Patent ID: 7875755

Claim:
A process for increasing the light olefin yields from an olefin cracking process, comprising: passing an olefin rich stream to a first olefin cracking unit operated at olefin cracking reaction conditions, thereby generating an olefin process stream; passing the olefin process stream to a separation unit thereby generating a first stream rich in propylene and ethylene, a second stream comprising butenes and butanes, and a third stream comprising un-converted paraffins; passing the second stream to a second olefin cracking unit, and the second olefin cracking unit is operated at a lower pressure than the first olefin cracking unit; passing the third stream to an isomerization reactor to generate a fourth stream comprising normal and iso-paraffins; and passing the fourth stream to a paraffin cracking unit operated at paraffin cracking reaction conditions, thereby generating a paraffin process stream.