Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1979-12-03
1981-08-18
Schain, Howard E.
Liquid purification or separation
Processes
Ion exchange or selective sorption
210698, 210912, 521 35, 521 37, 521 39, 525505, 528158, 528162, 528163, C02F 142, C02F 164, C08G 1406, C08G 1412
Patent
active
042845122
ABSTRACT:
Ferric ions may be removed very selectively from aqueous solutions by means of a metal-chelating resin consisting of the acid-quaternized form of a cross-linked polymer produced by the condensation of a phenolic component comprising one or more phenols, formaldehyde, and a diamino component comprising one or more di-(secondary amino) compounds under neutral conditions. The resin is prepared by treating the cross-linked polymer with an aqueous solution of a strong mineral acid.
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J. Macromol Science-Chem., A10 (1 & 2), pp. 309-337 & 354-365, Ramirez et al.
Commonwealth Scientific and Industrial Research Organization
Schain Howard E.
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