Cyclic process for preparing and working up a hydroxylammonium s

Details Cyclic process for preparing and working up a hydroxylammonium s Cyclic process for preparing and working up a hydroxylammonium s

1975-04-01

1976-04-06

Schwartz, Gerald A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C13104

Patent

active

039489884

ABSTRACT:
An improved cyclic process for producing cyclohexanone oxime is provided wherein the circulating reaction medium is subjected to a heat treatment of at least 40.degree.C in the presence of nitrous gases as it circulates between the oxime synthesis zone and the hydroxylamine synthesis zone. The residual cyclohexanone oxime is hydrolyzed to cyclohexanone in said heat treatment in the presence of nitrous gases. The reaction medium is then stripped of cyclohexanone prior to recirculating to the hydroxylamine synthesis zone. In another embodiment of the invention the recirculating reaction mixture is heated to at least 50.degree.C in the presence of nitrous acid as the mixture circulates between the oxime synthesis zone and the hydroxylamine synthesis zone, thus reducing the amount of residual cyclohexanone oxime and cyclohexanone to an insignificant amount.

REFERENCES:
patent: 3429920 (1964-11-01), de Rooij

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