Method for evaporating cyclohexanone oxime

Details Method for evaporating cyclohexanone oxime Method for evaporating cyclohexanone oxime

2006-07-04

2006-07-04

Killos, Paul J. (Department: 1625)

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

Organic compounds

Amino nitrogen containing

Reexamination Certificate

active

07071360

ABSTRACT:
A method is provided for evaporating cyclohexanone oxime in which cyclohexanone oxime is evaporated using a falling-film evaporator with wetting the evaporation surface of the evaporator well with the cyclohexanone oxime at a pressure of less than about 1060 Torr with a falling rate of the cyclohexanone oxime of about 170 kg/hour or more per one meter around the circumference of evaporation surface at the lowest part of the evaporator. In this method, the cyclohexanone oxime is evaporated efficiently with little decomposition thereof, while preventing the plugging of the pipes of the evaporator and continuously carrying out the operation of the evaporator for a long period of time.

REFERENCES:
patent: 3210338 (1965-10-01), Huber et al.
patent: 4137263 (1979-01-01), Immel et al.
patent: 4268440 (1981-05-01), Werther et al.
patent: 1126358 (1962-03-01), None
patent: 0550965 (1993-07-01), None
patent: 378290 (1964-07-01), None

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