Fina Research, S.a.

Eric Jgm Romers

Jacques F Grootjans

Christian Lamotte

Pierre Belloir

Pierre-Frederic J Belloir

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.

Process for the production of high octane number gasolines

Silicalite to be used as catalyst in the isomerization of olefins is pretreated by passing steam thereon at a temperature of 300 to 750.degree. C. Particularly, isobutene is selectively produced by isomerization of n-butenes.

Process for the isomerization of olefins

A improved process is provided for the alkylation of aromatic compounds under at least partial liquid phase conditions, and in the presence of a zeolite-type alkylation/transalkylation catalyst. In accordance with the present process, a diluted aromatic hydrocarbon feedstock containing C.sub.5 -C.sub.7 olefins is brought into contact with a diluted olefinic feedstream in the presence of the alkylation/transalkylation catalyst. Prior to contact with the olefinic feedstream, C.sub.5 -C.sub.7 olefins present in the aromatic hydrocarbon feedstock are selectively hydrogenated.

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Kraainem, Belgium

Eric Jgm Romers