To provide an improved flexible method for producing a base oil and a middle distillate by a hydroisomerization reformation accompanying a catalytic deparaffinization treatment, by which the base oil having a greatly high quality, namely a high viscosity index (VI), excellent UV stability and a low pour point is produced from a charged hydrocarbon.
This method for producing a base oil from a charged hydrocarbon comprises the following continuous processes: (a) simultaneously subjecting the charged hydrocarbon and at least a part of n-paraffins contained in the hydrocarbon to a hydroisomerization reformation, wherein the charged hydrocarbon has a sulfur content of <1,000 wt.ppm, a nitrogen content of <200 wt.ppm, a metal content of <50 wt.ppm and an oxygen content of <0.2 wt.%, and wherein the process is carried out at a specific temperature, at a specific pressure and at at a specific space velocity in the presence of hydrogen and a specific catalyst, and (b) subjecting at least a part of the effluent produced in the process (a) to a catalytic deparaffinization treatment at a specific temperature at a specific pressure and at a specific space velocity in the presence of hydrogen and a specific catalyst.
MARCHAL-GEORGE NATHALIE
CSERI TIVADAR
MARION PIERRE
GUERET CHRISTOPHE
| JPH09221685A | 1997-08-26 | |||
| JPH08511302A | 1996-11-26 |