Gas purification process

Details Gas purification process Gas purification process

B - Operations, Transporting

01

D

252/30, 23/346

B01D 53/14 (2006.01)

Patent

CA 1130986

3-11926/MA 1738/C Abstract of the disclosure Gas purification process The material containing hydrogen sulphide is washed with an aqueous alkaline solution containing one or more compounds having the general formula I Image (I), wherein A is a C1-C4 straight or branched chain alkylene radical, B is a -SO3M, -CO2M, -PO3HM or -PO3M2 grouping where M is hydrogen or a cation giving a water-soluble derivative, R is hydrogen, a cation giving a water-soluble derivative or C1-C4 straight or branched chain alkyl, R1 is hydrogen, methyl or -COOH and m is 0 or 1 the hydrogen sulphide-being oxidised and sulphur liberated, and the reduced anthra- quinone sulphonamide being oxidised by contact with free oxygen or a gas containing it. Optionally there is present in addition a compound of a metal having at least two valency states, and if necessary a chelating or sequestering agent for retaining such metal compounds in solution.

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