	US 12,404,457 B2
	Process for purifying pyrolyzed plastic waste
Tuomas Ouni, Kulloo (FI); Kilian Piettre, Linz (AT); and Ammar Abdull Makic, Linz (AT)
Assigned to BOREALIS AG, Vienna (AT)
Appl. No. 17/923,028
Filed by Borealis AG, Vienna (AT)
PCT Filed May 25, 2021, PCT No. PCT/EP2021/063832 § 371(c)(1), (2) Date Nov. 3, 2022, PCT Pub. No. WO2021/239699, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 20176576 (EP), filed on May 26, 2020.
Prior Publication US 2023/0159836 A1, May 25, 2023
Int. Cl. B01J 23/42 (2006.01); C10G 1/00 (2006.01)

CPC C10G 1/002 (2013.01) [C10G 2300/1003 (2013.01)]

15 Claims

1. A process for purifying a pyrolyzed plastic waste, the process comprising the steps of:

a) providing the pyrolyzed plastic waste, wherein the pyrolyzed plastic waste is a liquid or a wax at 20° C. and 1 atm;

b) contacting the pyrolyzed plastic waste with activated carbon yielding a pretreated plastic waste, wherein step b) is carried out in a first vessel and step b) is carried out at a temperature in the range of from 5° C. to 100° C.;

c) hydrogenating the pretreated plastic waste using hydrogen and a metal-based catalyst yielding a hydrogenated plastic waste, wherein step c) is carried out in a second vessel.