The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 29, 2009
Filed:
Sep. 07, 2007
Lynn H. Rice, Arlington Heights, IL (US);
David J. Shecterle, Arlington Heights, IL (US);
Lynn H. Rice, Arlington Heights, IL (US);
David J. Shecterle, Arlington Heights, IL (US);
UOP LLC, Des Plaines, IL (US);
Abstract
In an isomerization process where the isomerization effluent () is fractionated in a deisohexanizer () to provide an overhead () containing dimethylbutanes and a higher boiling fraction () containing normal hexane, the higher boiling is contacted with a selectively permeable membrane () to provide a retentate containing methylcyclopentane (). If desired, the normal hexane-containing permeate can be recycled for isomerization. The preferred membranes are sieving membranes having a CPermeate Flow Index of at least 0.01 and a CPermeate Flow Ratio of at least 1.25:1.