Porous spherical nickel protoxide and preparation method thereof

A nickel oxide, porous spherical technology, applied in the direction of nickel oxide/nickel hydroxide, etc., can solve the problems of poor fluidity, difficulty in mixing uniformly, affecting product quality, etc., and achieve good fluidity, improve product quality, and uniform and stable color Effect

Inactive Publication Date: 2013-01-23
JINCHUAN GROUP LIMITED
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  • Claims
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Problems solved by technology

Also use the high-temperature spray pyrolysis method to produce nickelous oxide by high-temperature pyrolysis of nickel chloride solution. The nickelous oxide produced by this method is irregular in shape and has poor fluidity. It is not easy to mix evenly with other raw materials during use. The solution produces nickel oxide impurities, affecting product quality

Method used

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  • Porous spherical nickel protoxide and preparation method thereof
  • Porous spherical nickel protoxide and preparation method thereof

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Embodiment 1

[0022] Prepare nickel sulfate solution and ammonia water with a concentration of 2mol / L and 5mol / L respectively, prepare a sodium hydroxide solution with a pH value of 12.0 in the reaction kettle as the reaction bottom liquid; mix the nickel sulfate solution and ammonia water in a volume ratio of 1:0.2 After mixing evenly, add it to the reaction kettle for reaction, continuously stir the reaction solution, and control the pH value of the reaction solution at 12.0 by adding sodium hydroxide solution; control the reaction temperature at 55°C to obtain spherical nickel hydroxide; Ni(II) hydroxide was calcined at 800°C for 15 hours to obtain porous spherical Ni(II) oxide.

[0023] The prepared porous spherical NiO has a particle size distribution of D50=10um and a specific surface area of ​​15m 2 / g. Among them, D50=10um means that the particles with a particle size larger than 10um account for 50% of the nickel oxide particles, and the particles with a particle size smaller than...

Embodiment 2

[0025] Prepare the concentration of 1mol / L, 4mol / L nickel chloride solution and ammonia water respectively, and prepare a sodium hydroxide solution with a pH value of 12.5 in the reaction kettle as the reaction bottom liquid; After mixing evenly, add it to the reaction kettle for reaction, continuously stir the reaction solution, and add sodium hydroxide solution to control the pH value of the reaction solution at 12.5; control the reaction temperature at 58 ° C to obtain spherical nickel hydroxide; Spherical nickel hydroxide is calcined at 1000°C for 10 hours to obtain porous spherical nickel oxide.

[0026] The prepared porous spherical nickel oxide D50=3um, the specific surface area is 30m 2 / g.

Embodiment 3

[0028] Prepare nickel sulfate solution and ammonia water with concentrations of 2.5mol / L and 5mol / L respectively, and prepare potassium hydroxide solution with a pH value of 13 in the reaction kettle as the reaction bottom liquid; After mixing evenly, add it to the reactor for reaction, continuously stir the reaction solution, and add potassium hydroxide solution to control the pH value of the reaction solution at 13; control the reaction temperature at 50°C to obtain spherical nickel hydroxide; Spherical nickel hydroxide is calcined at 1400°C for 5 hours to obtain porous spherical nickel oxide.

[0029] The prepared porous spherical nickel oxide D50=7um, the specific surface area is 24m 2 / g.

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Abstract

The invention provides a porous spherical nickel protoxide of which the particle size distribution is 1um<=D50<=10um and the specific area is 15-30 m<2> / g. The preparation method of the porous spherical nickel protoxide comprises the following steps: respectively preparing a nickel salt solution and ammonia water according to the solute mol ratio of 1:(0.5-1), and preparing an alkali solution with the pH value of 12.0-13.0 in a reaction kettle as a reaction bottom solution; evenly mixing the nickel salt solution and ammonia water, and adding the mixture into the reaction kettle to react while continuously stirring the reaction solution, wherein the alkali solution is supplemented to control the pH value of the reaction solution at 12.0-13.0; controlling the reaction temperature at 50-60 DEG C to obtain spherical nickel hydroxide; and calcining the spherical nickel hydroxide at 800-1400 DEG C for 5-15 hours to obtain the porous spherical nickel protoxide. The nickel protoxide product provided by the invention appears porous spherical shape, and has the advantages of large specific area, uniform particle size and favorable flowability.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and relates to a porous spherical nickelous oxide and a preparation method thereof. Background technique [0002] Nickel oxide is widely used in battery materials, capacitors, catalyst materials, magnetic materials, ceramics, enamel and other fields. At present, the preparation method of nickelous oxide mainly uses alkali to directly precipitate the nickel in the nickel salt solution into nickel carbonate, basic nickel carbonate or nickel hydroxide and calcinate it. The product obtained by this method is an amorphous product with wide particle size distribution and shape. The appearance is uncontrollable and easy to sinter. Also use the high-temperature spray pyrolysis method to produce nickelous oxide by high-temperature pyrolysis of nickel chloride solution. The nickelous oxide produced by this method is irregular in shape and has poor fluidity. It is not easy to mix evenly with...

Claims

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Application Information

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IPC IPC(8): C01G53/04
Inventor 邓洪民
Owner JINCHUAN GROUP LIMITED
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