C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/713.1
C07C 5/27 (2006.01) C07C 9/15 (2006.01)
Patent
CA 1301201
"C5 C6 PARAFFIN ISOMERIZATION PROCESS USING AN INTEGRATED FEED AND PRODUCT FRACTIONATION ZONE" ABSTRACT A combination isomerization-fractionation process provides additional liquid volume yields of a high octane C5 and C6 isomerization product stream without significant increase in utilities expense by recycling the isomerization zone effluent stream to an extended feed fractionation zone from which the isomerization zone feed stream as well as the isomerization product stream is also withdrawn. The feed fractionation zone typically receives a C5-plus boiling range naphtha feed. The fractionation zone typically provides a relatively heavy bottoms stream for a reformer feed and a relatively lighter sidecut stream for feed to the isomerization zone. Effluent from the isomerization zone is recycled to the feed fractionation zone at a mid- fractionation entry point. A net overhead stream withdrawn from the feed fractionation zone and containing principally C6 isoparaffins and lighter boiling hydrocarbons provides a ralatively high octane blending component. The fractionation zone overhead stream may be combined with effluent from a reforming zone which operates on the relatively heavy bottom stream to obtain a gasoline product, at high liquid volume yield, having sufficient octane for unleaded motor fuel use.
564499
Macrae & Co.
Uop Inc.
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