Process for treating sulfide-containing materials

Details Process for treating sulfide-containing materials Process for treating sulfide-containing materials

1973-01-15

1976-03-16

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 69, 423164, 423563, 423638, C01F 1110

Patent

active

039444864

ABSTRACT:
A process for recovering the calcium values and sulfide values from a calcium sulfide-containing material is disclosed. The calcium sulfide-containing material dispersed in an aqueous medium is digested in the presence of hydrogen sulfide under conditions to provide a mole ratio of S.sup.-.sup.-/Ca.sup.+.sup.+ of between 1.5 and 2.0. After filtration to remove undissolved solids, the mother liquor is stripped with an inert gaseous medium, e.g. nitrogen, steam, etc., whereby hydrogen sulfide is stripped therefrom with the concomitant formation of calcium hydroxide which is subsequently separated by filtration. The gaseous overhead from the stripping operations may be fractionated to form a recycleable hydrogen sulfide-containing stream.

REFERENCES:
patent: 1580452 (1926-04-01), Sperr
patent: 2118353 (1938-05-01), MacIntire
patent: 2374632 (1945-04-01), Walker
patent: 2709126 (1955-05-01), Gollmar
patent: 3625164 (1971-12-01), Spector

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