Method for preventing amorphous cobaltous hydroxide from being oxidized in purification process

A cobaltous hydroxide, oxidized technology, applied in the direction of cobalt oxide/cobalt hydroxide, etc., can solve the problems of inability to achieve separation and purification effect, oxidation, and low concentration of antioxidants.

Active Publication Date: 2016-10-12
HUNAN CNGR NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since cobaltous hydroxide is unstable, it is easily oxidized by a large amount of oxygen contained in the deionized water used for washing and separation, so an antioxidant is urgently needed to prevent the oxidation of amorphous cobaltous hydroxide during purification
Moreover, when some antioxidants are added in the prior art, they are all added at one time, resulting in lower and lower concentrations of antioxidants in the deionized water, which cannot achieve a good separation and purification effect

Method used

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  • Method for preventing amorphous cobaltous hydroxide from being oxidized in purification process

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Embodiment approach

[0034]In a specific work project, the spraying device used includes two pressure plates 1 that can be pressed or loosened to each other, and a filter bag 2 for filtering the above-mentioned products is arranged between the pressure plates, and the upper side of the pressure plate 1 is provided with The first channel 3 through which the washing liquid can flow through has several spray holes 17 horizontally in the middle range of at least one pressing plate 1, and the at least one pressing plate includes multiple technical solutions, including any one of the two pressing plates Spray holes are provided, or both pressure plates are provided with spray holes; the washing liquid flowing through the first channel 3 washes the product in the filter bag 2 from top to bottom, and the water flowing through several spray holes 17 The supplementary liquid is sprayed from the middle range to the product and collected with the washing liquid; each spray hole 17 communicates with one end of ...

Embodiment 1

[0037] Embodiment 1: Add 0.01g / L vitamin C to deionized water, stir evenly to prepare washing solution; pump the above-mentioned washing solution to a plate and frame filter press containing 100kg of product, and the filter press will oxidize the filtered hydrogen The cobaltous product is compacted and the washing liquid is washed from top to bottom or from bottom to top; during the washing process, the spray device provided on the filter press continues to add the cobaltous hydroxide product from the middle range to the product every minute The vitamin C supplement solution with a concentration of 0.01g / L, the vitamin C supplement solution and the washing solution are combined to wash the product together. After washing for 2 hours, 20 tons of washing water are consumed. In the obtained cobaltous hydroxide product, the sodium ion content is 300ppm, and the oxidation rate of cobaltous hydroxide is 4%.

Embodiment 2

[0038] Embodiment two: add 1000g / L vitamin C to deionized water, stir and be mixed with washing liquid; Above-mentioned washing liquid is pumped to the plate and frame filter press that contains 100kg product, and the filter press will press-filtered oxyhydroxide The cobalt product is compacted and the washing liquid is washed from top to bottom or from bottom to top; during the washing process, the spray device provided on the filter press continues to add concentration per minute to the cobaltous hydroxide product from the middle range It is a 10g / L vitamin C supplement solution, and the vitamin C supplement solution and the washing solution are combined to wash the product together. After washing for 8 hours, 50 tons of washing water are consumed. In the obtained cobaltous hydroxide product, the sodium ion content is 248ppm, and the oxidation rate of cobaltous hydroxide is 1.64%.

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Abstract

The invention relates to a method for preventing amorphous cobaltous hydroxide from being oxidized in the purification process. The method comprises the following steps: 1, adding an antioxidant to deionized water, and uniformly stirring the antioxidant and deionized water to prepare a washing solution; 2, pumping the washing solution to a filter press, compressing the filter-pressed cobaltous hydroxide product by the filter press, and washing the product with the washing solution from top to bottom or from bottom to top; 3, spraying a supplementing solution on the cobaltous hydroxide product from a middle range by a spraying device arranged on the filter press in the washing process to realize simultaneous washing of the product after the supplementing solution meets with the washing solution; and 4, loosening the filter press after the washing process, and taking out the cobaltous hydroxide product. The method has the advantages of simple technology and high economy values; and vitamin C is added to deionized water in batches and is used in washing in order to reduce sodium ions in the product, so the purity of the washed product is high.

Description

technical field [0001] The invention relates to an application process of an antioxidant during purification, in particular to a method for preventing amorphous cobaltous hydroxide from being oxidized during purification. Background technique [0002] With the continuous development of my country's economy and technology, the use of energy has also increased, especially the rapid development of industry, which consumes a lot of battery energy, and the harmful substances produced are likely to cause damage to the ecological environment. Therefore, the country puts forward higher requirements on the use of energy, not only to improve the efficiency of energy use, but also to achieve energy conservation and emission reduction, and to strengthen the purpose of natural ecological protection. Therefore, it is extremely important to improve the structure of battery energy devices, especially the preparation of high-purity battery energy materials. [0003] Lithium cobalt oxide was...

Claims

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Application Information

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IPC IPC(8): C01G51/04
CPCC01G51/04
Inventor朱忠泗涂勇訚硕尹桂珍刘兴国
OwnerHUNAN CNGR NEW ENERGY TECH CO LTD