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Nickelous oxide dead catalyst dissolution processing method

A technology of waste catalyst and treatment method, applied in nickel halide, chemical recycling and other directions, can solve the problems of high melting point, low leaching and dissolution rate, difficult melting, etc., achieve effective recovery, high leaching and dissolution rate, and solve production technical problems Effect

Active Publication Date: 2008-07-16
JINCHUAN GROUP LIMITED
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

It has a very high melting point and is difficult to melt in converters and anode furnaces for nickel smelting; although it can be leached and dissolved, the leaching and dissolution rate in general acidic and oxidizing media is very low, less than 70%, and it is still difficult to handle

Method used

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  • Nickelous oxide dead catalyst dissolution processing method

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Effect test

Embodiment 4

[0018] Use a 0.9mm sieve to sieve stones and other massive materials, and use the nickel oxide under the sieve for later use; add 500ml of hydrochloric acid solution and 500ml of water into a 3000ml beaker, start stirring and heat to 80°C; take the nickel oxide under the above sieve Nickel 100g, slowly added to the beaker for 5 hours, the process control oxidation potential is 0.5V; until the solution turns black and green, stirring has no obvious suspended solids; keep the volume of the solution unchanged; filter the leachate, and analyze the solution containing nickel 75.2g / L; the leaching residue after weighing and drying is 4.3g.

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Abstract

The invention relates to a dissolution method for treating nickel oxide waste catalyst, which is characterized in that the dissolution treatment process comprises the steps: the nickel oxide waste catalyst which is screened blocky material such as scree and slag is put into the hydrochloric acid solution with a concentration above 5N / L; under a temperature ranging from 85 DEG C to 100 DEG C and under a stirring condition, the oxidant sodium chlorate is added or the chorine is implanted and the oxidation potential is controlled to be 0.5-1.0V; the dissolution reaction is carried out for 1-5 hours to obtain green nickel chloride solution. The method of the invention has high leaching rate and dissolution ratio; high temperature treatment and pressure treatment are not required, which reduces cost and solves the difficult problem of production technology. Combined with prior process of nickel electrolysis, the nickel in the waste catalyst can be effectively recycled.

Description

technical field [0001] The invention relates to a method for dissolving waste nickel oxide catalysts. Background technique [0002] Nickel oxide waste catalyst is a black and black green powder with molecular formula NiO, with a small amount of massive materials in the middle, such as stones or slag; chemical analysis contains about 78% nickel, equivalent to a purity of more than 98% of nickel oxide, while Phase analysis shows that it contains a certain amount of metallic nickel. It has a very high melting point and is difficult to melt in converters and anode furnaces for nickel smelting; although it can be leached and dissolved, the leaching and dissolution rate in general acidic and oxidizing media is very low, less than 70%, and it is still difficult to handle . Contents of the invention [0003] The object of the present invention is to aim at the deficiencies in the existing technology and provide a method for dissolving spent nickel oxide catalysts with simple pro...

Claims

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Application Information

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IPC IPC(8): C01G53/09
CPCY02P20/584
Inventor 蔺国盛张晗郭小英
Owner JINCHUAN GROUP LIMITED
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