Basf Aktiengesellschaft

Heinrich Reitz

Peter Magnussen

Gunter Schuch

Volker Schumacher

Paul Panitz

Werner Praetorius

Wilfried Seyfert

Wolfgang Gebert

A process for the continuous preparation of alkyl pentenoates comprises the following steps:

Continuous preparation of alkyl pentenoates

In a process for the continuous preparation of adipic acid by hydrolysis of C.sub.1 -C.sub.4 -alkyl adipates with water at an elevated temperature in the presence of a strongly acidic ion exchanger, the improvement that the esters and excess water are fed to the middle section of a column, reaction mixture is taken off at a plurality of trays of the column below the feed point, passed over a strongly acidic ion exchanger and recycled, alkanols or alkanol/water mixtures are taken off at the top of the column and an aqueous solution of adipic acid is taken off at the bottom of the column.

Continuous preparation of adiptic acid

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Mannheim, Germany

Heinrich Reitz