US 12,221,582 B2
Method and apparatus for producing high value-added oil from waste plastic pyrolysis oil
Ka Young Kim, Daejeon (KR); Ok Youn Kim, Daejeon (KR); Young Moo Park, Daejeon (KR); and Hee Jung Jeon, Daejeon (KR)
Assigned to SK Geo Centric Co., Ltd., Seoul (KR); and SK Innovation Co., Ltd., Seoul (KR)
Filed by SK Innovation Co., Ltd., Seoul (KR); and SK Geo Centric Co., Ltd., Seoul (KR)
Filed on Sep. 9, 2022, as Appl. No. 17/941,068.
Claims priority of application No. 10-2021-0120894 (KR), filed on Sep. 10, 2021.
Prior Publication US 2023/0093149 A1, Mar. 23, 2023
Int. Cl. C10G 65/12 (2006.01); B01J 19/24 (2006.01); C10G 1/00 (2006.01); C10G 1/10 (2006.01)
CPC C10G 65/12 (2013.01) [B01J 19/245 (2013.01); C10G 1/002 (2013.01); C10G 1/10 (2013.01); B01J 2219/0004 (2013.01); C10G 2300/1003 (2013.01); C10G 2300/202 (2013.01); C10G 2300/301 (2013.01); C10G 2300/4006 (2013.01); C10G 2300/4018 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of refining waste plastic pyrolysis oil, comprising the steps of:
a reactant introducing step of introducing the waste plastic pyrolysis oil containing a light oil component and a hydrogen gas into a first reactor;
a first hydrotreating step of producing a first refined oil, from which impurities are primarily removed, by performing a primary hydrotreating reaction on the waste plastic pyrolysis oil in the first reactor under a first hydrotreating catalyst;
an intermediate product introducing step of introducing a fluid containing the first refined oil introduced in the first hydrotreating step into a second reactor having a reaction space including a first region and a second region and introducing the fluid into the first region;
a second hydrotreating step of producing a second refined oil, from which impurities are secondarily removed, by performing a secondary hydrotreating reaction on an oil component in the fluid under a second hydrotreating catalyst in the first region; and
a hydrocracking step of producing a third refined oil containing naphtha and kerosene by performing a hydrocracking reaction on an oil component in a fluid containing the second refined oil introduced from the first region under a hydrocracking catalyst in the second region,
wherein a ratio of a liquid hourly space velocity (LHSV) of the first reactor and the second reactor is 1:0.1 to 0.8.