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Method for preparing spherical carbonate

A technology of carbonate and ammonium carbonate, applied in nickel carbonate, cobalt carbonate, chemical instruments and methods, etc., can solve the problems of high energy consumption, high processing and operation costs, and achieve low energy consumption, excellent indicators, The effect of reducing consumption

Active Publication Date: 2010-10-13
ZHEJIANG HUAYOU COBALT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the combination of membrane treatment concentration and evaporation crystallization is used to treat ammonia nitrogen wastewater, which has high energy consumption and high treatment and operation costs.

Method used

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  • Method for preparing spherical carbonate
  • Method for preparing spherical carbonate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Use the tail liquid ammonium chloride as the bottom liquid to synthesize spherical cobalt carbonate, complete in the following steps:

[0022] 1. Prepare the cobalt chloride solution with a concentration of 80g / L and the ammonium bicarbonate solution with a concentration of 150g / L;

[0023] 2. to 3m 3 Add 0.3m to the synthesis kettle 3 The tail liquid is used as the synthetic bottom liquid;

[0024] 3. Stir to heat up the bottom liquid, and stop heating when the temperature of the bottom liquid reaches 40-50°C;

[0025] 4. Start to add cobalt chloride solution and ammonium bicarbonate solution in parallel, the addition rate of metal chloride salt is 330L / h, the addition rate of ammonium carbonate salt is 600L / h, feed 2h, ammonium chloride, chloride in the tail liquid The mass ratio between cobalt chloride solution and ammonium bicarbonate is controlled at 0.06:1:3.4.

[0026] 5. The pH value of the solution at the end of the feeding is 7.0, and the temperature is ag...

Embodiment 2

[0031] Synthesize spherical nickel carbonate with tail liquid as bottom liquid, complete in the following steps:

[0032] 1. The concentration of the prepared nickel chloride solution is 150g / L, and the concentration of the ammonium bicarbonate solution is 230g / L.

[0033] 2. to 3m 3 Add 0.3m to the synthesis kettle 3 The tail liquid is used as the synthetic bottom liquid;

[0034] 3. Stir to heat up the bottom liquid, and stop heating when the temperature of the bottom liquid reaches 70-80°C;

[0035] 4. The addition speed of metal chloride salt is 380L / h, the addition speed of ammonium carbonate salt is 800L / h, feed 2h, the mass ratio between ammonium chloride, nickel chloride solution and ammonium bicarbonate in the tail liquid Controlled at 0.08:1:3.2.

[0036] 5. The pH value of the solution at the end of the feeding is 7.5, and the temperature is aged for 2 hours;

[0037] 6. After the aged slurry is filtered, washed and dried, a spherical nickel carbonate product i...

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Abstract

The invention discloses a method for preparing spherical carbonate serving as a cell fuel precursor. At present, the preparation of a nickel-cobalt lithium manganate anode material mainly adopts a co-precipitation method, and the obtained materials are generally irregular granules with low practical value. The method is characterized by comprising the following steps of: taking tail ammonium chloride solution as reaction base solution, adding metal chlorate solution and ammonium carbonate into the base solution at the same time with stirring to produce precipitation reaction at the temperature of between 40 and 80 DEG C, ensuring that the pH value of the solution at the end point is between 7.0 and 7.5, preserving heat and ageing the solution, and washing and drying the obtained slurry to obtain a spherical carbonate product, wherein the metal chlorate solution is one or mixture of cobalt chloride, nickel chloride and manganese chloride, and the concentration of the ammonium chloride is 10 to 30 grams per liter. The tail solution is used as the base solution, and the pH value of the solution at the end point is between 7.0 and 7.5 by using the liquid-phase precipitation method so that the spherical carbonate product with large grain diameter is obtained and all indexes are excellent.

Description

technical field [0001] The invention relates to the field of battery material precursors, in particular to a preparation method of spherical carbonate. Background technique [0002] Carbonates (cobalt carbonate, nickel carbonate and manganese carbonate) can be used in the fields of catalysts, electrochemistry, high temperature and corrosion resistance, magnetic materials and ceramic color glazes. [0003] The research on cathode materials for lithium-ion batteries mainly focuses on layered LiCoO 2 , LiNiO 2 , LiMnO 2 , spinel LiMn 2 o 4 and olivine-type LiFePO 4 Wait. However, the only large-scale commercial cathode material is LiCoO 2 , due to the limited reserves of cobalt resources, high price and toxicity, it is limited in the application of high-power power equipment, so people are constantly working on finding and developing LiCoO 2 alternative materials. [0004] In recent years, the new layered ternary composite oxide lithium nickel cobalt manganese oxide (L...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/06C01G53/06C01G45/00
Inventor 田礼平刘秀庆徐伟刘人生沈建清
Owner ZHEJIANG HUAYOU COBALT
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