Claims
- 1. A process for the recovery of lower carboxylic acids from dilute aqueous solution, comprising:
- contacting said aqueous solution with a water-immiscible, liquid organic solvent for said acid,
- said aqueous solution having a lower carboxylic acid content of two percent or less by weight, said content consisting of one or more two to four carbon mono- or dicarboxylic acids substituted with from zero to three chlorines or fluorines, or with zero or one hydroxyl, oxo, cyano, methoxyl or ethoxyl group, the carbon to oxygen atomic ratio in each of said acids being not less than 1.0 nor greater than 2.0,
- said organic solvent comprising a total of at least one weight percent of one or more polar extractants of the formula: ##EQU7## wherein each R" is a C.sub.1 to C.sub.7 alkyl group and the total number of carbons in the molecule is from 12 to 36,
- and separating the resulting loaded extractant and raffinate solutions.
- 2. The process of claim 1 in which said aqueous solution is a brine containing about 18-20 wt. percent of sodium chloride and about 0.2 wt. percent sodium acetate which has been treated with an amount of hydrochloric acid equivalent to the sodium acetate.
CROSS-REFERENCE TO RELATED APPLICATION
This is a division of application Ser. No. 467,328, filed May 6, 1974 which in turn is a division application Ser. No. 285,546, filed Aug. 31, 1972, now U.S. Pat. No. 3,816,524.
US Referenced Citations (5)
Divisions (2)
|
Number |
Date |
Country |
Parent |
467328 |
May 1974 |
|
Parent |
285546 |
Aug 1972 |
|