Production of lubricant oils from thermally cracked resids

Patent metadata

Field	Value
Publication number	US-11292977-B2
Application number	US-202017066573-A
Country	US
Kind code	B2
Filing date	Oct 9, 2020
Priority date	Apr 13, 2015
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

Methods are provided for processing deasphalted gas oils derived from thermally cracked resid fractions to form Group I, Group II, and/or Group III lubricant base oils. The yield of lubricant base oils (optionally also referred to as base stocks) can be increased by thermally cracking a resid fraction at an intermediate level of single pass severity relative to conventional methods. By performing thermal cracking to a partial level of conversion, compounds within a resid fraction that are beneficial for increasing both the viscosity and the viscosity index of a lubricant base oil can be retained, thus allowing for an improved yield of higher viscosity lubricant base oils from a thermally cracked resid fraction.

First claim

What is claimed is:

1. A naphthenic base oil composition comprising: at least 40 wt % naphthenes, the naphthenic base oil having a viscosity index of at least 120, the naphthenic base oil having a viscosity at 100° C. of at least 10 cSt.

2. The naphthenic base oil composition of claim 1 , wherein the naphthenic base oil composition comprises at least 90 wt% saturated molecules.

3. The naphthenic base oil composition of claim 2 , wherein the naphthenic base oil composition comprises less than 0.03 wt % sulfur.

4. The naphthenic base oil composition of claim 2 , wherein the naphthenic base oil composition has a pour point of −15° C. or less.

5. The naphthenic base oil composition of claim 2 , wherein the naphthenic base oil composition has a pour point of −18° C. or less.

6. The naphthenic base oil composition of claim 2 , wherein the naphthenic base oil composition has a pour point of −20° C. or less.

7. The naphthenic base oil composition of claim 2 , wherein the naphthenic base oil composition has a viscosity index of about 120 to about 160.

8. The naphthenic base oil composition of claim 7 , wherein the naphthenic base oil composition has a viscosity index of about 140 to about 160.

9. The naphthenic base oil composition of claim 2 , wherein the naphthenic base oil has a viscosity at 100° C. of about 15 cSt to about 50 cSt.

10. The naphthenic base oil composition of claim 9 , wherein the naphthenic base oil has a viscosity at 100° C. of about 20 cSt to about 50 cSt.

11. The naphthenic base oil composition of claim 2 , wherein the naphthenic base oil has at least 25 wt % 3+ ring naphthenes.

12. The naphthenic base oil composition of claim 11 , wherein the naphthenic base oil has at least 35 wt % 3+ ring naphthenes.

13. The naphthenic base oil composition of claim 12 , wherein the naphthenic base oil has at least 40 wt % 3+ ring naphthenes.

14. The naphthenic base oil composition of claim 2 , wherein the naphthenic base oil has a T5 boiling point of at least 370° C.

15. The naphthenic base oil composition of claim 2 , wherein the naphthenes are 2-4 ring naphthenes having linear sidechains.

16. A naphthenic base oil composition comprising:
at least 20 wt % 3+ ring naphthenes, the naphthenic base oil having a viscosity of at least 15 cSt at 100° C. and a viscosity index of about 80 to about 120.

17. The naphthenic base oil of claim 16 , wherein the naphthenic base oil has at least 35 wt % 3+ ring naphthenes.

18. The naphthenic base oil composition of claim 17 , wherein the naphthenic base oil has at least 40 wt % 3+ ring naphthenes.

19. The naphthenic base oil composition of claim 16 , wherein the naphthenic base oil has a viscosity at 100° C. of about 20 cSt to about 50 cSt.

20. The naphthenic base oil composition of claim 16 , wherein the naphthenes have linear sidechains.

Assignees

• Exxonmobil Res & Eng Co

Inventors

• Brown Stephen H
• Raich Brenda A
• Gooding Beatrice M
• Davis Stephen M
• Barrai Federico
• Ames Warren B
• Aldous Keith K

Classifications

• C10G55/04 Primary

  including at least one thermal cracking step · CPC title

• C10G67/049

  The hydrotreatment being a hydrocracking · CPC title

• C10G67/00

  Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one process for refining in the absence of hydrogen only · CPC title

• C10G2300/1059

  Gasoil having a boiling range of about 330 - 427 °C · CPC title

• C10G67/0454

  Solvent desasphalting · CPC title