Appeal No. 1998-2624
Application No. 08/696,578
cracked gases comprising:
(a) compressing the cracked gas to a pressure
ranging from about 50 to about 250 psig to
produce a compressed cracked gas stream;
(b) washing said compressed gas to remove acidic
gases from said compressed cracked gas stream to
produce a washed compressed cracked gas stream;
(c) selectively hydrogenating acetylenes and
dienes contained in the washed compressed cracked gas
stream to produce a hydrogenated washed compressed gas
stream;
(d) scrubbing said hydrogenated washed compressed
gas stream in an absorber tower with a scrubbing
solution comprising a metallic salt to form a scrubbed
gaseous stream rich in paraffins and hydrogen and a
scrubbed liquid stream rich in olefins and rich
scrubbing solution;
(e) stripping said scrubbed liquid stream in an
olefin stripper to produce a stripped gas stream rich
in olefins and a lean liquid stream;
(f) separating said stripped gas stream rich in
olefins into at least one of an ethylene-rich product
stream, a propylene-rich product stream and a butene-
rich product stream.
23. A process for the recovery of olefins from
cracked gases comprising:
(a) compressing the cracked gas to a pressure
ranging from about 50 to about 250 psig to produce a
compressed cracked gas stream;
(b) washing said compressed cracked gas to remove
acidic gases from said compressed cracked gas stream
to produce a washed compressed cracked gas stream;
(c) selectively hydrogenating acetylenes and
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