	US 12,006,480 B2
	Method for processing liquefied waste polymers
Pekka Aalto, Porvoo (FI); Heikki Aaltonen, Porvoo (FI); Antti Ojala, Porvoo (FI); Andrea Pérez Nebreda, Porvoo (FI); Emma Sairanen, Porvoo (FI); Ville Paasikallio, Porvoo (FI); and Antti Kurkijärvi, Porvoo (FI)
Assigned to NESTE OYJ, Espoo (FI)
Appl. No. 18/259,794
Filed by Neste Oyj, Espoo (FI)
PCT Filed Oct. 29, 2021, PCT No. PCT/FI2021/050732 § 371(c)(1), (2) Date Jun. 29, 2023, PCT Pub. No. WO2022/144491, PCT Pub. Date Jul. 7, 2022.
Claims priority of application No. 20206385 (FI), filed on Dec. 30, 2020.
Prior Publication US 2023/0392084 A1, Dec. 7, 2023
Int. Cl. C10G 1/10 (2006.01); C10G 1/00 (2006.01); C10G 45/08 (2006.01); C10G 65/02 (2006.01); C10G 69/02 (2006.01)

CPC C10G 45/08 (2013.01) [C10G 1/002 (2013.01); C10G 1/10 (2013.01); C10G 65/02 (2013.01); C10G 69/02 (2013.01); C10G 2300/1003 (2013.01)]

14 Claims

1. A method for processing liquefied waste plastic (LWP), the method comprising the following steps:

a) providing an LWP stream containing diolefins and naphtha;

b) subjecting the LWP stream to a steam stripper to obtain a distillate containing diolefins and naphtha, and a distillate bottom;

c) subjecting the distillate to hydrotreatment reaction conditions in a presence of hydrogen and one or more hydrotreatment catalysts to produce diolefin depleted distillate, wherein the hydrotreatment reaction conditions include a temperature of 120-210° C., a pressure of 1-50 barg, and a liquid hourly space velocity (LHSV) of 1-5 h⁻¹, and the one or more hydrotreatment catalysts are selected from CoMo and NiMo;

d) separating the diolefin depleted distillate to:

one or more fractions including:

at least a naphtha fraction with a boiling point below 180° C. at atmospheric pressure,

an optional middle fraction with a boiling point between 180° C. and 360° C. at atmospheric pressure; and

a bottom fraction; and

e) subjecting the naphtha fraction of step d) to hydroprocessing reaction conditions in a presence of hydrogen and one or more hydroprocessing catalysts to produce hydrogenated naphtha.