Production of pure magnesium chloride solution from siliceous ma

Details Production of pure magnesium chloride solution from siliceous ma Production of pure magnesium chloride solution from siliceous ma

1990-08-20

1992-02-25

Lewis, Michael

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

423164, 423167, 423497, C01F 530

Patent

active

050911619

ABSTRACT:
A process for the production of pure magnesium chloride liquor from siliceous magnesium minerals comprises the steps of continuously leaching the siliceous magnesium mineral with a hydrochloric acid solution at a temperature higher than 50.degree. C. but below the boiling point and in such a manner as to maintain the pH of the slurry below 1.5 to prevent the formation of silica gel, continuously reacting such slurry with a reactive magnesia in order to raise the pH to 4.0-7.0 to precipitate substantially all the impurities from solution while preventing silica gel formation, and performing a solid/liquid separation of the slurry on suitable filtration equipment to obtain pure magnesium chloride liquor.

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patent: 2549798 (1951-04-01), Gee et al.
patent: 3615181 (1971-10-01), Bauman
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patent: 4148862 (1979-04-01), Fugleberg et al.
patent: 4289736 (1981-09-01), Lalancette
Hydrogen Ions Their Determination and Importance in Pure and Industrial Chemistry, Britton Hubert T. S., 4th Ed., vol. II, D. Van Nostrand Co., Inc., 1986.

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