Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ion-exchange polymer or process of preparing
Patent
1978-05-23
1980-02-26
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Ion-exchange polymer or process of preparing
75101BE, 521162, 521163, 423 24, 423100, 521150, B01D 1504, C06G 1406
Patent
active
041907094
ABSTRACT:
Mercury and copper ions may be removed very selectively from aqueous solutions by means of a metal-chelating resin consisting of a 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 condensing approximately equimolar quantities of a phenolic component comprising one or more phenols, and a diamino component comprising one or more di-(secondary amino) compounds with approximately twice the molar quantity of formaldehyde under Mannich reaction conditions.
REFERENCES:
patent: 2382238 (1945-08-01), Laufenberg et al.
patent: 2402384 (1946-06-01), Eastes
patent: 3725480 (1973-04-01), Traise et al.
patent: 3976571 (1976-08-01), Rio
Commonwealth Scientific and Industrial Research Organization
Kulkosky Peter F.
Schofer Joseph L.
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