Dsm IP Assets B.v.

Thomas Clavey

Juan Ramon Herguijuela

Werner Bonrath

Volkmar Boesch

Michael Thomann

Peter Wasserscheid

Peter Schulz

Ingolf Gummin

The present invention is concerned with a process for preparing acetals and ketals which comprises (i) reacting an aldehyde or ketone with an alcohol in the presence of a solid acid at a temperature of below &#x2212;40&#xb0; C., and (ii) removing water and lower aliphatic alcohol and/or sugar alcohol from the reaction product by pervaporation.

Process for preparing acetals and ketals

The process of the present invention comprises reacting an aldehyde or ketone with an alcohol in the presence of a solid acid, and removing water and methanol from the reaction product by pervaporation, characterized in that a membrane having a flux density for water of 0.04 to 2.8 kg/(hm) is used to remove the water and another membrane having a flux density for methanol of 2.0 to 100 kg/(hm) is used to remove the methanol.

Process for preparing or recovering acetals or ketals by means of pervaporation

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.

Process and manufacturing equipment for preparing acetals and ketals

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Basel, Switzerland

Thomas Clavey