Process for dehydration of condensation reaction mixtures obtain

Details Process for dehydration of condensation reaction mixtures obtain Process for dehydration of condensation reaction mixtures obtain

1990-10-15

1992-08-11

Manoharan, Virginia

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

203 67, 203 69, 203 87, 203 98, B01D 336

Patent

active

051376059

ABSTRACT:
A process for the dehydration of substances, mixtures, primarily condensation reaction mixtures, (e.g. direct esterification, direct acetal formation, direct ketal formation), performed by continuous azeotropic distillation with an organic solvent forming with water an azeotropic mixture of minimal boiling point and unable to mix with water, carried out in such a way that the distillate is cooled at least to the temperature, at which the condensate with the given water content or the organic phase of the condensate is just supersaturated with respect to water, and the organic phase of lower water content obtained in this way is recycled to the distilling boiler. The organic solvents used are e.g. benzene, toluene, 1,2-dichloroethane, chloroform, carbon tetrachloride.

REFERENCES:
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patent: 3663631 (1972-05-01), Takeya et al.
patent: 3669847 (1972-06-01), Feder et al.
patent: 3687819 (1972-08-01), Levin
patent: 3855077 (1974-12-01), Bieser et al.
patent: 4115208 (1978-09-01), Verstegen

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