Recovery of water miscible organic acids from aqueous solution a

Details Recovery of water miscible organic acids from aqueous solution a Recovery of water miscible organic acids from aqueous solution a

1980-12-09

1984-04-10

Garner, Vivian

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

549231, 549233, 549256, 560129, 560147, 560155, 560174, 560179, 560204, 560217, 560218, 560226, 560234, 560248, 562513, 562530, 562540, 562577, 562580, 562593, 562606, C07C 6703, C07C 6708, C07C 6754, C07C 6758, C07C 6760, C07C 69003

Patent

active

044423039

ABSTRACT:
In one of its embodiments this invention provides a process for recovering C.sub.4 -C.sub.6 dicarboxylic acid components contained in a waste byproduct stream derived from a reaction system in which adipic acid is produced by nitric acid oxidation of cyclohexanone/cyclohexanol.
An important aspect of the process is the esterification and extraction of the C.sub.4 -C.sub.6 dicarboxylic acids in the aqueous byproduct stream with a mixture of C.sub.1 -C.sub.3 alkanol and C.sub.6 -C.sub.20 alkanol, and the subsequent recovery of di(C.sub.6 -C.sub.20 alkyl) esters of succinic acid, glutaric acid and adipic acid.
In a broader aspect this invention provides a process for recovery of water miscible organic acid components contained in an aqueous solution as C.sub.6 -C.sub.20 alkyl esters of the organic acids.

REFERENCES:
patent: 3859335 (1975-01-01), Schindlbauer et al.
patent: 3896159 (1975-07-01), Kratzer et al.
patent: 4076948 (1978-02-01), Mims
patent: 4105856 (1978-08-01), Newton

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