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US 4,904,812 AGranted
Preparation of unsaturated nitriles
AssigneeBASF SE
InventorsWolfgang Hoelderich, Matthias Schwarzmann
Life of this patent
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Abstract
Unsaturated nitriles are prepared from lactones and NH.sub.3 by a process in which the reaction of the lactone with NH.sub.3 is carried out in the presence of a zeolite as a catalyst. A particularly suitable starting material is caprolactone and particularly suitable catalysts are zeolites of the pentasil type, for example aluminosilicate zeolites.
Claims11
A process for preparing olefinically unsaturated nitriles which comprises:
- in one process step, cleaving lactones, containing 5 to 7 ring members and being unsubstituted or alkyl-, aryl- or aralkyl substituted by reacting the lactone with ammonia at a temperature of 150.degree.-500.degree. C. and in a molar ratio of lactone to ammonia of from 1:1 to 1:30 in the presence of a zeolite catalyst.
A process for preparing olefinically unsaturated nitriles which comprises:
- in one process step, cleaving lactones, containing 5 to 7 ring members and being unsubstituted or alkyl-, aryl- or aralkyl- substituted by reacting the lactone with ammonia at a temperature of 150.degree.-500.degree. C. and in a molar ratio of lactone to ammonia of from 1:1 to 1:30 in the presence of a borosilicate, iron silicate, beryllium silicate, gallium silicate, chromium silicate, arsenic silicate, antimony silicate, bismuth silicate, aluminogermanate, borogermanate, gallium germanate or iron germanate zeolite catalyst or mixtures thereof.
Dependencies are inferred from the claim text.