Patent ID: 6051127
Filing Date: 2000-04-18
Classification: C10G

Abstract:
A process for the preparation of lubricating oils comprising the steps of:a) contacting a hydrocarbon oil feed in the presence of hydrogen in a first reaction zone with a catalyst comprising at least one Group VIB metal component and at least one non-noble Group VIII metal component supported on a refractory inorganic oxide carrier incorporating fluorinated alumina and dealuminated zeolites at conditions in said first reaction zone effective to produce a liquid fraction having a sulfur content of less than 1000 ppmw and a nitrogen content of less than 50 ppmw;b) separating the effluent at elevated pressure into a gaseous fraction and a liquid fraction having said sulfur content of less than 1000 ppmw and said nitrogen content of less than 50 ppmw;c) contacting the liquid fraction in the presence of hydrogen in a second reaction zone with at least a catalyst comprising a noble metal component supported on an amorphous refractory oxide carrier; andd) recovering lubricating base oil having a viscosity index of at least 80.