Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1973-04-19
1976-01-06
Hart, Charles N.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 37, 423367, B01D 1506
Patent
active
039310043
ABSTRACT:
Ferricyanide ions and/or ferrocyanide ions are removed effectively from a photographic reducer or waste liquid containing them by contacting the waste liquid with a weakly basic anion exhange resin in the presence of ammonium ions and thiosulfate ions.
REFERENCES:
patent: 2688000 (1954-08-01), Kressman et al.
patent: 3232867 (1966-02-01), Abrams
patent: 3253920 (1966-05-01), Rees et al.
patent: 3293036 (1966-12-01), Mekl et al.
patent: 3429835 (1969-02-01), Odland
patent: 3634088 (1972-01-01), Cooley
patent: 3667950 (1972-06-01), Amano et al.
Chemical Abstracts: Vol. 72, 1970, 59556a; Vol. 69, 1968, 80027b; Vol. 70, 1969, 23149a; Vol. 66, 1967, 32248r.
Photographic Processing Chemistry, 1966, The Focal Library, Mason, p. 212.
Iwano Haruhiko
Shimamura Isao
Fuji Photo Film Co. , Ltd.
Hart Charles N.
Spitzer Robert H.
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