Process for producing chelating resin and product produced there

Details Process for producing chelating resin and product produced there Process for producing chelating resin and product produced there

1975-03-20

1977-06-28

Pertilla, Theodore E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

210 24, 260 2N, 260 21R, 260 292EP, 260 47EN, 260830P, 260DIG6, 423 24, 423 89, 423100, C08G 3014

Patent

active

040324826

ABSTRACT:
A process for producing a spherical chelating resin is disclosed. In the production, a prepolymer is prepared in the absence or presence of a solvent by subjecting a poly-N-substituted polyamine having at least two residual active hydrogen atoms bonded to nitrogen atoms or a poly-N-substituted polyalkylene imine having at least two residual active hydrogen atoms bonded to nitrogen atoms to a poly-addition reaction with an epoxy compound having at least two epoxy groups. The prepolymer is cured by heating and agitating a suspension of the prepolymer in an aqueous solution of a water-soluble high polymer or a nonionic surfactant in the absence or presence of known curing agents for epoxy resins. The resulting spherical cured resin is subjected to a saponification reaction or to a reaction with a hydrazine or a polyamine, and then a spherical chelating resin is obtained.

REFERENCES:
patent: 3414550 (1968-12-01), D'Alelio
patent: 3635842 (1972-01-01), Longoria

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