EP 1357167 A1 20031029 - Process for production of high quality gasoline with low aromatic content
Title (en)
Process for production of high quality gasoline with low aromatic content
Title (de)
Verfahren zur Herstellung von Benzin hoher Qualität mit niedrigem Aromatengehalt
Title (fr)
Procédé pour la production d'essence de haute qualité à faible teneur en aromatiques
Publication
Application
Priority
DK PA200200576 A 20020418
Abstract (en)
A two-stage process for production of high-octane gasoline from a hydrocarbon stream comprising C4-C12 hydrocarbon mixtures of paraffins, optionally including cycloalkanes, aromatics and olefins is disclosed. During the first step linear molecules are activated and converted predominantly to mono-branched isomers. Present cyclic molecules and olefins are hydrogenated, but conversion must be sufficiently low to avoid ring opening. Only such (low) amount of multi-branched isomers is formed in the first reaction zone that extent of cracking is still acceptable. Concentration of multi-branched isomers is consecutively increased in the second step. Reaction of mono-branched isomers requires lower activation energy than cracking and isomerisation of linear molecules. Monomethyl-paraffins readily react to their multi-branched counterparts with a high selectivity under mild reaction conditions with catalysts having a Hammet acidity value lower than -10 at temperature of maximum 100 DEG C and at least 50 DEG C lower than in the first step. These conditions effectively isomerise hydrocarbon molecules containing tertiary carbon, while other feed components are little effected. The combination of both steps utilising different catalysts and conditions is essential to achieve a high selectivity. Both reaction steps can be combined with separation of low octane number paraffin molecules by a suitable separation process. <IMAGE>
IPC 1-7
IPC 8 full level
B01J 23/652 (2006.01); C10G 17/06 (2006.01); C10G 17/07 (2006.01); C10G 17/095 (2006.01); C10G 35/06 (2006.01); C10G 35/095 (2006.01); C10G 45/54 (2006.01); C10G 59/00 (2006.01); C10G 59/02 (2006.01); C10G 65/04 (2006.01)
CPC (source: EP US)
C10G 59/02 (2013.01 - EP US); C10G 2400/02 (2013.01 - EP US)
Citation (search report)
- [DA] EP 0653400 A1 19950517 - SHELL INT RESEARCH [NL]
- [A] US 5719097 A 19980217 - CHANG CLARENCE D [US], et al
- [A] EP 1172348 A1 20020116 - HALDOR TOPSOE AS [DK]
- [A] GB 567875 A 19450307 - SHELL DEV
- [A] FR 2566794 A1 19860103 - EL PASO PRODUCTS CO [US]
- [E] EP 1310472 A1 20030514 - HALDOR TOPSOE AS [DK]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1357167 A1 20031029; JP 2003327972 A 20031119; US 2003196931 A1 20031023
DOCDB simple family (application)
EP 03006545 A 20030324; JP 2003114687 A 20030418; US 40298403 A 20030401