Process for the vigorous dehydration of substances,...

Details Process for the vigorous dehydration of substances,... Process for the vigorous dehydration of substances,...

B - Operations, Transporting

01

D

202/56

B01D 3/36 (2006.01) C07C 41/58 (2006.01)

Patent

CA 1325994

PROCESS FOR THE VIGOROUS DEHYDRATION OF SUBSTANCES, MIXTURES, PRIMARILY CONDENSATION REACTION MIXTURES, BY AZEOTROPIC DISTILLATION A b s t r a c t The invention relates to a process for the vigorous dehydration of substances, mixtures, primarily condensa- tion reaction mixtures, (e.g. direct esterification, direct acetal formation, direct ketal formation), per- formed by continuous azeotropic distillation with an organic solvent forming with water an azeotropic mixture of minimal boiling point and unable to mix with water, realized in such a way that the condensing 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 in respect of water, and the organic phase of lower water content obtained this way is recycled to the distilling boiler. The organic solvents used are e.g. benzene, toluene, 1,2-dichloro- ethane, chloroform, carbon tetrachloride.

611236

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