Process for removing impurities from the mixture of cyclohexanon

Details Process for removing impurities from the mixture of cyclohexanon Process for removing impurities from the mixture of cyclohexanon

1991-03-22

1992-12-08

Bascomb, Jr., Wilbur

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203 78, 203 80, 203 84, 568366, 568376, 568836, B01D 314, C07C 3508, C07C 4582

Patent

active

051689839

ABSTRACT:
A process for separating cyclohexanol and other impurities from a mixture containing cyclohexanone and cyclohexanol is disclosed. In this process a mixture of cyclohexanone and cyclohexanol are introduced into a first distillation column from which low-boiling components are distilled; the bottoms of the first distillation column are then fed to a second distillation column from which cyclohexanone is distilled; the bottoms of the second distillation column are fed to a third distillation column from which cyclohexanol and other impurities are removed; and the distillate of the third distillation column is then circulated into the first distillation column via a dehydrogenation zone; wherein the pressures at the tops of the first, second, and third distillation columns are maintained at 20 to 400 Torr; part of the bottoms of the second distillation column is supplied to a fourth distillation column having a pressure at the top of 500 to 2,500 Torr, and from which low-boiling components are removed; the distillate of the fourth distillation column is circulated into either the first distillation column, the second distillation column, the third distillation column or the dehydrogenation zone; and the bottoms of the third and fourth distillation columns are not circulated.

REFERENCES:
patent: 2873296 (1959-02-01), Nilsson et al.
patent: 3275692 (1966-09-01), Poehler et al.
patent: 3946076 (1976-03-01), Paasen et al.
patent: 4326085 (1982-04-01), De Cooker

Affiliated with

Also associated with

Rating

Process for removing impurities from the mixture of cyclohexanon does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for removing impurities from the mixture of cyclohexanon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for removing impurities from the mixture of cyclohexanon will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-955715