Processes and systems for making recycle content hydrocarbons
Processes and systems for making recycle content hydrocarbons, including olefins, are provided that integrate a cracker unit with one or more other processing units. For example, in some cases, a fluidized catalytic cracking unit may be used to crack recycle content pyrolysis oil and the effluent from the FCC may be further processed in a conventional cracker unit, including its downstream separation zone, to provide recycle content hydrocarbon product stream. In other cases, a pyrolysis unit and cracking unit may be co-located and may share at least one utility, service group, boundary, conduit, energy exchange zone, and/or geographical area.
1. A process for making olefins, said process comprising:
(a) catalytically cracking a feed stream comprising recycle content pyrolysis oil (r-pyoil) in a fluidized catalytic cracking unit (FCC) to provide an FCC effluent stream; wherein said pyrolysis oil is produced from plastic waste;
(b) separating at least a portion of said FCC effluent stream in at least one fractionator to provide at least one FCC product stream comprising a recycle content hydrocarbon composition (r-hydrocarbon); and
(c) cracking said FCC product stream in a thermal cracking furnace to form an olefin-containing effluent stream.
2. The process of claim 1 , wherein said FCC product stream comprises a recycle content C5 to C22 hydrocarbon composition (r-C5 to C22).
3. The process of claim 2 , wherein said FCC product stream is selected from the group consisting of recycle content naphtha (r-naphtha), recycle content gasoline (r-gasoline), and recycle content diesel (r-diesel).
4. The process of claim 1 , wherein said FCC product stream comprises a recycle content C2 to C4 hydrocarbon (r-C2 to C4).
5. The process of claim 1 , wherein the FCC product stream is predominantly propane.
6. The process of claim 1 , wherein the FCC product stream is predominantly ethane.
7. The process of claim 6 , further comprising combining at least a portion of said FCC product stream with at least a portion of the olefin-containing effluent from said thermal cracking furnace.
8. The process of claim 1 , wherein said FCC is newly constructed for cracking a feed comprising r-pyoil.
9. The process of claim 1 , wherein said FCC product stream comprises at least 5 and/or not more than 99 weight percent of the r-hydrocarbon composition.
10. The process of claim 9 , wherein the feed stream to said FCC comprises at least 5 and/or not more than 99 weight percent of r-pyoil, based on the total weight of the feed stream.
11. The process of claim 10 , wherein said cracking is carried out in the presence of a catalyst selected from the group consisting of Y zeolite, ZSM-5, and combinations thereof.
12. The process of claim 11 , wherein said thermal cracker is a gas cracker.