| (19) |
 |
|
(11) |
EP 0 712 922 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
23.10.1996 Bulletin 1996/43 |
| (43) |
Date of publication A2: |
|
22.05.1996 Bulletin 1996/21 |
| (22) |
Date of filing: 15.11.1995 |
|
|
| (84) |
Designated Contracting States: |
|
BE DE FR GB IT NL |
| (30) |
Priority: |
16.11.1994 EP 94402602
|
| (71) |
Applicant: SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V. |
|
NL-2596 HR Den Haag (NL) |
|
| (72) |
Inventors: |
|
- Dagorn, Daniel N.N.,
c/o Shell Recherche S.A.
F-76530 Grand Couronne (FR)
- Mahtout Grandvallet, Taous,
c/o Shell Recherche S.
F-76530 Grand Couronne (FR)
- Grandvallet, Pierre,
c/o Shell Recherche S.A.
F-76530 Grand Couronne (FR)
- Scheffer, Bob
NL-1031 CM Amsterdam (NL)
|
|
| |
|
| (54) |
Process for improving lubricating base oil quality |
(57) Process for improving the quality of lubricating base oils, which process comprises
contacting a lubricating base oil with dry activated carbon.