Extraction of carboxylic acids from dilute aqueous solutions

Details Extraction of carboxylic acids from dilute aqueous solutions Extraction of carboxylic acids from dilute aqueous solutions

1975-11-04

1976-09-14

Garner, Vivian

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604654, 260485S, 260526N, 260526R, 260535R, 260537N, 260537R, 260539A, 260539R, 260540, 260541, C07C 5148, C07C121407

Patent

active

039807010

ABSTRACT:
Mono or dicarboxylic acids containing from two to four carbon atoms are extracted from dilute aqueous solutions with an organic liquid comprising one or more of the following extractants: dialkyl alkyl phosphonates, alkyl dialkyl phosphinates, trialkyl phosphine oxides, dialkyl alicyclic amidophosphates, dialkyl sulfoxides and tetralkyl ureas. An improved method for removing carboxylic acid contaminants from aqueous effluents or recycle streams is provided.

REFERENCES:
patent: 2437519 (1948-03-01), Guinot et al.
patent: 2480380 (1949-08-01), Nicholl et al.
patent: 2574256 (1951-11-01), Flisik et al.
patent: 3470238 (1969-09-01), Asano

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