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

1976-09-24

1980-06-03

Peters, G. O.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423226, 423227, C01B 1704

Patent

active

042061946

ABSTRACT:
A process for treating a hydrogen sulfide-containing hydrogenated Claus process tail gas to convert the hydrogen sulfide to elemental sulfur in which said gas is contacted with an aqueous alkaline solution containing a water-soluble metal vanadate, a water-soluble anthraquinone disulfonate, and a water-soluble phenolic complexing agent or a water-soluble carboxylic complexing agent, to yield an effluent gas of reduced sulfur content. 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. The complexing agent contained in the solution reduces the chemical consumption of the anthraquinone disulfonate.

REFERENCES:
patent: 1792097 (1931-02-01), Jacobson
patent: 3642448 (1972-02-01), Beavon
patent: 3928535 (1975-12-01), Schulz

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