Azeotropic dehydration distillation process

Details Azeotropic dehydration distillation process Azeotropic dehydration distillation process

1983-06-20

1986-04-15

Bascomb, Wilbur

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

203 18, 203 19, 203 63, 203 67, 562608, 568916, B01D 336

Patent

active

045825700

ABSTRACT:
Improvement in an azeotropic distillation process, the improvement being the use of an entrainer characterized in that it is an organic compound in which one or more hydrogen atoms are replaced by halogen atoms, including at least one fluorine atom; it is miscible, under process conditions, with the organic compound being dehydrated; its volatility is sufficiently close to the volatility of the organic compound being dehydrated such that, under the process conditions, it forms an azeotrope with the organic compound; it is less miscible, under process conditions, with water than is the corresponding organic compound in which the halogen atoms are replaced with hydrogen atoms; and it is chemically stable under the process conditions.

REFERENCES:
patent: 1676735 (1928-07-01), Keyes
patent: 2028801 (1936-01-01), Othmer
patent: 3433788 (1969-03-01), Somekh et al.
patent: 4217178 (1980-08-01), Katzen et al.
patent: 4246073 (1981-01-01), Umeda et al.
patent: 4358536 (1982-11-01), Thorsson et al.

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