US 12,146,106 B2
Pyrolysis of plastic waste to produce light gaseous hydrocarbons and integration with an ethylene cracker
Ronald G. Abbott, Porter, TX (US); Bruce D. Murray, Kingwood, TX (US); Scott G. Morrison, Kingwood, TX (US); and Bradley T. Price, Kingwood, TX (US)
Assigned to Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed by CHEVRON PHILLIPS CHEMICAL COMPANY LP, The Woodlands, TX (US)
Filed on Apr. 12, 2022, as Appl. No. 17/658,921.
Claims priority of provisional application 63/175,978, filed on Apr. 16, 2021.
Prior Publication US 2022/0340820 A1, Oct. 27, 2022
Int. Cl. C10G 1/00 (2006.01); C07C 4/04 (2006.01); C08F 10/02 (2006.01); C10B 53/07 (2006.01); C10B 57/06 (2006.01); C10G 1/10 (2006.01); C10G 9/36 (2006.01); C10G 11/18 (2006.01); C10L 1/06 (2006.01); C10L 1/08 (2006.01); C10L 3/06 (2006.01)
CPC C10G 1/002 (2013.01) [C07C 4/04 (2013.01); C08F 10/02 (2013.01); C10B 53/07 (2013.01); C10B 57/06 (2013.01); C10G 1/10 (2013.01); C10G 9/36 (2013.01); C10G 11/18 (2013.01); C10L 1/06 (2013.01); C10L 1/08 (2013.01); C10L 3/06 (2013.01); C10G 2300/1003 (2013.01); C10G 2300/4081 (2013.01); C10G 2400/02 (2013.01); C10G 2400/04 (2013.01); C10G 2400/20 (2013.01); C10G 2400/26 (2013.01); C10G 2400/30 (2013.01); C10L 2200/0461 (2013.01); C10L 2270/023 (2013.01); C10L 2270/026 (2013.01)] 36 Claims
OG exemplary drawing
 
1. A process for recycling plastic waste, the process comprising:
(a) pyrolyzing a plastic waste in a pyrolysis unit under a first set of pyrolysis conditions to produce a pyrolysis unit effluent comprising a pyrolysis gas and a pyrolysis oil in a known ratio and separating the pyrolysis gas from the pyrolysis oil, wherein the pyrolysis gas comprises C5 and lighter (C1, C2, C3, C4, and C5) hydrocarbons, including ethylene, propylene, and butylene (EPB);
(b) feeding a first feed stream to a steam cracker furnace to produce a steam cracker furnace effluent comprising ethylene, propylene, and light (C2-C3) saturated hydrocarbons;
(c) providing to a separation unit a separation unit feed comprising at least a portion of the pyrolysis gas and at least a portion of the steam cracker furnace effluent; and
(d) separating the separation unit feed to provide circular products comprising an ethylene effluent, a propylene effluent, and a light (C2-C3) saturated hydrocarbon effluent.