Ethyleneimine-containing resins, manufacture, and use for chemic

Details Ethyleneimine-containing resins, manufacture, and use for chemic Ethyleneimine-containing resins, manufacture, and use for chemic

1997-08-07

2000-11-28

Padmanabhan, Sreeni

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564 81, C07C31116

Patent

active

061537950

ABSTRACT:
Water-insoluble polymer resins containing ethylenediamine subunits which are N-substituted with a functional group chosen from the group consisting of --H, --CS.sub.2, --CH.sub.2 PO.sub.3 H, and --CH.sub.3, or which are N-quarternized as --[N(CH.sub.3).sub.2.sup..sym..crclbar. OH]--, and polysalts of these. The use of such resins in separating nitrites, organic chlorine compounds, (heavy) metal ions including radioactive metal ions, counteranions of metal ions, and aliphatic and aromatic aldehydes from dilute aqueous solutions, especially at low concentrations. A method of synthesizing epoxy carbamate resins without violent reaction by inverse suspension condensation in cold liquid paraffin or toluene, preferably with dimethyl formamide or 1-methyl-2-pyrrolidone as co-solvents.

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