Processes for the isomerization of feedstocks comprising...

Details Processes for the isomerization of feedstocks comprising... Processes for the isomerization of feedstocks comprising...

2007-09-07

2009-12-29

Dang, Thuan Dinh (Department: 1797)

Chemistry of hydrocarbon compounds

Saturated compound synthesis

By isomerization

C585S818000

Reexamination Certificate

active

07638676

ABSTRACT:
In an isomerization process where the isomerization effluent (114) is fractionated in a deisohexanizer (116) to provide a lower boiling fraction (122) containing dimethylbutanes, a higher boiling fraction containing methylpentanes and a bottoms stream (120) containing normal hexane and heavies, the bottoms stream is contacted with a selective permeation membrane (124) to provide a normal hexane-containing permeate (128) suitable for recycle to the isomerization. The energy consumption of the deisohexanizer (116) can be reduced without adversely affecting the octane rating of the overhead (122).

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