Patent ID: 8203026

Claim:
A process for making a base oil, comprising: a. mixing one or more longer chain alpha olefins comprising C6+ olefins comprising 1-hexene, 1-octene, 1-decene, 1-dodecene, or a mixture thereof with an olefin feed comprising propylene to make a mixed olefin feed; and b. oligomerizing the mixed olefin feed using an acidic chloroaluminate ionic liquid catalyst which is a quaternary ammonium chloaluminate to form an oligomer; wherein the oligomer is a base oil that has: i. a kinematic viscosity at 100° C. greater than 10 mm2/s; ii. a viscosity index from 50 to 90; iii. a pour point less than −19° C.; and iv. a cloud point less than −50° C.