Cyclohexanone distillation process

Details Cyclohexanone distillation process Cyclohexanone distillation process

1980-07-03

1981-12-22

Sever, Frank

Distillation: processes, separatory

Plural distillations performed on same material

One a distillation under positive pressure or vacuum

203 80, 203DIG19, 568366, B01D 314

Patent

active

043069444

ABSTRACT:
An improved process of distilling a cyclohexanone-rich overhead stream in a first still from a feed mixture comprising cyclohexanone, phenol and cyclohexanol of the type wherein a cyclohexanone-rich stream is withdrawn as a part of an overheads condensate from the first still and a phenol-rich stream is withdrawn as a part of a reboiled bottom stream from the first still. The improvement includes withdrawing a side stream substantially free of phenol from above the point where the feed mixture is fed to the first column and separating the side stream in a second still into a second cyclohexanone-rich overhead stream and a bottom stream containing cyclohexanone and cyclohexanol. The second cyclohexanone-rich stream may be returned to the first still.

REFERENCES:
patent: 4158611 (1979-06-01), Cooke
"Chemical Engineer's Handbook", Perry; 4th ed; 1963.

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