Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1978-05-24
1980-12-16
Waltz, Thomas A.
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
2604299, 2604381, 260439R, 260465E, 423 24, 423100, 423139, 252182, C07C14378, C07C14379, B01D 1104
Patent
active
042396999
ABSTRACT:
Certain sulfonamidophenols, metal complexes thereof and solutions of said compounds in essentially water-immiscible, liquid hydrocarbon solvents are disclosed. The sulfonamidophenols have the structural formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are as defined in the specification and claims hereof. Particular metal values are recovered from their aqueous solutions by using sulfonamidophenols dissolved in essentially water-immiscible liquid hydrocarbon solvents. The extraction process involves contacting the metal value containing aqueous solution with the solution of sulfonamidophenol in essentially water-immiscible liquid hydrocarbon solvent and stripping the metal values from the loaded organic phase.
REFERENCES:
patent: 3179669 (1965-04-01), Ursprung
patent: 3818078 (1974-06-01), Bard
patent: 3928355 (1975-12-01), Lee
patent: 3954936 (1976-05-01), Shozda
patent: 4013621 (1977-03-01), Knell
patent: 4160807 (1979-07-01), Virnig et al.
Gordinskii et al., CA 61:8229g (1964).
Titov et al., CA 77:5220w (1972).
Henkel Corporation
Span Patrick J.
Waltz Thomas A.
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