Integrated light olefin separation/cracking process

摘要

Systems and methods for producing a hydrocarbon are provided. The method can include separating a hydrocarbon comprising olefins and paraffins to produce an olefin-rich hydrocarbon comprising about 70 wt % or more olefins and a paraffin-rich hydrocarbon comprising about 70 wt % or more paraffins. The method can also include cracking at least a portion of the olefin-rich hydrocarbon in the presence of one or more catalysts at conditions sufficient to produce a cracked product comprising about 20 wt % or more C2-C3 olefins.

主权项

1. A method for producing a hydrocarbon comprising:
contacting a hydrocarbon comprising olefins and paraffins with an adsorbent; adsorbing at least a portion of the olefins to provide an olefin-lean hydrocarbon; displacing at least a portion of the adsorbed olefins from the adsorbent with a displacement medium to provide a mixture of the displacement medium and an olefin-rich hydrocarbon comprising about 95 wt % or more olefins; fractionating the olefin-lean hydrocarbon to provide a first recycle displacement medium and a paraffin-rich hydrocarbon comprising about 70 wt % or more paraffins; separating the displacement medium from the olefin-rich hydrocarbon to produce a second recycle displacement medium; cracking at least a portion of the olefin-rich hydrocarbon in the presence of one or more catalysts at a temperature of about 605° C. to about 670° C. to produce a first cracked product comprising about 95 wt % or more C2-C10 hydrocarbons, wherein the C2-C10 hydrocarbons comprise about 20 wt % or more C2-C3 olefins; separating the first cracked product to provide an ethylene product; and recycling at least a portion of the ethylene product to the olefin-rich hydrocarbon prior to cracking.