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Method for preparing cobalt chloride solution

A technology of cobalt chloride and solution, applied in the field of preparation of cobalt chloride solution, can solve the problems of decreasing, increasing the cost of cobalt chloride, difficulty in purchasing and the like

Inactive Publication Date: 2014-04-30
NINGBO RONBAY LITHIUM BATTERY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, with the shrinking of mineral resources, the mining volume of cobalt-containing ore is gradually reduced, so it is more and more difficult to purchase, and the grade of cobalt-containing ore is gradually declining, and the cobalt content is generally below 5%, which greatly increases the acid leaching. At the same time, the impurity content rises accordingly, which further increases the acid leaching process and difficulty, and further increases the cost of cobalt chloride production

Method used

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preparation example Construction

[0029] The invention provides a kind of preparation method of cobalt chloride solution, comprises the following steps:

[0030] A) React electrolytic cobalt, mixed acid and water in the first-stage reaction vessel;

[0031] B) Add mixed acid to the above-mentioned first-stage reaction vessel, so that the solution in the first-stage reaction vessel overflows into the second-stage reaction vessel, and reacts with the electrolytic cobalt and water in the second-stage reaction vessel;

[0032] C) Continue to add the mixed acid to the above-mentioned first-level reaction vessel, so that the solution in the second-level reaction vessel overflows into the third-level reaction vessel, and reacts with the electrolytic cobalt and water in the third-level reaction vessel;

[0033] D) Continue to add the mixed acid to the above-mentioned first-level reaction vessel, so that the solution in the third-level reaction vessel overflows into the fourth-level reaction vessel, and reacts with the...

Embodiment 1

[0065]First, add 500kg metal cobalt and 1000L ion water into the 2L reaction kettle of the 1st to 5th grades, turn on the stirring paddle, and then pass a mixture of 3.7mol / L hydrochloric acid solution and 3.5mol / L nitric acid solution from the bottom of the reaction kettle Acid, control the temperature of each reactor of the 1st to 5th grades to be 100°C.

[0066] The first to sixth grade reactors are connected through the overflow tank, and the above-mentioned mixed acid is continuously introduced into the first grade reactor, so that the solution in the first grade reactor overflows to the second grade reactor through the overflow tank , react with the electrolytic cobalt and water in the second-level reactor; then overflow the solution in the second-level reactor to the third-level reactor, and react with the electrolytic cobalt and water in the third-level reactor ; make the solution in the 3rd grade reactor overflow to the 4th grade reactor, react with the electrolytic c...

Embodiment 2

[0071] First, add 400kg metal cobalt and 1200L ion water into the 2L reaction kettle of the 1st to 5th grades, turn on the stirring paddle, and then pass a mixture of 4.7mol / L sulfuric acid solution and 4.5mol / L nitric acid solution from the bottom of the reaction kettle Acid, control the temperature of each reactor of the 1st to 5th grades to be 85°C.

[0072] The first to sixth grade reactors are connected through the overflow tank, and the above-mentioned mixed acid is continuously introduced into the first grade reactor, so that the solution in the first grade reactor overflows to the second grade reactor through the overflow tank , react with the electrolytic cobalt and water in the second-level reactor; then overflow the solution in the second-level reactor to the third-level reactor, and react with the electrolytic cobalt and water in the third-level reactor ; make the solution in the 3rd grade reactor overflow to the 4th grade reactor, react with the electrolytic cobal...

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Abstract

The invention provides a method for preparing a cobalt chloride solution. The method comprises the following steps: reacting electrolytic cobalt, mixed acid and water in a first-stage reaction container, and adding the mixed acid into the first-stage reaction container, so that the solution in the first-stage reaction container overflows into a second-stage reaction container and reacts with electrolytic cobalt and water in the second-stage reaction container; continuously adding the mixed acid into the first-stage reaction container, so that the solution in the second-stage reaction container overflows into a third-stage reaction container, repeating the operations until the solution in a fifth-stage reaction container overflows into a sixth-stage reaction container and is mixed with water in the sixth-stage reaction container, and extracting to obtain the cobalt chloride solution. The preparation method provided in the invention is simple in production process, and the prepared cobalt chloride solution has low impurity content and is suitable for industrial continuous production.

Description

technical field [0001] The invention belongs to the technical field of inorganic synthesis, and in particular relates to a preparation method of cobalt chloride solution. Background technique [0002] Cobalt chloride, melting point 86°C, blue anhydrous, easily soluble in water, ethanol, ether, acetone and glycerin, easy to deliquescence crystal, its hydrate is pink to red monoclinic crystal, cobalt chloride crystal It exists stably at room temperature, turns blue when heated and loses water of crystallization, and turns red again in moist air. Its aqueous solution turns blue when heated, concentrated hydrochloric acid, chloride or organic solvents are added. It crystallizes at 30-45°C, begins to weather and become turbid, turns into tetrahydrate after heating at 45-50°C, and becomes anhydrous when heated to 110°C. [0003] Cobalt chloride has a wide range of uses in industrial manufacturing and daily necessities production. It is used in the production of barometers, hydro...

Claims

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Application Information

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IPC IPC(8): C01G51/08
Inventor 陆益展沈恒冠蔡运和朱珠刘传平
Owner NINGBO RONBAY LITHIUM BATTERY MATERIAL CO LTD