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AssigneeUop LLC
InventorSanti Kulprtahipanja
Estimating the term…
A process for the separation of one or more hydroxy paraffinic dicarboxylic acids from a feed mixture comprising said acid(s), and one or more olefinic dicarboxylic acids which process employs an adsorbent comprising a non-zeolitic, hydrophobic, crystalline silica molecular sieve material, to selectively reject the hydroxy paraffinic dicarboxylic acid(s) to a raffinate stream for the ultimate recovery of a purified quantity of such acid(s). The olefinic dicarboxylic acid(s) are thereafter removed from the adsorbent by contacting the adsorbent with a desorbent material and said acid(s) is (are) recovered to an extract stream. In a preferred embodiment the process uses a silicalite adsorbent, aqueous acetone desorbent and a simulated moving-bed countercurrent flow system utilizing therein a pre-pulse technique.
A process for separating hydroxy paraffinic dicarboxylic acids from a feed mixture comprising, one or more hydroxy paraffinic dicarboxylic acids and one or more olefinic dicarboxylic acids, which process comprises contacting, at adsorption conditions, said feed mixture with an adsorbent material comprising a hydrophobic, non-zeolitic, crystalline silica, to effect the adsorption of the olefinic dicarboxylic acids and thereby rejecting to a raffinate stream a purified quantity of the hydroxy paraffinic dicarboxylic acids.
A process for separating hydroxy paraffinic dicarboxylic acids from a feed mixture comprising, one or more hydroxy paraffinic dicarboxylic acids and one or more olefinic dicarboxylic acids, employing an adsorbent comprising a non-zeolitic, hydrophobic, crystalline silica material, which process comprises the steps of:
Dependencies are inferred from the claim text.