Patent ID: 11873453
Assignee: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A method of making a high quality isoparaffinic base stock comprising the steps of:
providing a hydrocarbon feedstock having a hydrocarbon feedstock viscosity index comprising one or more high VI components;
providing a first solvent;
contacting an adsorbent material with the hydrocarbon feedstock and the first solvent;
separating at least some of the one or more high VI components from the hydrocarbon feedstock to produce a first fraction base stock having a first fraction base stock viscosity index;
contacting the adsorbent material with a second solvent; and
desorbing the adsorbent material to produce a second fraction base stock having a second fraction base stock viscosity index, wherein the first fraction base stock viscosity index is less than the hydrocarbon feedstock viscosity index and the second fraction base stock viscosity index is greater than the hydrocarbon feedstock viscosity index,
wherein the method further comprises the step of contacting a nanofiltration membrane with the first fraction base stock and/or the second fraction base stock to recover the first solvent, the second solvent and/or a combination thereof and produce a recovered solvent.