Preparation method of high-purity nickel protoxide

A nickel oxide, high-purity technology, applied in nickel oxide/nickel hydroxide and other directions, can solve the problems that the fineness cannot reach high-end manufacturing, the thermal decomposition temperature of nickel chloride is high, and the purity of nickel oxide is not high. The effect of short preparation time, low cost and narrow particle size distribution

Pending Publication Date: 2021-03-30
浙江博瓦德新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Due to the high thermal decomposition temperature of nickel chloride, the nickel oxide obtained by spray pyrolysis often contains more than 1000ppm of chlorine radicals, and subsequent high-temperature calcination to prepare nickelous oxide will cause air pollution, severely corrode equipment, and residual chlorine radicals will cause When it is used as a battery material, battery gas production is more serious and other problems
[0008] The nickel oxide produced by the existing domestic spray pyrolysis technology is not high in purity, the particle dispersion is not good, and the fineness cannot meet the requirements of high-end manufacturing industries

Method used

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  • Preparation method of high-purity nickel protoxide

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Effect test

Embodiment 1

[0033] A preparation method of high-purity nickelous oxide is realized through the following steps:

[0034] Step 1, select nickel nitrate as raw material, add pure water to prepare the nickel nitrate solution of 1.7~2.5mol / L;

[0035] Step 2, the nickel nitrate solution in step 1 is purified, and the purification process uses P507 as an extractant to extract and remove cobalt, remove the cobalt to below 0.005g / L, adjust the pH to 4.0, remove iron impurities, and obtain iron low Nickel salt solution at 0.005g / L;

[0036] Step 3, adding the nickel nitrate solution into the spray pyrolysis device, and then adding 0.2% polyethylene glycol of the total mass of the solution;

[0037] Step 4: Set the spray pressure of the spray pyrolysis device to 0.2MPa, the pyrolysis temperature to 600°C, and the pyrolysis atmosphere to be air atmosphere, start the spray pyrolysis device to prepare nickel oxide, and the tail gas produced by spray pyrolysis is sprayed An acidic solution is obtain...

Embodiment 2

[0041] A preparation method of high-purity nickelous oxide is realized through the following steps:

[0042] Step 1, select nickel chloride as raw material, add pure water to prepare the nickel chloride solution of 2.5mol / L;

[0043] Step 2, purify the nickel chloride solution in step 1, use Cyanex272 as the extractant to extract and remove cobalt in the purification treatment, remove the cobalt to below 0.005g / L, adjust the pH to 4.6, remove iron impurities, and obtain iron after filtration Nickel salt solution lower than 0.005g / L;

[0044] Step 3, adding the nickel chloride solution to the spray pyrolysis device, and then adding polyacrylamide with a total mass of 2.0% of the solution;

[0045]Step 4: Set the spray pressure of the spray pyrolysis device to 1.0MPa, the pyrolysis temperature to 950°C, and the pyrolysis atmosphere to be an oxygen atmosphere, start the spray pyrolysis device to prepare nickel oxide, and the tail gas produced by spray pyrolysis is sprayed An ac...

Embodiment 3

[0049] A preparation method of high-purity nickelous oxide is realized through the following steps:

[0050] Step 1, select nickel acetate soluble salt as raw material, add pure water to prepare the nickel acetate solution of 2.0mol / L;

[0051] Step 2, purify the nickel acetate solution in step 1, use Cyanex272 as the extractant to extract and remove cobalt in the purification treatment, remove the cobalt to below 0.005g / L, adjust the pH to 4.3, remove iron impurities, and obtain iron low Nickel salt solution at 0.005g / L;

[0052] Step 3, nickel acetate solution is added in the spray pyrolysis device, then add the sodium lauryl sulfate of solution gross mass 1.0%;

[0053] Step 4: Set the spray pressure of the spray pyrolysis device to 0.6MPa, the pyrolysis temperature to 780°C, and the pyrolysis atmosphere to be air atmosphere, start the spray pyrolysis device to prepare nickel oxide, and the tail gas produced by spray pyrolysis is sprayed An acidic solution is obtained aft...

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Abstract

The invention relates to a preparation method of high-purity nickel protoxide. The preparation method comprises the following steps: dechlorinating nickel oxide obtained by spray pyrolysis, and condcuting calcining at high temperature to obtain nickel protoxide powder with higher purity. The preparation method does not generate wastewater, has the advantages of stable technique and high product purity, and can prepare a high-purity nickel protoxide product with a nickel content of 77% or more, a cobalt content of 0.004% or less, an iron content of 0.004% or less, a calcium content of 0.004% orless and a chlorine content of 0.01% or less.

Description

technical field [0001] The invention belongs to the field of powder materials, in particular to a method for preparing high-purity nickelous oxide. Background technique [0002] Nickel oxide (NiO) appearance: light green or dark green powdery solid, properties: the specific gravity of this product is 6.6-6.8; the bulk density is 0.5-1.5; the tap density is 1.5-2.0; the Fischer particle size is 2-5 ; Insoluble in water, soluble in sulfuric acid, hydrochloric acid, nitric acid, ammonia. Uses: Nickel oxide powder materials are widely used in battery materials, catalyst materials, magnetic materials, electronic materials, ceramics, glass and other fields. It is used as an adhesive and colorant for enamel in the ceramic industry, and is used as a raw material for pigments in the ceramic industry. It is used as the raw material of nickel-zinc ferrite in the production of magnetic materials, as the colorant of brown glass and picture tube glass bulb in the glass industry, and als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/04
CPCC01G53/04C01P2004/03C01P2006/80
Inventor 崔玄子李积军
Owner 浙江博瓦德新材料科技有限公司
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