| 摘要 |
Process for purifying gaseous or liquid effluents containing sulphur-containing derivatives (H2S, alkyl mercaptans, SO2). This process comprises: (i) basification of the effluent to be treated at a pH >9 in the presence of a base of general formula M-OH, in which M represents an alkali metal, an alkaline-earth metal, an agent for condensation between the organic part of the compound of formula I below and the sulphur-containing derivative or a phase transfer agent and especially a quaternary ammonium or a ligand; (ii) placing of the product obtained in (i) in contact with a compound of general formula I: X-(CH2)n-CO-R, in which: X represents: a halogen, a sulphonyl halide of formula X'-SO2-R', in which X' represents a halogen and R' represents a C1-C20 alkyl group or an optionally substituted aryl group, an OH group; R represents: a C1-C16 alkoxy, a group NH-R'', in which R'' represents a hydrogen atom or a primary or secondary amine radical, a group OR2 in which R2 represents a hydrogen atom, an alkali metal, an alkaline-earth metal or an ammonium group, or a halogen; n is an integer between 1 and 4, at a temperature between 12 DEG C. and 95 DEG C. and at atmospheric pressure.
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