GB728755A - Improvements relating to the catalytic desulphurisation of benzole and motor fuels containing same - Google Patents

Abstract

Benzole or motor fuel consisting of a mixture of benzole and straight-run petroleum gasoline is catalytically desulphurized by passing in vapour form, in admixture with hydrogen, over a dehydrogenation-hydrogenation catalyst, at a temperature and pressure such that the dehydrogenation of naphthenes in the benzole or fuel is effected to an extent not in excess of that required to produce sufficient hydrogen to convert the organically combined sulphur in the benzole or fuel into hydrogen sulphide and to maintain the vapour phase in the reaction zone. A hydrogen-rich gas is separated from the treated feedstock and recycled to the reaction zone as the sole source of hydrogen thereto. The process may be carried out at a temperature of 780-800 DEG F. and a pressure of 100 p.s.i. using cobalt and molybdenum oxides on alumina as catalyst. Specifications 654,152, 663,038, 669,536, 669,551, 669,552, 669,553 and 697,083, [all in Group III], are referred to.ALSO:Benzole or motor fuel consisting of a mixture of benzole and straight-run petroleum gasoline is catalytically desuphurized by passing in vapour form, in admixture with hydrogen, over a dehydrogenation-hydrogenation catalyst, at a temperature and pressure such that the dehydrogenation of naphthenes in the benzole or fuel is effected to an extent not in excess of that required to produce sufficient hydrogen to convert the organically combined sulphur in the benzole or fuel into hydrogen sulphide and to maintain the vapour phase in the reaction zone. A hydrogen-rich gas is separated from the treated feedstock and recycled to the reaction zone as the sole source of hydrogen thereto. The process may be carried out at a temperature of 750-800 DEG F. and a pressure of 100 p.s.i. using cobalt and molybdenum oxides or alumina as catalyst. Specifications 654,152, 663,038, 669,536, 669,551, 669,552, 669,553 and 697,083 are referred to.