Removal of oxides from alkali metal melts by reductive titration

Details Removal of oxides from alkali metal melts by reductive titration Removal of oxides from alkali metal melts by reductive titration

1978-10-26

1980-09-30

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

23230R, G01N 2726

Patent

active

042253950

ABSTRACT:
Alkali metal oxides dissolved in alkali metal melts are reduced with soluble metals which are converted to insoluble oxides. The end points of the reduction is detected as an increase in electrical resistance across an alkali metal ion-conductive membrane interposed between the oxide-containing melt and a material capable of accepting the alkali metal ions from the membrane when a difference in electrical potential, of the appropriate polarity, is established across it. The resistance increase results from blocking of the membrane face by ions of the excess reductant metal, to which the membrane is essentially non-conductive.

REFERENCES:
patent: 2928774 (1960-03-01), Leisey
patent: 3309233 (1967-03-01), McPheeters et al.
patent: 3679551 (1972-07-01), Kolodney
patent: 3714014 (1973-01-01), Romberger et al.
patent: 3718546 (1973-02-01), Salzano et al.

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