium mercuric chloride complex under the acidic condition and the high potassium ion concentration condition, using activated carbon as a carrier, and adopting a dipping and drying process. The prepared catalyst is high in thermal stability, uniform in distribution of active ingredients, high in dispersity, large in number of active points, and good in catalytic conversion effect.

Description

technical field [0001] The invention relates to the field of chemical catalysis, in particular to a preparation method of a homogeneous complex catalyst for acetylene hydrochlorination, and also to a homogeneous complex catalyst for acetylene hydrochlorination. Background technique [0002] Mercury chloride adsorbed by activated carbon is used as a catalyst in the production process of calcium carbide polyvinyl chloride. Because mercuric chloride is a molecular crystal, the catalytic addition reaction of acetylene and hydrogen chloride is an exothermic reaction. High temperature and sublimation loss not only cause waste of mercury resources, but also seriously pollute the environment. The United Nations Environmental Protection Agency, the National Environmental Protection Cooperation Organization, members of the International Mercury Convention, and my country's National Development and Reform Commission, Industry and Information Technology Commission, and the Ministry of E...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F14/06C08F4/50
CPCY02P20/52
Inventor 李武斌陈明慧张彬易南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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