Method of preparing Na.sub.2 S (II)

Details Method of preparing Na.sub.2 S (II) Method of preparing Na.sub.2 S (II)

1990-04-19

1991-12-24

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Binary compound

423562, C01B 1722

Patent

active

050750984

ABSTRACT:
A method of preparing sodium monosulfide by means of reacting a sodium polysulfide with sodium under protective gas, the sodium polysulfide is placed in a first stage in a finely distributed, solid state in a receiver, preheated to temperatures of 100.degree.-150.degree. C., liquid sodium is gradually added in the required amount to the material in the receiver under intensive mixing, whereby the temperature of the reaction mixture is maintained at 120.degree.-250.degree. C. and in a second stage the formed initial product is allowed to continue to react, or postreact under continuation of the mixing at 250.degree.-480.degree. C., until a Na.sub.2 S content of at least 95% by weight has been attained.

REFERENCES:
patent: 4640832 (1987-02-01), Bittner et al.
Handbook of Chemistry and Physics, 63rd ed., 1982-1983, Chemical Rubber Company Press--Boca Raton, Florida, p. B-151.

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