| 摘要 |
Five and 6C components of a 5C and higher boiling feed stream (I) are upgraded into higher octane components by (a) passing (I) to a fractionating zone; (b) withdrawing from the zone a relatively heavy stream (II) comprising 7C+ hydrocarbons, an intermediate stream (III) rich in normal hexane and lower boiling range hydrocarbons, and a relatively light stream comprising 6C isoparaffins and lower boiling hydrocarbons; (c) contacting stream (III) with an isomerisation catalyst under isomerisation conditions; (d) returning at least part of the isomerisation effluent as recycle to the fractionation; and (e) opt. contacting stream (II) with a reforming catalyst to form a reformed prod. stream.
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