| (19) |
 |
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(11) |
EP 0 321 304 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
30.08.1989 Bulletin 1989/35 |
| (43) |
Date of publication A2: |
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21.06.1989 Bulletin 1989/25 |
| (22) |
Date of filing: 16.12.1988 |
|
| (51) |
International Patent Classification (IPC)4: C10G 45/68 |
|
| (84) |
Designated Contracting States: |
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BE DE ES FR GB IT NL |
| (30) |
Priority: |
18.12.1987 US 134998
|
| (71) |
Applicant: EXXON RESEARCH AND ENGINEERING COMPANY |
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Florham Park,
New Jersey 07932-0390 (US) |
|
| (72) |
Inventor: |
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- Boucher, Heather Alexis
Point Edward
Ontario N7T 7W4 (CA)
|
| (74) |
Representative: Somers, Harold Arnold et al |
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ESSO Engineering (Europe) Ltd.
Patents & Licences
Mailpoint 72
Esso House
Ermyn Way
Leatherhead,
Surrey KT22 8XE
Leatherhead,
Surrey KT22 8XE (GB) |
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| |
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| (54) |
Method of improving lube oil yield by wax isomerization employing low treat gas rates |
(57) Increased yields of 5.6-5.9 cSt (5.6 to 5.9 Mm²/s)/100°C lube oil are obtained in
wax isomerization processes by utilizing low treat gas rates during the wax isomerization
step. The isomerate boiling in the lube oil range obtained by using low treat gas
rates during isomerization possess lower dry wax content in addition to possessing
a higher fraction of 5.6-5.9 cSt (5.6 to 5.9 Mm²/s)/100°C oil.