Process for the manufacture of caustic soda

Details Process for the manufacture of caustic soda Process for the manufacture of caustic soda

1986-08-09

1986-12-02

Doll, John

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423432, C01F 524

Patent

active

046264264

ABSTRACT:
There is provided a process for preparing caustic soda solutions from naturally occurring alkaline minerals comprising double salts of sodium carbonate and calcium carbonate. The process comprises heating said naturally occurring alkaline minerals to temperatures sufficient to dehydrate and partially decarbonate said alkaline minerals and provide an intermediate product of a mixture of sodium carbonate and calcium oxide. This intermediate then is contacted with water to effect causticization of the sodium carbonate and provide a recoverable phase comprising an aqueous solution of caustic soda.

REFERENCES:
patent: 1500995 (1924-07-01), Jones
patent: 2802719 (1957-08-01), Avedikian
patent: 2979380 (1961-04-01), Miller
patent: 3268388 (1966-08-01), Bauman et al.
patent: 3920800 (1975-11-01), Harris
patent: 4451443 (1984-05-01), Libby
Kirk-Othmer Encyclopedia of Technology, vol. 1, pp. 740-748 (1964).
K. V. Tkacher, P. S. Remple and I. I. Strezhneva, Ch. Neorg. Khim, 1968, 12(12), pp. 3179-3181 (Chem. Abstracts, p. 141, vol. 70, 1979).

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