Production of aromatics-rich gasoline with low benzene content

Details Production of aromatics-rich gasoline with low benzene content Production of aromatics-rich gasoline with low benzene content

1989-08-24

1990-12-04

Myers, Helane E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208 62, 208135, 208133, 585323, 585467, C10G 3900

Patent

active

049751794

ABSTRACT:
A process is disclosed for the production of high octane gasoline rich in aromatics but containing a relatively low concentration of benzene. The process comprises the separation of C.sub.6 fraction of the gasoline feedstock into n-hexane and C.sub.6 isomers. The n-hexane and C.sub.7 + streams are catalytically reformed to produce a reformate with a diminished yield of benzene. The reformate is separated and the C.sub.6 - reformate fraction containing benzene is alkylated employing acidic metallosilicate catalyst such as ZSM-5 as the catalyst and preferably methano or propylene as the alkylating agent. The alkylate comprises C.sub.7+ alkylaromatics. The C.sub.6 isomers are blended into the gasoline pool.

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