Process for the purification of a C.sub.2 to C.sub.4 carboxylic

Details Process for the purification of a C.sub.2 to C.sub.4 carboxylic Process for the purification of a C.sub.2 to C.sub.4 carboxylic

1996-08-09

1998-09-29

Gorgos, Kathryn L.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

2041576, 2041582, 20415821, 562497, 562520, 562517, 562608, C07C 5100, C07C 100, C07C 5142

Patent

active

058141936

ABSTRACT:
A process for the purification of a C.sub.2 to C.sub.4 carboxylic acid and/or an anhydride thereof having halide impurities, which process comprises the steps of (a) exposing the impure acid and/or anhydride to electromagnetic radiation under conditions of intensity, wavelength and temperature, and for a time, sufficient to convert at least a portion of the halide impurities to lower--and/or higher-boiling halide components and (b) separating the lower--and/or higher-boiling halide components formed in step (a) from the C.sub.2 to C.sub.4 carboxylic acid and/or anhydride. Also, a process for the purification of a C.sub.2 to C.sub.4 carboxylic acid and/or anhydride thereof prepared by a carbonylation process, the acid and/or anhydride thereof having a non-halide, non-acidic and/or non-anhydride impurities, which process comprises the steps of (a) exposing the impure acid and/or anhydride to electromagnetic radiation under conditions of intensity, wavelength and temperature, and for a time, sufficient to convert at least a portion of the non-halide, non-acidic and/or non-anhydride impurities to lower-and/or higher-boiling non-halide, non-acidic and/or non-anhydride components and (b) separating the lower-and/or higher-boiling non-halide, non-acidic and/or non-anhydride components formed in step (a) from the C.sub.2 to C.sub.4 carboxylic acid and/or anhydride.

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"Removal of Iodoorganic Compounds from Kerosene in Nuclear Fuel Reprocessing"; J. Radioanal. Nucl. Chem. Letters; O. Kindel et al.; No. 176 (3), pp. 251-259; .COPYRGT.1993.

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