PROCESS AND APPARATUS FOR RECOVERING OLIGOMERATE

摘要

A process and apparatus uses a flash drum to separate light hydrocarbons from heavy oligomerate from an oligomerization zone. The heavy oligomerate can bypass a fractionation column in the oligomerate recovery section and be recycled to the oligomerization zone or other zones. Costs are saved by avoiding repeatedly transporting and processing the heavier recycled oligomerate.

主权项

1. A process for making oligomers comprising:
passing an oligomerization feed stream to an oligomerization zone to oligomerize olefins in said oligomerization feed stream to produce an oligomerate stream; separating said oligomerate stream from said oligomerization zone in a flash drum to provide a light flash oligomerate stream and a heavy flash oligomerate stream; fractionating said light flash oligomerate stream in a recovery zone; and recycling at least a portion of said heavy flash oligomerate stream to said oligomerization zone.