The Collaborative International Dictionary of English v.0.48:

Sulphuration \Sul`phu*ra"tion\, n. [Cf. F. sulfuration, L.
   sulphuratio, sulfuratio, a vein of sulphur.]
   The act or process of combining or impregnating with sulphur
   or its compounds; also, the state of being so combined or
   impregnated.
   [1913 Webster]