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Method for preparing silver chloride and coproducing mercuric oxide and aluminum nitrate by using mercury-containing dead catalyst

A waste mercury catalyst and waste mercury catalyst technology, which is applied in the direction of aluminum nitrate, mercury oxide, silver halide, 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

[0016] 500Kg of waste mercury catalysts are produced through the following three steps to produce silver chloride co-production of mercury oxide and aluminum nitrate:

[0017] The first step is to send the 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;

[0018] In the second step, the mercuric chloride solution obtained above is reacted with the silver nitrate solution with a pure mass ratio of 1:1.05 to generate a mixed solution of silver chloride precipitation and mercuric nitrate; Washing and drying, pulverizing and packaging to obtain 31Kg of silver chloride product; the clarified mercuric nitrate solution is processed in the next step;

[0019] The third step is to react the mercuric nitrate solution obtained above with the aluminum hydroxide emulsion at a pure mass ratio of 1:0.08 to generate a mixed...

Embodiment 2

[0021] 500Kg of waste mercury catalysts are produced through the following three steps to produce silver chloride co-production of mercury oxide and aluminum nitrate:

[0022] The first step is to send the 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;

[0023] In the second step, the mercuric chloride solution obtained above is reacted with the silver nitrate solution with a pure mass ratio of 1:1.25 to generate a mixed solution of silver chloride precipitation and mercuric nitrate; Washing and drying, pulverizing and packaging to obtain 36.9Kg of silver chloride product; clarified mercuric nitrate solution is processed in the next step;

[0024] The third step is to react the mercuric nitrate solution obtained above with the aluminum hydroxide emulsion at a pure mass ratio of 1:0.28 to generate a mixed s...

Embodiment 3

[0026] 500Kg of waste mercury catalysts are produced through the following three steps to produce silver chloride co-production of mercury oxide and aluminum nitrate:

[0027] The first step is to send the 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;

[0028] In the second step, the mercuric chloride solution obtained above is reacted with the silver nitrate solution with a pure mass ratio of 1: 1.45 to generate a mixed solution of silver chloride precipitation and mercuric nitrate; then obtain filter cake silver chloride through closed suction filtration, and Washing and drying, pulverizing and packaging to obtain 42.8Kg of silver chloride product; the clarified mercuric nitrate solution is processed in the next step;

[0029] The third step is to react the mercuric nitrate solution obtained above with ...

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PUM

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Abstract

The invention discloses a method for preparing silver chloride and coproducing mercuric oxide and aluminum nitrate by using a mercury-containing dead catalyst, which relates to the technical field of treatment and utilization of three wastes of the dead mercury catalyst in the organic industry. The method comprises the following steps of: firstly, conveying the dead mercury catalyst into a sealed distiller for distilling to ensure that mercuric chloride directly sublimates into gas and then cools into liquid mercuric chloride; secondly, making an obtained mercuric chloride solution react with a silver nitrate solution to generate silver chloride precipitates and a mercuric nitrate mixed solution; thirdly, performing suction filtration in the enclosed state to obtain a silver chloride filter cake, washing, drying, smashing and packing to obtain a silver chloride product; fourthly, subjecting a clarified mercuric nitrate solution to a next-step machining; fifthly, making the obtained mercuric nitrate solution react with aluminum hydroxide emulsion to generate mercuric oxide precipitates and an aluminum nitrate mixed solution; sixthly, filtering to obtain a mercuric oxide filter cake, washing, drying in a spinning way, drying and packing to obtain a mercuric oxide product; and lastly, distilling, cooling, crystallizing and packing the clarified aluminum nitrate solution to obtain an aluminum nitrate crystal product. By adopting the method, environmental pollution caused by the dead mercury catalyst can be effectively prevented, and high economic benefit is achieved.

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 silver chloride and co-producing mercury oxide and aluminum nitrate 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 no...

Claims

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Application Information

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IPC IPC(8): C01G5/02C01G13/02C01F7/66B09B3/00
Inventor 何侠
Owner 何侠