Refining apparatus and refining method of waste plastic pyrolysis oil

Patent metadata

Field	Value
Publication number	US-2025230369-A1
Application number	US-202218708213-A
Country	US
Kind code	A1
Filing date	Nov 24, 2022
Priority date	Nov 26, 2021
Publication date	Jul 17, 2025
Grant date	—

Abstract

Provided is a refining apparatus of a waste plastic pyrolysis oil including a reactor where a waste plastic pyrolysis oil is introduced and hydrotreated, wherein the reactor includes Area 1 including a hydrotreating catalyst having a Mo content of 1 to 15 wt % with respect to the total weight; and Area 2 including a hydrotreating catalyst having a Mo content of 5 to 40 wt % and a Ni or Co content of 4 to 50 wt % with respect to the total weight, and the waste plastic pyrolysis oil is refined by passing through Area 1 and Area 2 sequentially.

First claim

1 . A refining apparatus of a waste plastic pyrolysis oil comprising a reactor where a waste plastic pyrolysis oil is introduced and hydrogenated,
wherein the reactor includes Area 1 including a hydrotreating catalyst having a Mo content of 1 to 15 wt % with respect to the total weight; and Area 2 including a hydrotreating catalyst having a Mo content of 5 to 40 wt % and a Ni or Co content of 4 to 50 wt % with respect to the total weight, and the waste plastic pyrolysis oil is refined by passing through Area 1 and Area 2 sequentially.

2 . The refining apparatus of a waste plastic pyrolysis oil of claim 1 ,
wherein Area 1 includes Area 1-1 including a hydrotreating catalyst having a Mo content of 1 to 15 wt % with respect to the total weight; and Area 1-2 including a hydrotreating catalyst having a Mo content of 1 to 15 wt % and a Ni or Co content of 0.1 to 4 wt % with respect to the total weight, and the waste plastic pyrolysis oil is refined by passing through Area 1-1 and Area 1-2 sequentially.

3 . The refining apparatus of a waste plastic pyrolysis oil of claim 2 ,
wherein Area 2 includes Area 2-1 including a hydrotreating catalyst having a Mo content of 15 to 40 wt % and a Ni or Co content of 4 to 30 wt % with respect to the total weight; and Area 2-2 including a hydrotreating catalyst having a Mo content of 5 to 15 wt %, a Ni or Co content of 30 to 50 wt %, and a W content of 40 to 60 wt % with respect to the total weight, and a fluid discharged from Area 1-2 is refined by passing through Area 2-1 and Area 2-2 sequentially.

4 . The refining apparatus of a waste plastic pyrolysis oil of claim 3 , the hydrotreating catalysts respectively in Area 1-1, Area 1-2, Area 2-1, and Area 2-2 includes 10 to 30 wt % of the hydrotreating catalysts in Area 1-1; 20 to 40 wt % of the hydrotreating catalysts in Area 1-2; 30 to 50 wt % of the hydrotreating catalysts in Area 2-1; and 5 to 15 wt % of the hydrotreating catalysts in Area 2-2 with respect to the total weight.

5 . (canceled)

6 . The refining apparatus of a waste plastic pyrolysis oil of claim 2 , wherein the hydrotreating catalyst of Area 1-1 includes mesopores having a ratio of pores having a pore size of 100 to 200 Å of 50% or more, and has an average pore size of 150 to 250 Å and an average pore volume of 0.7 to 2 ml/g.

7 . The refining apparatus of a waste plastic pyrolysis oil of claim 2 , wherein the hydrotreating catalyst of Area 1-2 includes mesopores having a ratio of pores having a pore size of 80 to 150 Å of 50% or more, and has an average pore size of 100 to 150 Å and an average pore volume of 0.4 to 0.8 ml/g.

8 . The refining apparatus of a waste plastic pyrolysis oil of claim 3 , wherein the hydrotreating catalyst of Area 2-1 includes mesopores having a ratio of pores having a pore size of 50 to 100 Å of 50% or more, and has an average pore size of 50 to 100 Å and an average pore volume of 0.1 to 0.5 ml/g.

9 . The refining apparatus of a waste plastic pyrolysis oil of claim 3 , wherein the hydrotreating catalyst of Area 2-2 has an average pore size of 10 to 50 Å and an average pore volume of 0.01 to 0.4 ml/g.

10 . The refining apparatus of a waste plastic pyrolysis oil of claim 2 , wherein impurities included in a heavy hydrocarbon oil fraction in the waste plastic pyrolysis oil are selectively removed in Area 1-1, and impurities included in a middle hydrocarbon oil fraction in the waste plastic pyrolysis oil are selectively removed in Area 1-2.

11 . The refining apparatus of a waste plastic pyrolysis oil of claim 3 , wherein impurities included in a light hydrocarbon oil fraction in the waste plastic pyrolysis oil are selectively removed in Area 2-1, and an unsaturated double bond of the waste plastic pyrolysis oil is selectively removed in Area 2-2.

12 . The refining apparatus of a waste plastic pyrolysis oil of claim 1 , further comprising a guard bed, wherein the waste plastic pyrolysis oil is hydrotreated in the guard bed and then introduced to the reactor.

13 . (canceled)

14 . A refining method of a waste plastic pyrolysis oil, the method comprising:
Step 1 of hydrotreating a waste plastic pyrolysis oil in the presence of a hydrotreating catalyst having a Mo content of 1 to 15 wt % with respect to the total weight; and Step 2 of hydrotreating a fluid produced from Step 1 in the presence of a hydrotreating catalyst having a Mo content of 5 to 40 wt % and a Ni or Co content of 4 to 50 wt % with respect to the total weight.

15 . The refining method of a waste plastic pyrolysis oil of claim 14 ,
wherein Step 1 includes: Step 1-1 of hydrotreating a waste plastic pyrolysis oil in the presence of a hydrotreating catalyst having a Mo content of 1 to 15 wt % with respect to the total weight; and Step 1-2 of hydrotreating a fluid produced from Step 1-1 in the presence of a hydrotreating catalyst having a Mo content of 1 to 15 wt % and a Ni or Co content of 0.1 to 4 wt % with respect to the total weight.

16 . The refining method of a waste plastic pyrolysis oil of claim 15 ,
wherein Step 2 includes: Step 2-1 of hydrotreating a fluid produced from Step 1-2 in the presence of a hydrotreating catalyst having a Mo content of 15 to 40 wt % and a Ni or Co content of 4 to 30 wt % with respect to the total weight; and Step 2-2 of hydrotreating a fluid produced from Step 2-1 in the presence of a hydrotreating catalyst having a Mo content of 5 to 15 wt %, a Ni or Co content of 30 to 50 wt %, and a W content of 40 to 60 wt % with respect to the total weight.

17 . The refining apparatus of a waste plastic pyrolysis oil of claim 16 ,
the hydrotreating catalysts respectively in Step 1-1, Step 1-2, Step 2-1, and Step 2-2 includes 10 to 30 wt % of the hydrotreating catalysts in Step 1-1; 20 to 40 wt % of the hydrotreating catalysts in Step 1-2; 30 to 50 wt % of the hydrotreating catalysts in Step 2-1; and 5 to 15 wt % of the hydrotreating catalysts in Step 2-2 with respect to the total weight.

18 . (canceled)

19 . The refining method of a waste plastic pyrolysis oil of claim 15 , wherein the hydrotreating catalyst of Step 1-1 includes mesopores having a ratio of pores having a pore size of 100 to 200 Å of 50% or more, and has an average pore size of 150 to 250 Å and an average pore volume of 0.7 to 2 ml/g.

20 . The refining method of a waste plastic pyrolysis oil of claim 15 , wherein the hydrotreating catalyst of Step 1-2 includes mesopores having a ratio of pores having a pore size of 80 to 150 Å of 50% or more, and has an average pore size of 100 to 150 Å and an average pore volume of 0.4 to 0.8 ml/g.

21 . The refining method of a waste plastic pyrolysis oil of claim 16 , wherein the hydrotreating catalyst of Step 2-1 includes mesopores having a ratio of pores having a pore size of 50 to 100 Å of 50% or more, and has an average pore size of 50 to 100 Å and an average pore volume of 0.1 to 0.5 ml/g.

22 . The refining method of a waste plastic pyrolysis oil of claim 16 , wherein the hydrotreating catalyst of Step 2-2 has an average pore size of 10 to 50 Å and an average pore volume of 0.01 to 0.4 ml/g.

23 . The refining method of a waste plastic pyrolysis oil of claim 14 , further comprising: supplying a sulfur source to the hydrotreating catalyst before Step 1.

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

• B01J2208/025

  Two or more types of catalyst · CPC title

• B01J27/19

  Molybdenum · CPC title

• B01J23/28

  Molybdenum · CPC title

• B01J8/0492

  Feeding reactive fluids (for solid material, see B01J8/0015) · CPC title