Patent ID: 9387413
Filing Date: 2016-07-12
CPC Classification: B01D,C10G

Claim Text:
1. An apparatus for making oligomers comprising: an oligomerization zone for oligomerizing olefins in an oligomerization feed stream to produce an oligomerate stream including hydrocarbons; a flash drum for separating said oligomerate stream in communication with said oligomerization zone; a light flash line from the flash drum and a heavy flash line from the flash drum with an inlet to the light flash line above an inlet to the heavy flash line, wherein the heavy flash line is configured and arranged to receive the heaviest hydrocarbons from said oligomerate stream; a fractionation column in communication with said light flash line for fractionating said light flash oligomerate stream; the overhead line from the fractionation column is in upstream communication with the oligomerization zone; said oligomerization zone is in downstream communication with said heavy flash line and wherein said heavy flash line bypasses said fractionation column.