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

Claim 0:
1. A system for converting isobutane to propylene, the system comprising:
a dehydrogenation unit configured to receive an isobutane containing stream, convert isobutane to isobutene, and produce a mixed product stream comprising isobutane and isobutene;
a skeletal isomerization unit configured to receive the mixed product stream, convert isobutene to n-butenes including 1-butene and 2-butenes via skeletal isomerization, and produce a skeletal isomerization product stream comprising isobutane, isobutene, 1-butene, and 2-butenes;
a catalytic deisobutenizer unit configured to concurrently:
receive the skeletal isomerization product stream,
fractionate the skeletal isomerization product stream,
convert the 1-butene to 2-butenes, and
produce an overhead fraction comprising isobutane, a side draw fraction comprising isobutane and isobutene, and a bottoms fraction comprising 2-butenes; and

an olefin conversion unit configured to receive an ethylene stream and the bottoms fraction comprising 2-butenes, convert the ethylene and the 2-butenes to propylene via metathesis, and to produce a propylene product stream.