Waste plastic pyrolysis oil refining equipment and method of refining waste plastic pyrolysis oil

Patent metadata

Field	Value
Publication number	US-2024409824-A1
Application number	US-202218697484-A
Country	US
Kind code	A1
Filing date	Oct 27, 2022
Priority date	Oct 29, 2021
Publication date	Dec 12, 2024
Grant date	—

Abstract

Provided is waste plastic pyrolysis oil refining equipment including: a guard bed 100 where a waste plastic pyrolysis oil and a hydrogen gas are introduced and hydrotreated at a first temperature in the presence of a hydrotreating catalyst to produce a fluid from which chlorine has been removed; a main bed 200 where the fluid and the hydrogen gas are introduced from the guard bed 100 and hydrotreated at a second temperature higher than the first temperature in the presence of a hydrotreating catalyst to produce a refined oil from which impurities have been removed; and a recovery tank 300 where the refined oil from which impurities have been removed is recovered from the main bed 200, wherein a temperature before the refined oil is recovered to the recovery tank 300 is maintained at 290° C. or higher and lower than 350° C.

First claim

1 . Waste plastic pyrolysis oil refining equipment comprising:
a guard bed where a waste plastic pyrolysis oil and a hydrogen gas are introduced and hydrotreated at a first temperature in the presence of a hydrotreating catalyst to produce a fluid from which chlorine has been removed; a main bed where the fluid and the hydrogen gas are introduced from the guard bed and hydrotreated at a second temperature higher than the first temperature in the presence of a hydrotreating catalyst to produce a refined oil from which impurities have been removed; and a recovery tank where the refined oil from which impurities have been removed is recovered from the main bed, wherein a temperature before the refined oil is recovered to the recovery tank is maintained at 290° C. or higher and lower than 350° C.

2 . The waste plastic pyrolysis oil refining equipment of claim 1 , wherein the waste plastic pyrolysis oil includes 30 wt % or more of a medium to large hydrocarbon oil fraction of C 10 or higher having a boiling point of 180° C. or higher.

3 . The waste plastic pyrolysis oil refining equipment of claim 1 , wherein the first temperature is higher than 100° C. and lower than 300° C. and the second temperature is higher than 300° C. and lower than 450° C.

4 . The waste plastic pyrolysis oil refining equipment of claim 1 , wherein a moisture content in the refined oil from which impurities have been removed in the main bed is less than 100 ppm.

5 . The waste plastic pyrolysis oil refining equipment of claim 1 , further comprising: a heating means between the main bed and the recovery tank.

6 . The waste plastic pyrolysis oil refining equipment of claim 1 , wherein a reaction pressure of the guard bed and the main bed is more than 60 bar and less than 120 bar.

7 . The waste plastic pyrolysis oil refining equipment of claim 1 , wherein a liquid hourly space velocity (LHSV) ratio between the guard bed and the main bed is 1:0.1 to 1:0.8.

8 . A method of refining a waste plastic pyrolysis oil, the method comprising:
(S 1 ) hydrotreating a waste plastic pyrolysis oil with a hydrogen gas at a first temperature in the presence of a hydrotreating catalyst to produce a fluid from which chlorine has been removed; (S 2 ) hydrotreating the fluid with a hydrogen gas at a second temperature higher than the first temperature in the presence of a hydrotreating catalyst to produce a refined oil from which impurities have been removed; and (S 3 ) recovering the refined oil from which impurities have been removed, wherein a temperature before the refined oil is recovered is maintained at 290° C. or higher and lower than 350° C.

9 . The method of refining a waste plastic pyrolysis oil of claim 8 , wherein the waste plastic pyrolysis oil includes 30 wt % or more of a medium to large hydrocarbon oil fraction of C 10 or higher having a boiling point of 180° C. or higher.

10 . The method of refining a waste plastic pyrolysis oil of claim 8 , wherein the first temperature is higher than 100° C. and lower than 300° C., and the second temperature is higher than 300° C. and lower than 450° C.

11 . The method of refining a waste plastic pyrolysis oil of claim 8 , wherein a moisture content in the refined oil from which impurities have been removed in (S 2 ) is less than 100 ppm.

12 . The method of refining a waste plastic pyrolysis oil of claim 8 , wherein a reaction pressure in the hydrotreating of (S 1 ) and (S 2 ) is more than 60 bar and less than 120 bar.

13 . The method of refining a waste plastic pyrolysis oil of claim 8 , wherein a liquid hourly space velocity (LHSV) ratio in the hydrotreating between (S 1 ) and (S 2 ) is 1:0.1 to 1:0.8.

Assignees

• Sk Innovation Co Ltd
• Sk Geo Centric Co Ltd

Inventors

• Jeon Heejung
• Kim Okyoun
• Kim Kayoung
• Park Youngmoo
• Lee Howon

Classifications

• C10G2300/1003

  Waste materials · CPC title

• C10G65/04 Primary

  including only refining steps · CPC title

• C10G45/02

  to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing · CPC title

• B01J2208/00176

  outside the reactor · CPC title

• B01J8/0285

  Heating or cooling the reactor (for tubular reactors in furnaces B01J8/062) · CPC title