Properties of Manganese Chloride Tetrahydrate

2022-07-21

Pale pink monoclinic translucent crystal. There is deliquescence. Its crystals have two forms, a and p. The a-type is a monoclinic columnar crystal, which is relatively stable; the p-type is a monoclinic plate-shaped crystal, which is unstable. Melting point 58°C; d 2.01. Soluble in 0.7 part of water, soluble in ethanol, insoluble in ether. It is absorbent and easy to deliquescence. At 106 °C, one molecule of crystal water is lost, and at 200 °C, all crystal water is lost to form anhydrous. When the anhydrous is heated in the air, it is decomposed by water and releases HCI to generate Mn 04.

Manufacturing Method
The crushed magnesite is reacted with excess hydrochloric acid in the reactor, after the reaction is completed, the excess remaining hydrochloric acid is neutralized with lime, and the pH value is controlled to be about 4, and then hydrogen Peroxide is added to remove iron. Then, manganese Sulfate is added to the solution to remove calcium, and the purified solution is evaporated, filtered, evaporated and concentrated, cooled for crystallization, and centrifuged.

Use

Analytical reagents for microanalysis of gallium and periodate. It can also be used as a catalyst for organic chlorination, a raw material for gasoline anti-vibration agents and a drier for paints. It is also used in the manufacture of chemical fertilizers, feed additives, dyes and pigments, aluminum alloy smelting, brown-black brick and tile production, and pharmaceutical and battery industries.

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Manganese Chloride Tetrahydrate

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