Apparatus for oligomerizing light olefins

摘要

Disclosed is a process and apparatus for switching oligomerization feed between a first oligomerization zone that includes a uni-dimensional small pore zeolite to make more diesel and a second oligomerization zone that includes SPA catalyst for making more gasoline. The diesel can be recycled to make more propylene. The process and apparatus will provide refiners with flexibility to produce the most valuable product commensurate with fluctuating market conditions.

主权项

1. An oligomerization apparatus for producing gasoline and distillate comprising:
an oligomerization feed line for feeding oligomerization feed to an oligomerization zone; a split on said oligomerization feed line providing a first oligomerization feed conduit and a second oligomerization feed conduit; a first oligomerization reactor zone in communication with said first oligomerization feed conduit and a second oligomerization reactor zone in communication with said second oligomerization feed conduit; a bed of zeolitic catalyst in said first oligomerization reactor zone; a bed of solid phosphoric acid catalyst in said second oligomerization reactor zone a recovery zone in communication with said first oligomerization zone and said second oligomerization zone; a debutanizer column in said recovery zone; and an oligomerate return line in communication with said debutanizer column and said first oligomerization reactor zone, wherein said first oligomerization reactor zone is in upstream and downstream communication with said debutanizer.