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

Claim 23:
24. A system for making a high quality isoparaffinic base stock comprising:
an adsorption bed comprising a molecular sieve, wherein the molecular sieve has a ring size of 11 rings or high, a pore size less than 5.9 Å or greater, and a crystal size of about 0.5 microns or less;
a reservoir comprising at least one hydrocarbon feedstock fluidically connected to the molecular sieve, wherein the hydrocarbon feedstock has a hydrocarbon feedstock viscosity index and one or more high VI components;
a source of one or more solvents fluidically connected to the molecular sieve; and
a solvent recovery system in fluidic communication with the molecular sieve and comprises a nanofiltration membrane for solvent recovery,
wherein the molecular sieve is contacted with a first solvent from the supply and/or the solvent recovery system to produce a first fraction base stock having a first fraction base stock viscosity index less than the hydrocarbon feedstock viscosity index wherein at least a portion of the one or more high VI components are adsorbed onto the molecular sieve, and the molecular sieve is desorbed with the first solvent and/or a second solvent or combination thereof to produce a second fraction base stock, the second fraction base stock having a second fraction base stock viscosity index greater than the hydrocarbon feedstock viscosity index, and the first solvent and/or the second solvent are recovered from the nanofiltration membrane.