US 4,743,702 AGranted

Preparation of aliphatic dinitriles

AssigneeBASF SE

InventorsWolfgang Hoelderich, Hubert Lendle, Peter Magnussen, Hans Leitner, Jost H. Manegold, Wolfgang Leitenberger

Life of this patent

Estimating the term…

Abstract

Aliphatic dinitriles are prepared by reacting aliphatic dicarboxylic acids with ammonia in excess at from 200.degree. to 500.degree. C. in the presence of zeolites as catalysts.

Claims9

Dependent claims

A process for preparing a C.sub.2 -C.sub.12 alkylenedinitrile which comprises:

reacting a C.sub.2 -C.sub.12 alkylenedicarboxylic acid with excess ammonia at from 200.degree. to 500.degree. C. in the presence of a zeolite having a pentasil structure selected from the group consisting of borosilicate and iron silicate.

Dependencies are inferred from the claim text.

patentgrep

Loading patent…

Abstract

Aliphatic dinitriles are prepared by reacting aliphatic dicarboxylic acids with ammonia in excess at from 200.degree. to 500.degree. C. in the presence of zeolites as catalysts.