Gas purification liquors

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component

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423236, 423573R, C01B 1704

Patent

active

040988864

ABSTRACT:
Thiosulphate ions present in gas purification liquors, particularly those employed for removing H.sub.2 S by washing with aqueous alkaline solutions of vanadium compounds and anthraquinone disulphonic acids, are decomposed to sulphide and hydroxyl ions by exposing the liquor to a hydrogen rich gas at elevated temperature e.g., 650.degree. C. The liquor may be evaporated and the solid residue subjected to decomposition. Any thiocyanate ions are hydrolyzed; it being necessary to mix steam with the hydrogen rich gas if a solid residue is being decomposed.

REFERENCES:
patent: 1636106 (1927-07-01), Naef
patent: 1971779 (1934-08-01), Gollmar
patent: 3558272 (1971-01-01), Urban
patent: 3642448 (1971-01-01), Beavon
patent: 3887682 (1975-06-01), Kumata et al.
Mellor, J. W., "A Comprehensive Treatise on Inorganic and Theoretical Chemistry", Longmans, Green & Co.; Lond, 1940, vol. X, p. 494.
Sneed et al., "Comprehensive Inorganic Chemistry", vol. 6, D. Van Nostrand Co.; N. Y. 1957, p. 167.

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