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US 5,180,496 AGranted
Unsaturated polyesters and crosslinked membranes therefrom for aromatics/saturates separation
AssigneeExxon Research & Engineering Co.
InventorsGuido Sartori, W. S. Winston Ho, Robert E. Noone
Life of this patent
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Abstract
The present invention describes a method for the synthesis of unsaturated aliphatic polyesters, their crosslinking by thermal treatment and the use of the corresponding 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 polyester diol with an unsaturated diacid chloride, and
- b) selectively permeating the aromatic component of the mixture through the membrane.
Dependencies are inferred from the claim text.