| (19) |
 |
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(11) |
EP 0 539 126 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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16.06.1993 Bulletin 1993/24 |
| (43) |
Date of publication A2: |
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28.04.1993 Bulletin 1993/17 |
| (22) |
Date of filing: 16.10.1992 |
|
| (51) |
International Patent Classification (IPC)5: C10G 69/12 |
|
| (84) |
Designated Contracting States: |
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AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE |
| (30) |
Priority: |
21.10.1991 FI 914953
|
| (71) |
Applicant: NESTE OY |
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FIN-02150 Espoo (FI) |
|
| (72) |
Inventors: |
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- Raulo, Pirkko
SF-00950 Helsinki (FI)
- Keskinen, Kari M.
SF-04200 Kerava (FI)
- Myllyoja, Jukka
SF-00940 Helsinki (FI)
|
| (74) |
Representative: Goodanew, Martin Eric et al |
|
MATHISEN, MACARA & CO.
The Coach House
6-8 Swakeleys Road
Ickenham
Uxbridge UB10 8BZ
Ickenham
Uxbridge UB10 8BZ (GB) |
|
| |
|
| (54) |
Process for preparing a diesel fuel fraction by oligomerisation |
(57) The invention relates to a process for preparing a diesel oil fraction with a high
cetane number. According to the invention a charge containing light olefins is oligomerized
in the presence of a zeolite catalyst to prepare a product composition which at least
partially comprises C₈₊ hydrocarbons. The product composition thus obtained is hydrogenated
to form a diesel oil fraction. According to the invention the catalyst used comprises
a ZSM-5 zeolite catalyst, whose hydroogen ions have, at least partially been exchanged
for Ca²⁺ ions. By means of the invention it is possible to prepare diesel oil fraction
with a cetane number higher than 49.