This invention provides catalysts for the oxidation of hydrogen sulfide. In
particular, the invention provides catalysts for the partial oxidation of
hydrogen sulfide to elemental sulfur and water. The catalytically active
component of the catalyst comprises a mixture of metal oxides containing
titanium oxide and one or more metal oxides which can be selected from the
group of metal oxides or mixtures of metal oxides of transition metals or
lanthanide metals. Preferred metal oxides for combination with TiO.sub.2
in the catalysts of this invention include oxides of V, Cr, Mn, Fe, Co,
Ni, Cu, Nb, Mo, Tc, Ru, Rh, Hf, Ta, W, Au, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd,
Tb, Dy, Ho, Er, Tm, Yb, and Lu. Catalysts which comprise a homogeneous
mixture of titanium oxide and niobium (Nb) oxide are also provided. A
preferred method for preparing the precursor homogenous mixture of metal
hydroxides is by coprecipitation of titanium hydroxide with one or more
other selected metal hydroxides. Catalysts of this invention have improved
activity and/or selectivity for elemental sulfur production. Further
improvements of activity and/or selectivity can be obtained by introducing
relatively low amounts (up to about 5 mol %)of a promoter metal oxide
(preferably of metals other than titanium and that of the selected second
metal oxide) into the homogeneous metal/titanium oxide catalysts of this
invention.