Process and manufacturing equipment for preparing acetals and ketals
AssigneeDsm IP Assets B.V.
InventorsVolkmar Boesch, Juan Ramon Herguijuela, Thomas Clavey
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Abstract
A process for the preparation of acetals and ketals by reacting an aldehyde or ketone with an alcohol in the presence of an acidic catalyst and removing water by pervaporation. Manufacturing equipment for the preparation of acetals and ketones is also provided.
Claims21
A process for the preparation of acetals or ketals which comprises reacting an aldehyde or a ketone with an alcohol in the presence of a solid acid catalyst at a temperature from about −50° C. to about 10° C., and removing water from the reaction product by pervaporation at a temperature from about 60° C. to about 130° C. using a hydrophilic membrane which is polymeric or ceramic.
A process for recovering acetals or ketals from reaction mixtures obtained by reacting aldehydes or ketones with alcohols in the presence of a solid acid catalyst at a temperature from about −50° C. to about 10° C., which process comprises subjecting the reaction mixture containing an acetal or a ketal together with water and urireacted aldehyde or ketone and alcohol to treatment with a solid base, being a weakly basic ion exchange resin, followed by pervaporation at a temperature from about 60° C. to about 130° C. using a hydrophilic membrane which is polymeric or ceramic to remove water from the reaction product.
Dependencies are inferred from the claim text.