Production of upgraded extract and raffinate

• US 10,450,517 B2
• Filed: 05/19/2017
• Issued: 10/22/2019
• Est. Priority Date: 05/25/2016
• Status: Active Grant

• Current Assignee: ExxonMobil Research & Engineering Company (Exxon Mobil Corporation)
• Original Assignee: ExxonMobil Research & Engineering Company (Exxon Mobil Corporation)
• Inventors: Umansky, Benjamin S., Aldous, Keith K., Gleeson, James W., Blok, Edward J., Demmin, Richard A.
• Primary Examiner(s): Boyer, Randy
• Application Number:
  US15/599,636
• Publication Number:
  US 20170342330A1
• Time in Patent Office: 886 Days
• CPC Class Codes: C10G 21/00 Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents C10G17/00, C10G19/00 take precedence
• CPC Class Codes: C10G 2300/10 Feedstock materials
• CPC Class Codes: C10G 2300/202 Heteroatoms content, i.e. S, N, O, P
• CPC Class Codes: C10G 2300/301 Boiling range
• CPC Class Codes: C10G 2300/304 Pour point, cloud point, cold flow properties
• CPC Class Codes: C10G 2400/04 Diesel oil
• CPC Class Codes: C10G 2400/30 Aromatics
• CPC Class Codes: C10G 45/02 to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing
• CPC Class Codes: C10G 45/10 containing platinum group metals or compounds thereof
• CPC Class Codes: C10G 45/22 with hydrogen dissolved or suspended in the oil
• CPC Class Codes: C10G 45/58 to change the structural skeleton of some of the hydrocarbon content without cracking the other hydrocarbons present, e.g. lowering pour point; Selective hydrocracking of normal paraffins C10G32/00 takes precedence; improving or increasing the octane number or aromatic content of naphtha C10G35/00
• CPC Class Codes: C10G 45/72 Controlling or regulating
• CPC Class Codes: C10G 47/02 characterised by the catalyst used
• CPC Class Codes: C10G 49/26 Controlling or regulating
• CPC Class Codes: C10G 67/0418 The hydrotreatment being a hydrorefining
• CPC Class Codes: C10G 67/14 including at least two different refining steps in the absence of hydrogen

Abstract

Systems and methods are provided for producing upgraded raffinate and extract products from lubricant boiling range feeds and/or other feeds having a boiling range of 400° F. (204° C.) to 1500° F. (816° C.) or more. The upgraded raffinate and/or extract products can have a reduced or minimized concentration of sulfur, nitrogen, metals, or a combination thereof. The reduced or minimized concentration of sulfur, nitrogen, and/or metals can be achieved by hydrotreating a suitable feed under hydrotreatment conditions corresponding to relatively low levels of feed conversion. Optionally, the feed can also dewaxed, such as by catalytic dewaxing or by solvent dewaxing. Because excessive aromatic saturation is not desired, the pressure for hydrotreatment (and optional dewaxing) can be 500 psig (˜3.4 MPa) to 1200 psig (˜8.2 MPa).

Claims

1. A raffinate product having a pour point of 0°

C. or less comprising 6.1 wt % to 11.8 wt % of total paraffins, about 60 wt % to about 75 wt % of total naphthenes, 6 wt % to 15 wt % of 4+-ring naphthenes, less than 1000 wppm of sulfur, less than 50 wppm of nitrogen, 2 wt % to 30 wt % of total aromatics and less than 3.0 wt % of polycyclic aromatics.

2. The raffinate product of claim 1, wherein the raffinate product has a metals content of less than 10 wppm.

3. The raffinate product of claim 1, the raffinate product comprising 2 wt % to 20 wt % of total aromatics.

4. The raffinate product of claim 1, wherein the raffinate product comprises 9 wt % to 17 wt % of 3-ring naphthenes, and 6 wt % to 8 wt % of 4+-ring naphthenes.

5. The raffinate product of claim 1, wherein the raffinate product has a pour point of −

9°

C. or less.