| (19) |
 |
|
(11) |
EP 0 776 959 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
11.03.1998 Bulletin 1998/11 |
| (43) |
Date of publication A2: |
|
04.06.1997 Bulletin 1997/23 |
| (22) |
Date of filing: 28.11.1996 |
|
| (51) |
International Patent Classification (IPC)6: C10G 65/04 |
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT NL |
| (30) |
Priority: |
28.11.1995 EP 95402713
|
| (71) |
Applicant: SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V. |
|
2596 HR Den Haag (NL) |
|
| (72) |
Inventors: |
|
- Bertaux, Jean-Marie Alexandre
76530 Grand Couronne (FR)
- Germaine, Gilbert Robert Bernard
76530 Grand Couronne (FR)
- Janssen, Martinus Maria Petrus
76530 Grand Couronne (FR)
- Hoek, Arend
1031 CM Amsterdam (NL)
|
|
| |
|
| (54) |
Process for producing lubricating base oils |
(57) Process for the preparation of lubricating base oils having a VI of at least 150
from a Fischer-Tropsch wax feed, which process comprises the steps of:
(a) contacting the Fischer-Tropsch wax feed with a hydroconversion catalyst under
hydroconversion conditions,
(b) separating the hydroconverted effluent obtained in step (a) into at least one
lighter fraction and a heavy fraction, and
(c) dewaxing the heavy fraction to yield the base oil,
wherein the Fischer-Tropsch wax feed has a congealing point of at least 50 °C and
has such boiling range that the difference between the 90 %wt boiling point and the
10 %wt boiling point (T
90-T
10) is in the range of from 40 to 150 °C.