Production of magnesium oxide from magnesium silicates by basic

Details Production of magnesium oxide from magnesium silicates by basic Production of magnesium oxide from magnesium silicates by basic

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.

REFERENCES:
patent: 1388285 (1921-08-01), Moore
patent: 2243044 (1941-05-01), Westby
patent: 2549798 (1951-04-01), Gee et al.
patent: 2783129 (1957-02-01), Baral
patent: 2988423 (1961-06-01), McDaniel
patent: 3203755 (1965-08-01), Rathmell
patent: 3346335 (1967-10-01), Schnurch et al.
patent: 4029736 (1977-06-01), Melkonian

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