Method for purifying hydrogen sulfide-containing gas

Details Method for purifying hydrogen sulfide-containing gas Method for purifying hydrogen sulfide-containing gas

1974-01-25

1976-01-13

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Carbon dioxide or hydrogen sulfide component

423521, 423551, 423571, 423577, C01B 1716

Patent

active

039325849

ABSTRACT:
Hydrogen sulfide-containing waste gases whose complete treatment is indispensable from the viewpoint of environmental pollution problem, are purified in two steps consisting of a first step in which the gases are absorbed in an aqueous solution of sodium hydroxide or/and sodium sulfide, and a second step in which sulfuric acid and sulfur dioxide gas are simultaneously introduced into the resulting solution after absorption to deposit sulfur. Further, for recovery of the resulting sulfur, a particular apparatus is provided.

REFERENCES:
patent: 3471249 (1969-10-01), Markant et al.
patent: 3672836 (1972-06-01), Brown
patent: 3718732 (1973-02-01), Winslow, Jr. et al.
patent: 3784680 (1974-01-01), Strong et al.
patent: 3801698 (1974-04-01), Lowrance et al.

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