Separation of acetic acid from dioxane by extractive distillatio

Details Separation of acetic acid from dioxane by extractive distillatio Separation of acetic acid from dioxane by extractive distillatio

1988-07-28

1989-01-31

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 56, 203 60, 203 61, 203 62, 203 63, 203 64, 549377, 562608, B01D 340, C07C 5302, C07D31912

Patent

active

048013587

ABSTRACT:
Dioxane cannot be completely removed from dioxane and acetic acid mixtures by distillation because of the presence of the maximum azeotrope. Dioxane can be readily removed from dioxane - acetic acid mixtures by extractive distillation in which the extractive agent is N,N-dimethylacetamide or dimethylformamide, either alone or mixed with certain high boiling organic compounds. Examples of effective agents are N,N-dimethylacetamide; dimethylformamide and heptanoic acid; N,N-dimethylacetamide, heptanoic acid and diethylene glycol diethyl ether.

REFERENCES:
patent: 2441114 (1948-05-01), Krieble et al.
patent: 4007095 (1977-02-01), Wolf et al.
patent: 4336195 (1982-06-01), Renga

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