| (19) |
 |
|
(11) |
EP 1 321 504 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
22.10.2003 Bulletin 2003/43 |
| (43) |
Date of publication A2: |
|
25.06.2003 Bulletin 2003/26 |
| (22) |
Date of filing: 18.12.2002 |
|
| (51) |
International Patent Classification (IPC)7: C10L 1/22 |
|
| (84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR |
|
Designated Extension States: |
|
AL LT LV MK RO |
| (30) |
Priority: |
18.12.2001 US 20411
|
| (71) |
Applicant: ETHYL CORPORATION |
|
Richmond, Virginia 23219-4304 (US) |
|
| (72) |
Inventor: |
|
- Henly, Timothy J.
Maidens, Virginia 23102 (US)
|
| (74) |
Representative: Cresswell, Thomas Anthony |
|
J.A. KEMP & CO. 14 South Square Gray's Inn
London WC1R 5JJ
London WC1R 5JJ (GB) |
|
| |
|
| (54) |
Extremely stable diesel fuel compositions |
(57) Diesel fuel compositions that are extremely stable against thermal degradation, sedimentation
and discolouration arc devoid or essentially devoid of certain heteroatomic compounds
often present in diesel fuel and which have been discovered to cause the thermal degradation
in the presence of nitrate-based cetane improver additives. The specific deleterious
heteroatomic compounds include pyrroles, indoles, sulfides, disulfides, mercaptans,
thioacids, sulfonic acids, and indolines.