Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1987-03-23
1990-03-20
Spear, Frank
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210511, B01D 1104
Patent
active
049099396
ABSTRACT:
A process for the removal of difficult-to-remove acidic organic compounds from aqueous solutions using novel phosphine oxide mixtures in which mixtures (1) at least two phosphine oxides are present, the total number of carbon atoms in a first oxide being at least 15 and the difference in the total number of carbon atoms in the first and second oxides being present in an amount of at least 5% by weight and not more than 60% by weight or (2) at least four phosphine oxides are present, the total number of carbon atoms in an oxide having at least no. of C atoms being at least 15, said phosphine oxides being present in an amount of at least 1% by weight and not more than 60% by weight. Unexpectedly high extractability is achieved using the mixtures.
REFERENCES:
patent: 4237100 (1980-12-01), Delvalle
patent: 4544779 (1985-10-01), Bright
patent: 4664808 (1987-05-01), Kim
Rickelton William A.
Robertson Allan J.
American Cyanamid Company
Spear Frank
Van Riet Frank M.
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