Basf Aktiengesellschaft

Volker Taglieber

Rudolf Kummer

Heinz-Walter Schneider

Franz-Josef Weiss

Wolfgang Hoelderich

Wolf D Mross

Guenter Saladin

Franz-Josef Weis

Amines are prepared from an olefin and ammonia or a primary and/or secondary amine in the presence of a zeolite catalyst of the pentasil type. Iron silicate zeolites of the pentasil type having an SiO.sub.2 /Fe.sub.2 O.sub.3 ratio greater than or equal to 10 are preferably used.

Preparation of tert-butylamine from isobutene

Amines are prepared from an olefin and ammonia or a primary or secondary amine, or a mixture of these, in the presence of a borosilicate or borogermanate zeolite of the pentasil type as a catalyst, by a process in which the amine obtained is isolated from the reaction mixture, and unreacted starting materials are recycled.

Production of amines from an olefin and ammonia or a primary or

.delta.-Formylvalerates are prepared by a process wherein a 3-pentenoate is treated with an isomerization catalyst at elevated temperatures and a 4-pentenoate is distilled off, and the resulting 4-pentenoate is reacted with carbon monoxide and hydrogen at from 80 to 160.degree. C. under from 1 to 30 bar in the presence of a rhodium carbonyl complex which has been modified with tertiary organic phosphines or phosphites.

Preparation of .delta.-formylvalerates

Carboxylates which contain aldehydes, acetals and/or unsaturated compounds and are obtained by reacting an olefinically unsaturated compound with carbon monoxide and an alkanol are purified by a process wherein the said carboxylates are treated with hydrogen at elevated temperatures in the presence of an acidic ion exchanger or zeolite doped with one or more metals of group VIII of the periodic table, and the resulting low and/or high boilers are separated off by distillation.

Purification of carboxylates containing aldehydes, acetals and/or

Ethanol is produced continuously via the carbonylation of methanol, by

Continuous production of ethanol and plural stage distillation of the

A process for purifying carboxylic acid esters which have been obtained by reacting olefinically unsaturated compounds with carbon monoxide and alkanols and which contain aldehydes or acetals, wherein the said esters are treated with a strongly acidic agent, with or without addition of water.

Purification of carboxylic acid esters containing aldehydes and/or

A process for the preparation of C.sub.1 -C.sub.4 -alkyl pent-3-enoates, wherein butadiene, or a hydrocarbon mixture containing butadiene, either of which contains not more than 0.1% by weight of butynes, is reacted with carbon monoxide and an alkanol of 1 to 4 carbon atoms in the presence of a cobalt carbonyl catalyst and a tertiary nitrogen base, having a pK.sub.A of 3-11, at from 100.degree. to 140.degree. C. under a pressure of from 300 to 1,000 bar.

Preparation of C.sub.1 -C.sub.4 -alkyl pent-3-enoates

A process for the preparation of butanedicarboxylic acid esters, wherein

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Eppelheim, Germany

Volker Taglieber