Separation of ketone isomers by extractive distillation

Details Separation of ketone isomers by extractive distillation Separation of ketone isomers by extractive distillation

1991-06-28

1992-09-15

Bascomb, Jr., Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 57, 203 58, 203 60, 203 62, 203 63, 203 64, 568410, B01D 340, C07C 4583

Patent

active

051475120

ABSTRACT:
The higher boiling ketone isomers are difficult to separate one from another by conventional distillation or rectification because of the close proximity of their boiling points. Ketone isomers can be readily separated from each other by extractive distillation. Typical examples of effective agents are: for 3-pentanone from 2-pentanone, dipropylene glycol; 3-hexanone from 2-hexanone, butoxypropanol; 3-heptanone from 2-heptanone, 50% ethylene glycol--50% butoxypropanol; 3-octanone from 2-octanone, ethylene glycol diacetate.

REFERENCES:
patent: 2010384 (1935-08-01), Van Melsen et al.
patent: 2245945 (1941-06-01), Van Dijck et al.
patent: 2288281 (1942-06-01), Huijser et al.
patent: 3493618 (1970-02-01), Fuhrmann
patent: 4793901 (1988-12-01), Berg et al.

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