Method for continuously preparing nickelous hydroxide

A nickel hydroxide and nickel salt technology, applied in the direction of nickel oxide/nickel hydroxide, uranium halide, electrical components, etc., can solve the problems of nickel hydroxide grain growth, large particles, no mention, etc., to ensure consistency sexual effect

Active Publication Date: 2006-10-25
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] In the continuous production of spherical nickel hydroxide by the chemical precipitation crystal growth method, as the crystal grows, the nickel hydroxide grains will gradually grow up, and even grow into very large particles, and the particle size and particle size distribution cannot meet the requirements
Control the average particle size and particle size distribution of nickel hydroxide within an appropriate range, which is not mentioned in existing patents

Method used

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  • Method for continuously preparing nickelous hydroxide
  • Method for continuously preparing nickelous hydroxide
  • Method for continuously preparing nickelous hydroxide

Examples

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Comparison scheme
Effect test

Embodiment 1

[0043] A kind of preparation method of nickel hydroxide, its step is as follows:

[0044] (1) Preparation of raw material solution

[0045] (A) preparation of nickel salt solution: preparation concentration is the nickel nitrate aqueous solution of 1.0mol / L;

[0046] (B) the selection of lye: preparation concentration is 2.0mol / L sodium hydroxide solution;

[0047] (C) Preparation of ammonia solution: dissolve liquid ammonia in water to a concentration of 2.0 mol / L.

[0048] (2) Periodic growth process of nickel hydroxide crystal

[0049] (D) by a precision metering pump, mix nickel salt solution, lye and ammonia solution at a certain flow rate (the flow rate is represented by x, y, z respectively, 50

[0050] (E) Stir continuously, control the reaction temperature to be 30° C., the pH value of the reaction system is 8.5, and the stirring speed is 100 rpm to carry out chemical precipitation reaction an...

Embodiment 2

[0057] A kind of preparation method of nickel hydroxide, its step is as follows:

[0058] (1) Preparation of raw material solution

[0059] (A) the preparation of nickel salt solution: preparation concentration is the nickel chloride aqueous solution of 1.5mol / L;

[0060] (B) the selection of lye: preparation concentration is that 4.0mol / L sodium hydroxide solution and concentration are 4.0mol / L potassium hydroxide solution, mix by same weight ratio;

[0061] (C) Preparation of ammonia solution: dissolve liquid ammonia in water to a concentration of 4.0 mol / L.

[0062] (2) Periodic growth process of nickel hydroxide crystal

[0063] (D) by a precision metering pump, the nickel chloride solution, the mixed lye and the ammonia solution are pressed at a certain flow rate (the flow rate is represented by x, y, z respectively, 50

[0064] (E) Stir continuously, control the reaction temperature to be 80° C....

Embodiment 3

[0071] A kind of preparation method of nickel hydroxide, its step is as follows:

[0072] (1) Preparation of raw material solution

[0073] (A) the preparation of mixed nickel salt solution: the nickel sulfate aqueous solution that preparation concentration is 2.0mol / L and the nickel nitrate aqueous solution that concentration is 2.0mol / L and mix by same weight ratio;

[0074] (B) selection of lye: preparation concentration is 6.0mol / L lithium hydroxide solution;

[0075] (C) Preparation of ammonia solution: 25% ammonia solution is dissolved in water, the concentration is 7.0mol / L.

[0076] (2) Periodic growth process of nickel hydroxide crystal

[0077] (D) Mix the nickel salt solution, lithium hydroxide solution and ammonia solution by a precision metering pump at a certain flow rate ratio (the flow rate is represented by x, y, z respectively, 50

[0078] (E) keep stirring, control the reaction temp...

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Abstract

This invention is related to a method for continuously producing nickelous hydroxide, especially is related to the chemical deposition crystal growing method. This invention discloses a chemical deposition crystal growing method that can effectively control the average particle diameter and particle size distribution (PSD) to make ball-shaped nickelous hydroxide. Through technique parameter adjustment, it changes the crystallization condition of nickelous hydroxide, and periodically produces the new crystal nucleus of nickelous hydroxide, and restrains the big particles to grow continuously. The new crystal nucleuses re-grow and effectively control the particle everage diameter and PSD.

Description

technical field [0001] The invention relates to a preparation method for continuously producing nickel hydroxide, in particular to a chemical precipitation crystal growth method for preparing nickel hydroxide. Background technique [0002] Nickel hydroxide (Ni(OH) 2 ) as alkaline rechargeable batteries (such as Ni / MH, Ni / Cd, Ni / Zn, Ni / Fe, Ni / H 2 etc.), the research on its preparation technology has been carried out for many years, especially in recent years, with the development of a new generation of high specific energy green nickel-hydrogen batteries in mobile communications, personal electronic equipment, power tools and electric vehicles, etc. Widely used, the research on nickel hydroxide material and its preparation technology has also received more and more attention. [0003] At present, Ni / MH, Ni / Cd and other rechargeable batteries use β crystal nickel hydroxide. The preparation methods of β-crystalline nickel hydroxide mainly include chemical precipitation cryst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/04H01M4/52C01G43/04
CPCY02E60/10
Inventor 蒋文全傅钟臻于丽敏
Owner GRIMAT ENG INST CO LTD
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