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US 6,281,398 B1Granted
Process for the production of high octane number gasolines
AssigneeFina Research, S.A.
InventorsPierre Belloir, Eric Romers, Christian Lamotte, Jacques Grootjans
Life of this patent
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Abstract
A process is disclosed for improving the yield in the production of high octane gasoline after naphtha reforming by utilizing a transalkylation step to upgrade the heavy and light fractions coming from the reforming step.
Claims8
A process for increasing the yield in high octane gasoline consisting of the steps of:
- (a) submitting a naptha feed to catalytic reforming in a catalytic reformer by contacting said feed with a catalytic reforming catalyst in order to form a reformed effluent consisting of light, intermediate and heavy fractions, the light fraction being rich in benzene;
- (b) separating said three factions in a separator into which the reformed effluent is directly introduced from the catalytic reformer, and recovering the intermediate fraction;
- (c) mixing the total amount of the light fraction rich in benzene from said separator with the total amount of the heavy fraction to form a mixture;
- (d) subjecting said mixture to a transalkylation system to form a second mixture having an increased intermediate fraction;
- and,
- (e) recycling the effluent coming from said transalkylation system into said separator and recovering additional intermediate fractions.
3 more elements
The process of any of the preceding claims characterized in that the transalkylation step is performed in the presence of a transalkylation catalyst selected from molecular sieves with large pores having a constraint index lower than about 1.
Dependencies are inferred from the claim text.