Reducing the consumption of anthraquinone disulfonate in Stretfo

Details Reducing the consumption of anthraquinone disulfonate in Stretfo Reducing the consumption of anthraquinone disulfonate in Stretfo

1975-08-12

1977-04-12

Peters, G. O.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423236, 423571, C01B 1704

Patent

active

040175944

ABSTRACT:
A process for treating a hydrogen sulfide-containing feed gas, deficient in thiocyanate ion precursors, to convert the hydrogen sulfide to elemental sulfur in which said gas is contacted with an aqueous alkaline washing solution containing a water-soluble metal vanadate, and a water-soluble anthraquinone disulfonate to yield an effluent gas of reduced sulfur content. Thiocyanate ion precursors are added to the solution to reduce the chemical consumption of the anthraquinone disulfonate. The solution is thereafter regenerated by contact with an oxygen-containing gas; elemental sulfur is recovered from the solution; and the regenerated solution is recycled to the gas-contacting step.

REFERENCES:
patent: 3904734 (1975-09-01), Gosden et al.

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