| abstract |
The present invention relates to a process for the catalytic oxidation of sulphide, mono- and/or dihydrogen sulphide, comprising the step of contacting the sulphide, mono- and/or dihydrogen sulphide in the presence of oxygen with a chelate complex comprising (i) a metal cation selected from the group consisting of Fez+, Mn z+ , Ni z* and Co z+ , where z = 2 or 3, and (ii) a chelate ligand containing a porphyrin, a phtha!ocyanine or a porphyrazine ring coordinated to the metal cation, and at least one cationic substituent covalentiy attached to the ring in the chelate ligand. |