| PATENT ASSIGNEE'S COUNTRY | France |
| UPDATE | 06.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
- Feeding mixt to a distn column feedpoint to separate an overhead distillate & bottom residue - Withdrawing from column a sidestream having a benzene content richer than distillate & residue - Passing sidestream to permeation zone comprising a mem brane selective for permeation of benzene to separate a retentate low in benzene & benzene enriched permeate, dividing part of retentate into 2 streams & recycling the divi ded streams to 2 different levels in distn column |
| PATENT PHOTOCOPY | Available on request |
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