| (19) |
 |
|
(11) |
EP 0 744 452 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
22.01.1997 Bulletin 1997/04 |
| (43) |
Date of publication A2: |
|
27.11.1996 Bulletin 1996/48 |
| (22) |
Date of filing: 26.04.1996 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT NL |
| (30) |
Priority: |
28.04.1995 EP 95400991
|
| (71) |
Applicant: SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V. |
|
2596 HR Den Haag (NL) |
|
| (72) |
Inventors: |
|
- Rivoalen, Philippe Marie
Bd Maritime, 76530 Petit Couronne (FR)
- Scheffer, Bob
1031 CM Amsterdam (NL)
- Wardle, Peter James
2596 HR The Hague (NL)
|
|
| |
|
| (54) |
Process for producing lubricating base oils |
(57) Process for producing lubricating base oils, which process comprises the steps of:
(a) contacting a hydrowax obtained as the bottom fraction of a hydrocracked effluent
with a catalyst comprising platinum and/or palladium on a refractory oxide carrier
in the presence of hydrogen under such conditions that at least 10% by weight, preferably
at least 25% by weight, of the hydrocarbons having a boiling point of 370 °C or higher,
which are present in the hydrowax, is converted into hydrocarbons having a lower boiling
point,
(b) separating the product obtained in step (a) in at least one lighter distillate
fraction and a heavy distillate fraction having a VI of 125 or higher, preferably
of 135 or higher, and a kinematic viscosity at 100 °C of a least 3.5 centiStokes,
and
(c) dewaxing the heavy distillate fraction obtained in step (b).