Nickelous oxide waste catalyst dissolution processing method

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

Active Publication Date: 2010-06-09
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 waste catalyst dissolution processing method

Examples

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Effect test

Embodiment 1

[0012] Use a 0.9mm industrial sieve to sieve block materials such as small stones and slag in the spent catalyst-nickel oxide; add the nickel oxide sieved to remove block materials in 5mol / l hydrochloric acid, and at a temperature of 85°C, stir Under the conditions, adding the oxidant sodium chlorate, the oxidation potential of the control system is 0.5V; the dissolution time is 5 hours to obtain a green nickel chloride solution; the slag rate of the leached solution is less than 5%;

Embodiment 2

[0014] Use a 0.9mm industrial sieve to sieve the spent catalyst-nickel oxide, such as pebbles, slag and other massive materials; add the nickel oxide that has been sieved to remove the massive material in 6mol / l hydrochloric acid, and at a temperature of 100 ° C, in a stirring Under certain conditions, the oxidation potential of the chlorine gas control system is 1.0V and the dissolution time is 1 hour to obtain a green nickel chloride solution; the slag rate of the solution after dissolution or leaching is less than 5%;

Embodiment 3

[0016] Use a 0.9mm industrial sieve to sieve the waste catalyst-nickel oxide, such as pebbles and slag, add nickel oxide to 5.5mol / l hydrochloric acid, and stir at a temperature of 900°C Under the condition of oxidizing agent sodium chlorate, the oxidation potential of the control system is 1.0V; the dissolution time is 3 hours to obtain a green nickel chloride solution; the slag rate of the leached solution is less than 5%;

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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 reducescost 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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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/09
CPCY02P20/584
Inventor 蔺国盛张晗郭小英
Owner JINCHUAN GROUP LIMITED
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