US 12,031,093 B1
Method of producing pyrolysis oil with reduced impurities
Sang Hwan Jo, Daejeon (KR); Soo Kil Kang, Daejeon (KR); Ho Won Lee, Daejeon (KR); and Yong Seong Jeong, Daejeon (KR)
Assigned to SK INNOVATION CO., LTD., Seoul (KR); and SK GEO CENTRIC CO., LTD., Seoul (KR)
Filed by SK INNOVATION CO., LTD., Seoul (KR); and SK GEO CENTRIC CO., LTD., Seoul (KR)
Filed on Dec. 1, 2023, as Appl. No. 18/525,852.
Claims priority of application No. 10-2023-0099389 (KR), filed on Jul. 31, 2023.
Int. Cl. C10G 1/10 (2006.01); C08J 11/12 (2006.01); C08J 11/24 (2006.01); C10G 1/00 (2006.01)
CPC C10G 1/10 (2013.01) [C08J 11/12 (2013.01); C08J 11/24 (2013.01); C10G 1/002 (2013.01); C08J 2367/02 (2013.01); C10G 2300/1003 (2013.01); C10G 2300/202 (2013.01); C10G 2300/4006 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of producing waste plastic pyrolysis oil with reduced nitrogen, the method comprising:
O1) depolymerizing polyethylene terephthalate (PET) with alcohol to obtain a depolymerization product;
O2) separating monomers from the depolymerization product and recovering a remaining depolymerization residue;
O3) introducing the depolymerization residue and waste plastics into a pyrolysis reactor and pyrolyzing the waste plastics;
O4) recovering pyrolysis oil in the pyrolysis reactor; and
O5) hydrotreating the pyrolysis oil.