US 12,326,865 B2
Chemical recycling of plastic-derived streams to a cracker separation zone
Daryl Bitting, Longview, TX (US); David Eugene Slivensky, Tatum, TX (US); Xianchun Wu, Longview, TX (US); Michael Paul Ekart, Kingsport, TN (US); and Bruce Roger DeBruin, Gray, TN (US)
Assigned to Eastman Chemical Company, Kingsport, TN (US)
Appl. No. 17/760,371
Filed by Eastman Chemical Company, Kingsport, TN (US)
PCT Filed Feb. 10, 2021, PCT No. PCT/US2021/017352
§ 371(c)(1), (2) Date Aug. 9, 2022,
PCT Pub. No. WO2021/163113, PCT Pub. Date Aug. 19, 2021.
Claims priority of provisional application 62/972,291, filed on Feb. 10, 2020.
Prior Publication US 2023/0116183 A1, Apr. 13, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 7/09 (2006.01); B01D 5/00 (2006.01); C10B 53/07 (2006.01); C10G 1/00 (2006.01); C10G 1/10 (2006.01); G06F 16/2455 (2019.01); G06F 16/25 (2019.01)
CPC G06F 16/24558 (2019.01) [B01D 5/0036 (2013.01); C07C 7/09 (2013.01); C10B 53/07 (2013.01); C10G 1/002 (2013.01); C10G 1/10 (2013.01); G06F 16/254 (2019.01); C10G 2300/1003 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for making an olefin product, said method comprising: separating a feed stream comprising a recycle content pyrolysis gas (r-pyrolysis gas) in at least one fractionator downstream of a cracker furnace, wherein said r-pyrolysis gas has not been produced in said cracker furnace; wherein said r-pyrolysis gas is produced from mixed plastic waste; and wherein said cracking furnace produces said olefin product, and wherein said r-pyrolysis gas comprises: at least 20 and/or not more than 75 weight percent of ethylene and/or propylene, at least 5 and/or not more than 50 weight percent of ethane and/or propane, at least 5 and/or not more than 60 weight percent of methane, an ethylene to ethane weight ratio or propylene to propane weight ratio of at least 1:1 and/or not more than 3:1, and at least one of the following properties (i) through (ix):
(i) C4 hydrocarbons in an amount of not more than 20 weight percent; (ii) hydrogen in an amount of not more than 10 weight percent; (iii) C3+ diolefins in an amount of not more than 10 weight percent; (iv) C4+ olefins in an amount of not more than 10 weight percent; (v) C4 paraffins in an amount of not more than 5 weight percent; (vi) halogens in an amount of not more than 1 ppm; (v) carbonyls in an amount of not more than 100 ppm; (vi) carbon dioxide in an amount of not more than 100 ppm; (vii) carbon monoxide in an amount of not more than 2500 ppm; (viii) arsine and/or phosphine in an amount of not more than 15 ppb; and (ix) sulfur-containing compounds in an amount of not more than 100 ppm, wherein each of the above quantities are in amounts by weight, based on the total weight of the composition.