Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1989-07-10
1991-01-22
Spear, Frank
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210909, C02F 126
Patent
active
049869175
ABSTRACT:
A process for selectively recovering a nitrophenolic by-product from nitration waste water in substantially pure form by solvent extraction is provided. The pH of the waste water is adjusted using an acid to affect the solubility of a particular nitrophenolic by-product in the waste water so that the by-product is selectively separable from the other components of the nitration waste water by solvent extraction.
REFERENCES:
patent: 4418221 (1983-11-01), Yasuda et al.
patent: 4597875 (1986-07-01), Carr et al.
Adams Earl G.
Bayer Arthur C.
Farmer Alan D.
Hook Brenda J.
Breiner A. W.
First Chemical Corporation
Spear Frank
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