Process of removing and concentrating desired ions from solution

Details Process of removing and concentrating desired ions from solution Process of removing and concentrating desired ions from solution

1988-10-07

1990-08-28

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210679, 210688, B01D 1500

Patent

active

049523210

ABSTRACT:
The process of the invention comprises removing and concentrating certain ions, such as the transition metal ions, from solutions thereof admixed with other ions which may be present in much higher concentrations by forming a complex of the desired ion(s) with a compound ##STR1## B and D are each a radical selected from the group of N(R.sup.3), N(R.sup.3)CH.sub.2, O, OCH.sub.2, S and SCH.sub.2, but B or D must be N(R.sup.3) or N(R.sup.3)CH.sub.2 ; E is a radical selected from the group consisting of H, NH(R.sup.3), SH, OH, lower alkyl, and Y and Z are radicals selected from the group of Cl, OCH.sub.3, OC.sub.2 H.sub.5, methyl, ethyl and halogenated substituents thereof, and O-matrix; R.sup.1 is a radical selected from the group consisting of H, SH, OH, lower alkyl and aryl such as phenyl, naphthyl and pyridyl; R.sup.2 is a radical selected from the group consisting of H or lower alkyl; R.sup.3 is a radical selected from the group consisting of H, lower alkyl and aryl such as phenyl, naphthyl and pyridyl; a=2 to about 10; b=1; c=1 to about 2000; d=0 to about 2000.

REFERENCES:
patent: 4659512 (1987-04-01), Macedo et al.

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