Separation of formic acid from dioxane by extractive distillatio

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

1988-12-05

1990-08-14

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, 562609, B01D 340, C07C 5302, C07D31912

Patent

active

049484699

ABSTRACT:
Dioxane cannot be completely removed from dioxane and formic acid mixtures by distillation because of the presence of the maximum azeotrope. Dioxane can be readily removed from dioxane - formic acid mixtures by extractive distillation in which the extractive agent is dimethylformamide, dimethylacetamide or these with certain high boiling organic compounds.

REFERENCES:
patent: 2441114 (1948-05-01), Krieble et al.
patent: 4007095 (1977-02-01), Wolf et al.
patent: 4285881 (1981-08-01), Yang
patent: 4801358 (1989-01-01), Berg et al.

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