Apparatus and method for the production of active magnesium hydroxide
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United States of America Patent
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Sep 2, 1997
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N/A
app pub date -
Oct 29, 1993
filing date -
Oct 29, 1992
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Expired
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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.
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