Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1982-08-27
1984-06-05
Cintins, Ivars C.
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
423181, B01D 1104
Patent
active
044527020
ABSTRACT:
A process for the extraction of cesium ions from an aqueous solution with an adduct compound containing a macrocyclical polyether and an inorganic heteropoly acid component. An organic phase in the form of a solution of an adduct compound in a polar organic solvent is prepared. The adduct compound is the product of a crown ether containing at least one species of the structural elements ##STR1## where, in structure I, n represents one of the numbers 0, 1 or 2, the --C--(C).sub.n --O group forms part of the polyether ring and R.sub.1 is H,CH.sub.3, phenyl up to 4 R.sub.1 (.noteq.H); in structure II, the --C--C--O-- group forms part of the polyether ring and R.sub.2 is H,CH.sub.3, t-butyl, pentyl, heptyl, nonyl, (CH.sub.2).sub.9 Ch.sub.3, phenyl up to 2 R.sub.2 (.noteq.H);and in structure III, the --C.dbd.C--O group forms part of the polyether ring and R.sub.3 is H,CH.sub.3, t-butyl, pentyl, heptyl, nonyl, (CH.sub.2).sub.9 CH.sub.9, phenyl up to 2 R.sub.3 (.noteq.H); with (b) an inorganic heteropoly acid, which is stable in a strongly acid and oxidizing medium, or a salt of the inorganic heteropoly acid. The aqueous solution containing the cesium ions is brought into contact with the adduct compound to extract the cesium from the aqueous phase into the organic phase. The organic phase charged with cesium ions is separated from the aqueous solution.
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Blasius Ewald
Nilles Karl-Heinz
Cintins Ivars C.
Kernforschungszentrum Karlsruhe GmbH
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