Removal of thiosulfate from hydrosulfite solutions

Details Removal of thiosulfate from hydrosulfite solutions Removal of thiosulfate from hydrosulfite solutions

1991-07-22

1992-05-12

Niebling, John

Chemistry: electrical and wave energy

Processes and products

204130, C25B 114

Patent

active

051124521

ABSTRACT:
A process for treating an alkali metal hydrosulfite solution containing thiosulfate ions as an impurity which comprises reducing cathodically the alkali metal hydrosulfite solution to convert thiosulfate ions to sulfide ions, the alkali metal hydrosulfite solution having a residual alkalinity of from about 0.1 to about 20 grams per liter of hydroxide ion.

REFERENCES:
patent: 4470888 (1984-09-01), Wheaton
patent: 4740287 (1988-04-01), Cawlfield
patent: 4761216 (1988-08-01), Cawlfield
patent: 4793906 (1988-12-01), Bolick et al.
patent: 4976835 (1990-12-01), Diaddario, Jr. et al.
patent: 5034202 (1991-07-01), Knollmueller

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