Low-rinse, high-capacity, weakly basic acrylic ion exchange resin
AssigneeRohm and Haas Company
InventorsMichael P. Bigwood, John O. Naples
Life of this patent
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Abstract
Copolymers of acrylonitrile with aliphatic cross-linkers having two or more unconjugated vinylic groups are functionalized with polyamines to form weakly basic anion exchange resins having both low rinse-volume requirements and high anion exchange capacity.
Claims18
A weakly basic anion exchange resin having low rinse-volume requirements and high anion exchange capacity, which comprises a copolymer of acrylonitrile with an aliphatic crosslinking monomer having two or more unconjugated allylic groups, functionalized with a polyamine.
A process for preparing a weakly basic anion exchange resin having low rinse-volume requirements and high anion exchange capacity, which comprises functionalizing, at a temperature of from about 100.degree. to about 200.degree. C. for from about 5 to about 20 hours, a copolymer of acrylonitrile and an aliphatic crosslinking monomer having two or more unconjugated allylic groups, with a polyamine.
A process for removing anions from a liquid which comprises contacting the liquid with a weakly basic anion exchange resin comprising a copolymer of acrylonitrile with an aliphatic crosslinking monomer having two or more unconjugated allylic groups, functionalized with a polyamine.
Dependencies are inferred from the claim text.