	US 12,441,944 B2
	Method and device for refining waste plastic pyrolysis oil
Yong Woon Kim, Daejeon (KR); Kyong Sik Park, Daejeon (KR); Min Woo Shin, Daejeon (KR); Jin Seong Jang, Daejeon (KR); Dong Keun Kim, Daejeon (KR); Joo Won Park, Daejeon (KR); Un Cheol Baek, Daejeon (KR); and Byung Kook Ahn, 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 Feb. 14, 2024, as Appl. No. 18/441,386.
Claims priority of application No. 10-2023-0102880 (KR), filed on Aug. 7, 2023.
Prior Publication US 2025/0051662 A1, Feb. 13, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. C10G 67/02 (2006.01); B01D 17/06 (2006.01); B01J 27/051 (2006.01); C10G 1/10 (2006.01)

CPC C10G 67/02 (2013.01) [B01D 17/06 (2013.01); B01J 27/051 (2013.01); C10G 1/10 (2013.01); C10G 2300/1003 (2013.01); C10G 2300/4012 (2013.01)]

19 Claims

1. A method for refining waste plastic pyrolysis oil, the method comprising the steps of:

S1) mixing waste plastic pyrolysis oil, washing water, and a demulsifier to form a first mixed solution and dehydrating the first mixed solution by applying a voltage to form a dehydrated first mixed solution; and

S2) mixing the dehydrated first mixed solution and a sulfur source to obtain a second mixed solution and hydrotreating the second mixed solution to produce a stream comprising a refined oil from which sulfur and nitrogen impurities have been removed.