Lube oil prodn - by two stage hydrotreatment and atmospheric - and reduced pressure distillationLube oils of good viscosimetric properties, suitable proportion of heteroatoms and a narrow distillation range are produced from a petroleum vacuum distillate and/or a deasphalted vacuum distillation residue...
High viscosity index lube oil prodn - by two-stage hydrotreatment of heavy oilsProcess comprises (a) catalytically hydrotreating the heavy hydrocarbons at 340-450 degrees C (maximising hydrogenation of fused ring aromatics, minimising crakcing); and then (b) further, catalytically hydrotreating at ...
High viscosity index lube oil prodn - by two-stage hydrotreatment of heavy oilsProcess comprises (a) catalytically hydrotreating the heavy hydrocarbons at 340-450 degrees C (maximising hydrogenation of fused ring aromatics, minimising crakcing); and then (b) further, catalytically hydrotreating at ...
High viscosity index lube oil prodn - by two-stage hydrotreatment of heavy oilsProcess comprises (a) catalytically hydrotreating the heavy hydrocarbons at 340-450 degrees C (maximising hydrogenation of fused ring aromatics, minimising crakcing); and then (b) further, catalytically hydrotreating at ...