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Method for producing tin chloride and elemental mercury by using mercury-containing waste catalyst

A mercury waste catalyst, waste mercury catalyst technology, applied in the direction of tin chloride, tin halide, improvement of process efficiency, etc., can solve the problems of ineffective utilization of waste mercury, secondary pollution, etc., and achieve pollution prevention and high economic benefits. Effect

Inactive Publication Date: 2016-08-24
常德湘大环保科技有限公司
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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] Stannic chloride and elemental mercury are produced from the spent mercury catalyst 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 293-309°C 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 tin protochloride with a pure mass ratio of 1: 0.5 to generate tin chloride and elemental mercury mixed solution; the mixed solution is obtained through closed suction filtration of filter cake elemental mercury, Obtain elemental mercury product 18.5Kg through washing, dehydration and packaging; The clarified tin chloride solution is processed in the next step;

[0018] The 3rd step, the tin chloride solution that above-mentioned obtains is sent in the normal pressure distiller and carries out distillation, when tin c...

Embodiment 2

[0020] Stannic chloride and elemental mercury are produced from the spent mercury catalyst 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 293-309°C 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 tin protochloride with a pure mass ratio of 1: 0.7 to generate tin chloride and elemental mercury mixed solution; the mixed solution is obtained through closed suction filtration of filter cake elemental mercury, Obtain elemental mercury product 25.9Kg through washing, dehydration and packaging; The clarified tin chloride solution is processed in the next step;

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

Embodiment 3

[0025] Stannic chloride and elemental mercury are produced from the spent mercury catalyst 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 293-309°C 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 tin protochloride with a pure mass ratio of 1: 0.9 to generate tin chloride and elemental mercury mixed solution; the mixed solution is obtained through closed suction filtration of filter cake elemental mercury, Obtain elemental mercury product 33.2Kg through washing, dehydration and packaging; The clarified tin chloride solution is processed in the next step;

[0028] The 3rd step, the tin chloride solution that above-mentioned obtains is sent in the normal pressure distiller and carries out distillation, when tin c...

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PUM

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Abstract

The invention relates to a method for producing tin chloride and elemental mercury by using a mercury-containing waste catalyst, which relates to the technical field of three-waste treatment and utilization of an organic industrial waste mercury catalyst. The tin chloride and elemental mercury can be obtained by the following three steps: the waste mercury catalyst is sent to a sealed-type distiller for distillation, mercuric chloride is directly sublimated to gas, then cooled to mercuric chloride liquid; then an above mercuric chloride solution and stannous chloride are subjected to a reaction, a mixing solution of tin chloride and the elemental mercury is generated; the mixing solution is subjected to enclosed pumping filtration to obtain a filter cake elemental mercury, then the filter cake elemental mercury is washed, dehydrated and packaged to obtain the elemental mercury product; and finally the tin chloride solution is sent to a normal pressure distiller for distillation, when tin chloride reaches a saturated solution, cooling crystals are discharged, and crushed and packaged to obtain the tin chloride crystals finished product. The method effectively prevents pollution of the waste mercury catalyst on environment, performs comprehensive utilization on the waste mercury catalyst, and provides high economic benefit for the enterprises 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 producing tin chloride and elemental mercury by utilizing waste mercury-containing catalysts. Background technique [0002] In the synthesis of vinyl chloride by the acetylene method, a high-mercury catalyst with a mercuric chloride content of 10 wt% is used industrially. Because 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): C01G19/08C22B43/00C22B7/00
CPCY02P10/20
Inventor 徐联菊
Owner 常德湘大环保科技有限公司
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