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Method for preparing zinc chloride and elementary mercury by using mercury-containing waste catalyst

A waste mercury catalyst and waste mercury catalyst technology, applied in zinc halide, solid waste removal, etc., can solve the problems of ineffective use of waste mercury, secondary pollution, etc., and achieve pollution prevention and considerable economic benefits

Inactive Publication Date: 2011-07-06
何侠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] First, the waste mercury after the reaction is not only not effectively utilized, but also causes secondary pollution;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The spent mercury catalyst is produced zinc chloride and elemental mercury through the following three steps:

[0016] The first step is to send 500Kg of waste mercury catalyst into a sealed still for distillation, turn on the power supply and heat it to 300-304 degrees Celsius to directly sublimate mercury chloride into gas, and then cool it into liquid mercury chloride;

[0017] In the second step, the mercuric chloride solution obtained above is reacted with zinc particles at a pure mass ratio of 1:0.04 to generate a mixed solution of zinc chloride and elemental mercury; , dehydration and packaging to obtain 4.3Kg of elemental mercury product; clarified zinc chloride solution is processed in the next step;

[0018] The 3rd step, the zinc chloride solution that above-mentioned obtains is sent in the normal pressure distiller and carries out distillation, when zinc chloride reaches saturated solution, discharge and cool crystallization, obtain zinc chloride crystal fin...

Embodiment 2

[0020] The spent mercury catalyst is produced zinc chloride and elemental mercury through the following three steps:

[0021] The first step is to send 500Kg of waste mercury catalyst into a sealed still for distillation, turn on the power supply and heat it to 300-304 degrees Celsius to directly sublimate mercury chloride into gas, and then cool it into liquid mercury chloride;

[0022] In the second step, the mercuric chloride solution obtained above is reacted with zinc particles at a pure mass ratio of 1:0.24 to generate a mixed solution of zinc chloride and elemental mercury; the mixed solution is closed suction filtered to obtain filter cake elemental mercury, which is washed , dehydration and packaging to obtain 25.8Kg of elemental mercury product; clarified zinc chloride solution is processed in the next step;

[0023] The 3rd step, the zinc chloride solution that above-mentioned obtains is sent in the normal pressure distiller and carries out distillation, discharges ...

Embodiment 3

[0025] The spent mercury catalyst is produced zinc chloride and elemental mercury through the following three steps:

[0026] The first step is to send 500Kg of waste mercury catalyst into a sealed still for distillation, turn on the power supply and heat it to 300-304 degrees Celsius to directly sublimate mercury chloride into gas, and then cool it into liquid mercury chloride;

[0027] In the second step, the mercuric chloride solution obtained above is reacted with zinc particles at a pure mass ratio of 1:0.44 to generate a mixed solution of zinc chloride and elemental mercury; , dehydration and packaging to obtain 47.4Kg of elemental mercury product; clarified zinc chloride solution is processed in the next step;

[0028] The 3rd step, the zinc chloride solution that above-mentioned obtains is sent in the normal pressure distiller and carries out distillation, when zinc chloride reaches saturated solution, discharge and cool crystallization, obtain zinc chloride crystal fi...

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PUM

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Abstract

The invention discloses a method for preparing zinc chloride and elementary mercury by using a mercury-containing waste catalyst and relates to the technical field of waste gas, waste water and industrial residue treatment and utilization of an organic industrial waste mercury catalyst. The zinc chloride and elementary mercury are prepared from waste mercury catalyst by the following three steps: firstly, filling the waste mercury catalyst into a sealed distiller for distillation to allow mercury to sublime into gas directly, and cooling to obtain liquid mercury chloride; reacting the obtained solution of mercury chloride with zinc particles to obtain mixed solution of zinc chloride and elementary mercury; secondly, performing suction-filtration on the mixed solution in a sealed manner to obtain an elementary mercury filter cake, and washing, dewatering and packaging to obtain an elementary mercury product; and finally, filling the obtained solution of zinc chloride into a normal pressure distiller for distillation, discharging saturated solution of zinc chloride, cooling, crystallizing, crushing and packing to obtain a zinc chloride crystal product. When the method is used, the pollution of waste mercury catalyst to the environment is prevented effectively, and high economic benefit is created at the same time.

Description

technical field [0001] The invention relates to the technical field of three wastes treatment and utilization of waste mercury catalysts in the organic industry, in particular to a method for preparing zinc chloride and elemental mercury from mercury-containing waste catalysts. Background technique [0002] In the reaction to synthesize vinyl chloride by the acetylene method, a high-mercury catalyst with a mercuric chloride content of 10wt% is used industrially. Since mercuric chloride is easily sublimated and lost during the reaction, it will cause harm to the environment. People are seeking ways to improve the mercury catalyst used for the synthesis of vinyl chloride by the acetylene method, trying to develop a low-mercury or non-mercury catalyst, so that it has a longer life under higher conversion and selectivity, and The harm to the environment is minimized, and a good foundation is laid for the industrial application of low-mercury or non-mercury catalysts in the futur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/04C22B43/00C22B7/00B09B3/00
Inventor 何侠
Owner 何侠
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