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Preparation method of high-purity anhydrous manganese chloride

An anhydrous manganese chloride and manganese chloride technology, applied in manganese halide and other directions, can solve the problems of uneven heat distribution, high local temperature, uneven heat distribution of materials, etc., and achieve the effect of simple operation and low cost

Inactive Publication Date: 2017-05-31
JIANGXI NORMAL UNIV
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Problems solved by technology

[0013] (2) Using conventional solid powder drying equipment such as oven type or double-cone rotary drying, the heat distribution of the material is uneven, resulting in excessive local temperature and hydrolysis of some products;
The process adopts double-cone rotary drying, and the heat distribution is uneven, resulting in excessive local temperature, oxidation and hydrolysis of some products, and high content of basic manganese chloride

Method used

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  • Preparation method of high-purity anhydrous manganese chloride

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Embodiment 1

[0043] (1) Manganese powder and hydrochloric acid react to generate manganese chloride solution

[0044] Add a certain amount of water and metal manganese powder (purity 99.4%, a small amount of impurities are mainly carbon, sulfur, phosphorus, silicon, iron and nickel, lead, etc.) in the reactor, stir and disperse, add hydrochloric acid (from pure Water absorbs hydrogen chloride gas preparation), until the manganese powder is completely dissolved, and the excess acid is mixed with a small amount of MnCO 3 Neutralization, the reaction releases a large amount of heat, cooled with water, the reaction produces a large amount of hydrogen and a small amount of HCl, water vapor (due to the higher reaction temperature), H 2 S.PH 3 Gases such as HCl and water vapor are condensed to the reactor through the condenser installed on the upper part of the reactor to continue to react with manganese powder, H 2 S.PH 3 Absorbed by the absorption device, the hydrogen is vented;

[0045] (2...

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Abstract

The invention discloses a preparation method of anhydrous manganese chloride. The method comprises the steps of enabling metal manganese powder to react with hydrochloric acid so as to obtain a manganese chloride solution; removing metal impurities in the manganese chloride solution, then carrying out spray drying on the manganese chloride solution to obtain a solid; dissolving the obtained solid into an alcoholic solvent, filtering, and drying the obtained filtrate by using a spray drying-vacuum rotating disk type drying combination technique to obtain the anhydrous manganese chloride which has the purity of more than or equal to 99.99% and the water content of less than or equal to 0.001%. The obtained anhydrous manganese chloride can meet the application requirements of the special fields such as medicines, high-quality magnesium-manganese alloy, aluminum-manganese alloy, high-purity manganese metal powder catalytic systems and cyclopentadienyl manganese high-efficiency gasoline antiknocks; furthermore, the preparation method of the anhydrous manganese chloride is simple in operation, low in cost and beneficial to industrial production.

Description

technical field [0001] The invention relates to a preparation method of anhydrous manganese chloride, in particular to a preparation method of high-purity anhydrous manganese chloride with a purity ≥ 99.99% and a water content of less than 0.001%, belonging to the technical field of manganese chloride preparation. Background technique [0002] High-purity anhydrous manganese chloride is widely used in medicine, high-quality magnesium-manganese alloy, aluminum-manganese alloy, high-purity metal manganese powder catalyst system, methanocene-based manganese-based high-efficiency gasoline antiknock agent and other compounds due to its high purity and uniform and stable quality. production. [0003] At present, there are three main processes for the production of anhydrous manganese chloride: [0004] (1) Metal manganese is prepared by reacting with chlorine gas at 700-1000°C. The reaction conditions of this process are harsh, the reaction is not easy to control, and the post-t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/06
CPCC01G45/06C01P2006/80
Inventor 夏剑辉廖维林雷志伟许招会汪德先
Owner JIANGXI NORMAL UNIV
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