Basf Aktiengesellschaft

Otto Leman

Rudolf Kummer

Heinz-Walter Schneider

Friedrich Wirth

Paul Panitz

Joachim Wagner

Paul Hornberger

Wolfgang Kube

Dieter Karau

C.sub.1 -C.sub.4 -alkyl pentenoates are obtained from reaction mixtures which contain this and which are obtained by reacting butadiene, or a butadiene-containing hydrocarbon mixture, with carbon monoxide and a C.sub.1 -C.sub.4 -alkanol, in the presence of a cobalt carbonyl catalyst and a tertiary nitrogen base at elevated temperatures and under superatmospheric pressure by a process in which

Obtaining C.sub.1 -C.sub.4 -alkyl pentenoates by distillation

Process for the recovery of phthalic anhydride in which gases as obtained in the catalytic atmospheric oxidation of o-xylene or naphthalene are treated with a hydrocarbon containing C.sub.26.sub.- paraffins, cooling, if necessary, the hydrocarbon laden with phthalic anhydride, separating the solid phthalic anhydride followed by melting and distillation thereof.

Recovery of phthalic anhydride

Growing community of inventors

Ludwigshafen, Germany

Otto Leman