Distillation of higher alcohols of 6-20 carbon atoms containing

Details Distillation of higher alcohols of 6-20 carbon atoms containing Distillation of higher alcohols of 6-20 carbon atoms containing

1984-10-19

1987-02-24

Bashore, S. Leon

Distillation: processes, separatory

Plural distillations performed on same material

One a distillation under positive pressure or vacuum

203 18, 203 63, 203 80, 203 99, 203DIG19, 203DIG23, 203DIG25, 568913, B01D 336

Patent

active

046455701

ABSTRACT:
For the distillation of a stream consisting essentially of alcohols of 6-20 carbon atoms, water and methanol, the methanol is first separated from the homogeneous, aqueous solution as the overhead product by distillation under a head pressure of 500-1,000 mbar. The bottoms discharge is mechanically separated under normal pressure and at a temperature of 5.degree.-95.degree. C. in a phase separator to obtain a discrete water phase preferably containing at least two thirds of the feedstream water. The remaining organic phase is then transferred from the phase separator into a second distillation column and the organic phase is dewatered in the latter at 100-500 mbar. The head product from the second column is conducted to a second phase separator; the aqueous phase is separated therein at a temperature of 5.degree.-95.degree. C. and optionally returned into the first phase separator. The bottom product from the second distillation column is passed into a downstream distillation stage wherein the C.sub.6 to C.sub.20 alcohols are separated into fractions thereof.

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The Chemical Abstract Reference CA 88 (1978): 52282e.
Buchold, "Natural Fats & Oils Route to Fatty Alcohols", Chemical Engineering; Feb. 21, 1983, pp. 42 & 43.

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