Process for converting normal and cyclic paraffins

Details Process for converting normal and cyclic paraffins Process for converting normal and cyclic paraffins

1988-03-31

1989-05-30

Caldarola, Glenn

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208 66, 208 79, 585737, C10G 3504

Patent

active

048348660

ABSTRACT:
A process for splitting a feed containing C.sub.6 cycloparaffins, C.sub.6 normal paraffins, and higher boiling hydrocarbons uses an isomerization zone to open the rings of cyclic hydrocarbons and a single fractionation zone to separate the feed and the isomerization product into a C.sub.7 plus stream that can be used as a feed stream to a reformer and an isoparaffin stream consisting of C.sub.6 and lighter hydrocarbons that is deficient in cyclic hydrocarbons. The process uses a chlorided platinum-alumina catalyst to open rings and isomerize C.sub.6 hydrocarbons. Additional feed streams of normal C.sub.5 paraffins may be added to the process ahead of the isomerization zone to increase the yield of isoparaffin from the isomerization zone. This process offers a simple flow scheme that yields a high volume of high octane isomerate while reducing the quantity of C.sub.6 cyclic hydrocarbons in a reformer feed. Converting the C.sub.6 cyclic hydrocarbons to isoparaffins will reduce the benzene yield from the reformer feed while also increasing the combined liquid volume yield of the feed.

REFERENCES:
patent: 3250816 (1986-05-01), Waldby
patent: 4457832 (1984-07-01), Robinson
patent: 4747933 (1988-05-01), Hibbs

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