Enhanced distillation of cyclohexanol from phenol with additiona

Distillation: processes – separatory – Adding material to distilland except water or steam per se – Organic compound

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568835, B01D 334

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active

042723264

ABSTRACT:
A process in which a mixture including phenol, cyclohexanone and cyclohexanol is fed to a point intermediate the top and bottom of a distillation column, an overhead stream comprising cyclohexanone and cyclohexanol is withdrawn from a point adjacent the top of the column and a bottoms stream comprising phenol is withdrawn from adjacent the bottom of the column. By feeding additional cyclohexanone to a point below where the mixture is fed, the cyclohexanone content of the bottoms is reduced. The process is useful in separating chemicals used in producing cyclohexanone from phenol for manufacturing caprolactam, a polyamide monomer, or for other purposes.

REFERENCES:
patent: 2857432 (1958-10-01), Joris
patent: 2873296 (1959-02-01), Nilsson et al.
patent: 3592859 (1971-07-01), Marcell
patent: 4187152 (1980-02-01), Roth et al.
Azeotropic Data-II, No. 35, Advances in Chemistry Series, ACS, 1962, p. 50.
Azeotropic Data, No. 6, Advances in Chemistry Series, ACS, 1952, p. 167.
Azeotropic Data-III; Advances in Chemistry Series 116; ACS, 1973, p. 339.

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