Process for converting normal and cyclic paraffins
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United States of America Patent
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May 30, 1989
Grant Date -
N/A
app pub date -
Mar 31, 1988
filing date -
Mar 31, 1988
priority date (Note) -
Expired
status (Latency Note)
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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.
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