Process for purifying industrial gases containing hydrogen sulfi

Details Process for purifying industrial gases containing hydrogen sulfi Process for purifying industrial gases containing hydrogen sulfi

1973-11-19

1976-06-08

Vertiz, Oscar R.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423232, 423423, 423428, 423563, C01B 1704, C01D 702

Patent

active

039624102

ABSTRACT:
Process for purifying industrial gases containing hydrogen sulfide and for simultaneously producing elemental sulfur, comprising contacting said gases with an aqueous solution of sodium hydroxide and/or sodium carbonate, thereby forming a sodium sulfide solution, contacting said solution with an aqueous solution of ammonium hydrogen carbonate or with a gaseous mixture of CO.sub.2 and NH.sub.3 so as to precipitate sodium hydrogen carbonate, decomposing the latter to CO.sub.2 and neutral sodium carbonate which is recycled, heating the resulting liquid phase to produce NH.sub.3 and H.sub.2 S and producing sulfur by reacting the H.sub.2 S with sulfurous anhydride.

REFERENCES:
patent: 1440977 (1971-02-01), Espenhahn
patent: 3561925 (1971-02-01), Deschamps et al.
patent: 3598529 (1971-08-01), Deschamps et al.
patent: 3796796 (1974-03-01), Deschamps et al.
patent: 3846539 (1974-11-01), Renault et al.

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