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US 9,878,321 B2Granted
Materials and methods for the selective recovery of multivalent products
AssigneeInvista North America S.A.R.L.
InventorsMariusz Kamionka, Alex Conradie
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Abstract
Described herein are processes and apparatus for the high purity and high concentration recovery of multivalent products via continuous ion exchange from aqueous solutions for further down-stream purification.
Claims10
A method of recovering multivalent products from aqueous solutions using continuous ion exchange comprising:
- (a) adsorbing the multivalent product comprising diamine chosen from putrescine, cadaverine, hexamethylenediamine, and heptamethylenediamine, principally as a divalent species onto an ion exchange resin;
- (b) converting the adsorbed multivalent product to principally the monovalent valence state;
- (c) concentrating the multivalent product through re-adsorption onto the ion exchange resin;
- and
- (d) eluting the multivalent product.
2 more elements
Dependencies are inferred from the claim text.