A process is described for the catalytic removal of H2S gas from a
sour
gas stream in the presence of a chelate ligand of the formula (I)
##STR1##
- where:
- X is hydrogen, an alkali metal or NH4+,
- n is 1, 2 or 3, and
- at least one of the radicals R1 to R6 is alkyl,
aryl, alkyloxy, aryloxy, carboxyl or hydroxyl, the remaining radicals being hydrogen, and
- the metal in the metal chelate complex is a polyvalent metal, which
can occur in more than one oxidation state.
A mixture is also described for removing H2S gas from a sour gas stream,
the mixture comprising an aminocarboxylate-containing metal chelate complex, and
the use is also described of an aminocarboxylate-containing metal chelate complex
for removing H2S gas from a sour gas stream.
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