Apparatus and method for the production of active magnesium hydr

Details Apparatus and method for the production of active magnesium hydr Apparatus and method for the production of active magnesium hydr

1993-10-29

1997-09-02

Lewis, Michael

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C01F 516

Patent

active

056628811

ABSTRACT:
Coarse light burned magnesia is comminuted in the wet state with a wet-pulverizer and hydrated in the presence of an alkaline aqueous medium at an elevated temperature of not less than 70.degree. C., the resultant pulverizate is classified into fine and coarse particles using a classifying means, and the coarse particles are recycled to the wet-pulverizer. By subjecting light burned magnesia to concurrent wet-pulverization and hydration in the presence of a heated alkaline aqueous medium, the material magnesia can be simultaneously comminuted and hydrated under rapid heating. Therefore, from light burned magnesia, an active magnesium hydroxide showing a low viscosity even at a high concentration can be efficiently produced at a high rate in a fewer step.

REFERENCES:
patent: 3836627 (1974-09-01), Wiensz
Patent Abstract of Japan, vol. 13, No. 208 (C-596) (3556) May 1989 re JP-A 1028214.
Patent Abstract of Japan, vol. 900 No. 219 (DW9013) Aug. 1988 re JP-A 2048414.
Patent Abstract of Japan, vol. 891 No. 128 (DW9002) Jan. 1988 re JP-A 1294520.

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