Recovery of aprotic amides

Details Recovery of aprotic amides Recovery of aprotic amides

1978-05-22

1982-02-23

Waltz, Thomas A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

564216, C07C103127, C07C10334, C07C10336, C07D20706

Patent

active

043168469

ABSTRACT:
The present invention relates to the recovery of three aprotic amide solvents from their water solutions by extraction with a selected class of organic solvents characterized generally by having two electron withdrawing substituents, exemplified by fluorine and chlorine, located on a carbon atom which also contains a hydrogen atom.

REFERENCES:
patent: 3959371 (1976-05-01), Gaulin et al.
patent: 4013640 (1977-03-01), Somekh
Kuroda et al., CA 79: 105073k, (1973).
Kuroda et al., CA 82: 170665f, (1975).
Suzuki et al., CA 83: 178374b, (1975).
Kozai et al., CA 83: 29716n, (1975).
CRC Handbook of Chem. & Physics, 48th Ed., Weast, pp. C-79, C-327, C-407 and C-527, (1967).
Drago et al., CA 81: 30473w, (1974).
Seliverotov, CA 73: 81270v, (1970).

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