Processes for the isomerization of paraffins of 5 and 6...

Details Processes for the isomerization of paraffins of 5 and 6... Processes for the isomerization of paraffins of 5 and 6...

2007-09-07

2009-12-29

Dang, Thuan Dinh (Department: 1797)

Chemistry of hydrocarbon compounds

Saturated compound synthesis

By isomerization

C585S818000

Reexamination Certificate

active

07638674

ABSTRACT:
In an isomerization process where the isomerization effluent (108) is fractionated in a deisohexanizer (116) to provide an overhead (118) containing dimethylbutanes and a higher boiling fraction (122) containing normal hexane, the higher boiling is contacted with a selectively permeable membrane (124) to provide a retentate containing methylcyclopentane (128). If desired, the normal hexane-containing permeate can be recycled for isomerization. The preferred membranes are sieving membranes having a C6Permeate Flow Index of at least 0.01 and a C6Permeate Flow Ratio of at least 1.25:1.

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