Processes for the isomerization of paraffins of 5 and 6 carbon atoms with methylcyclopentane recovery
US7638674B2 · kind B2 · utility
4Cited by
27References
12Claims
0Family size
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Key dates
| Filing date | Sep 7, 2007 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Mar 16, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/0004
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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 C6 Permeate Flow Index of at least 0.01 and a C6 Permeate Flow Ratio of at least 1.25:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.