Patent ID: 11932597
Assignee: LUMMUS TECHNOLOGY LLC
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  Y | IPC C

Claim 8:
9. A process for converting isobutane to propylene, the process comprising:
dehydrogenating an isobutane-containing stream to produce a mixed product stream comprising isobutane and isobutene;
skeletal isomerizing the mixed product stream comprising isobutane and isobutene to convert isobutene to n-butenes including 1-butene and 2-butenes to recover a skeletal isomerization reaction product comprising isobutane, isobutene, butadiene, 1-butene, and 2-butenes;
concurrently:
fractionating the skeletal isomerization reaction product,
isomerizing the 1-butene contained therein to 2-butenes, and
recovering an overhead fraction comprising isobutane, a side draw fraction comprising isobutane and isobutene, and a bottoms fraction comprising 2-butenes; and

combining the bottoms fraction with an ethylene stream and converting the ethylene and 2-butenes to produce a reaction effluent comprising propylene.