Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Alkaline earth metal
Patent
1983-02-17
1984-10-23
Doll, John
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Alkaline earth metal
423167, 423332, 423636, C01F 500
Patent
active
044787960
ABSTRACT:
There is provided a process for replacing the magnesium oxide portion of a nature magnesium silicate with sodium oxide thereby to form sodium silicate which comprises melting a natural magnesium silicate and sodium carbonate at a temperature of from 1100.degree. to 1350.degree. C. until a clear melt is obtained, the molar ratio of sodium oxide derived from the sodium carbonate per mole of silica contained in the natural magnesium silicate being from 4:1 to 7:1, quenching and extracting said clear melt with water and separating the insoluble magnesium oxide from the solution containing predominantly sodium silicate and sodium hydroxide.
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patent: 2988423 (1961-06-01), McDaniel
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patent: 4029736 (1977-06-01), Melkonian
Drolet Jean P.
Lalancette Jean M.
Doll John
Langel Wayne A.
Societe Nationale de Liamiante
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