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US 5,177,296 AGranted
Saturated polyesters and crosslinked membranes therefrom for aromatics/saturates separation
AssigneeExxon Research & Engineering Co.
InventorsGuido Sartori, W. S. Winston Ho, Bruce H. Ballinger
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Abstract
The present invention describes a method for the synthesis of saturated aliphatic polyesters by reaction of saturated or aromatic diacid chlorides with oligomeric aliphatic polyester diols, a method to thermally crosslink membranes prepared from the above saturated aliphatic polyesters, and the use of the crosslinked membranes to separate aromatics from saturates.
Claims4
A method for separating mixtures of aromatics and non-aromatics into aromatic-enriched and non-aromatic-enriched streams comprising:
- a) contacting said aromatics/non-aromatics mixture with one side of a crosslinked membrane prepared by reacting an oligomeric aliphatic polyester diol with a saturated or aromatic diacid chloride, and
- b) selectively permeating the aromatic components of the mixture through the membrane.
Dependencies are inferred from the claim text.