Process for removing sulfur dioxide from a gas and producing sul

Details Process for removing sulfur dioxide from a gas and producing sul Process for removing sulfur dioxide from a gas and producing sul

1975-11-18

1977-07-19

Vertiz, O. R.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423242, 423356, 423541A, 423571R, 423570, 423571, 423574L, 423575, C01B 1702, C01B 102, C01B 1750

Patent

active

040369439

ABSTRACT:
A SO.sub.2 -containing gas is contacted with an ammonia solution, the resulting ammonium sulfite solution is vaporized to SO.sub.2 and NH.sub.3 , SO.sub.2 is partially reduced to H.sub.2 S and the resulting gas containing both SO.sub.2 and H.sub.2 S is first contacted with a catalyst to produce sulfur and then made free of sulfur by solvent washing; recovered NH.sub.3 is used to re-constitute the ammonia solution.

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patent: 3832454 (1974-08-01), Renault et al.
patent: 3833715 (1974-09-01), Deschamps et al.

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