Patent ID: 8052945

Claim:
An apparatus for oligomerizing light olefins and recovering product oligomers comprising: a first oligomerization reactor vessel including a feed inlet for delivering light olefins to the reactor vessel and a first product outlet for removing light olefins and product oligomers from said first oligomerization reactor vessel; a first product line with a first end in fluid communication with said first product outlet of said first oligomerization reactor vessel and a second end in communication with a fractionation column; a feed line with a first end in fluid communication with a side cut outlet of said fractionation column and a second end in fluid communication with an inlet to a second oligomerization reactor vessel; a second product outlet for removing light olefins and product oligomers from said second oligomerization reactor vessel; and a return line with a first end in fluid communication with said second product outlet and a second end in fluid communication with said fractionation column.