Partial dehydration of cyclohexanone oxime

Details Partial dehydration of cyclohexanone oxime Partial dehydration of cyclohexanone oxime

1974-01-30

1976-03-02

Schwartz, Gerald A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C13104

Patent

active

039418383

ABSTRACT:
A process for the partial dehydration of cyclohexanone oxime by treatment with aqueous solutions of inorganic salts, wherein the crude cyclohexanone oxime is extracted, above its melting point, with a concentrated ammonium salt solution and/or hydroxylammonium salt solution in countercurrent in an extraction column and the salt solution is then separated from the partly dehydrated cyclohexanone oxime, reconcentrated by evaporation and recycled to the oxime dehydration process. The cyclohexanone oxime melt which has been dehydrated to water contents of about 4 to 6% by weight is treated with a heated inert gas above its melting point and the off-gas is washed to remove entrained cyclohexanone oxime.

REFERENCES:
patent: 2820825 (1958-12-01), Hillyer et al.
patent: 3002996 (1961-12-01), Meier et al.

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