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

1975-05-21

1977-11-29

Thomas, Earl C.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423226, 423471, B01D 5334, C01B 1704

Patent

active

040605949

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, inorganic fluoride, borate, or phosphate 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: 2997439 (1961-08-01), Nicklin et al.
patent: 3752877 (1973-08-01), Beavon
patent: 3928535 (1975-12-01), Schulz
patent: 3933993 (1976-01-01), Salemmc
Smith, "The Sequestration of Metals", Chapman and Hall, Ltd., 1959, pp. 106-109 & 113.

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