Secondary amines of the formula (II)
(X--CH.sub.2 --).sub.2 NH (II)
where
X is a C.sub.1-20 -alkyl, C.sub.2-20 -alkenyl or C.sub.3-8 -cycloalkyl
group which may be unsubstituted or substituted by C.sub.1-20 -alkyl,
C.sub.3-8 -cycloalkyl, C.sub.4-20 -alkylcycloalkyl, C.sub.4-20
-cycoalkylalkyl, C.sub.2-20 -alkoxyalkyl, C.sub.6-14 -aryl, C.sub.7-20
-alkylaryl, C.sub.7-20 -aralkyl, C.sub.1-20 -alkoxy, hydroxy, C.sub.1-20
-hydroxyalkyl, amino, C.sub.1-20 -alkylamino, C.sub.2-20 -dialkylamino,
C.sub.2-12 -alkenylamino, C.sub.3-8 -cycloalkylamino, arylamino,
diarylamino, aryl-C.sub.1-8 -alkylamino, halogen, mercapto, C.sub.2-20
-alkenyloxy, C.sub.3-8 -cycloalkoxy, aryloxy and/or C.sub.2-8
-alkoxycarbonyl,
are prepared by reacting nitriles of the formula (III)
X--CN (III)
with hydrogen at from 20 to 250.degree. C. and pressures of from 60 to 350
bar in the presence of an Rh-containing catalyst comprising from 0.1 to 5%
by weight, based on the total weight of the catalyst, of Rh on a support
to give mixtures of primary amines of the formula (I)
X--CH.sub.2 --NH.sub.2 (I)
and secondary amines of the formula (II)
(X--CH.sub.2 --).sub.2 NH (II)
and returning at least part of the primary amines separated from the
mixtures obtained to the reaction.
Вторичные амины формулы (ii) (х -- CH.sub.2 -- ).sub.2 nh (ii) где х будет C.sub.1-20 - алкил, C.sub.2-20 - алкенил или C.sub.3-8 - группа cycloalkyl который могут быть unsubstituted или заменен Ч.суб.й-20 - алкил, C.sub.3-8 - cycloalkyl, C.sub.4-20 - alkylcycloalkyl, C.sub.4-20 - cycoalkylalkyl, C.sub.2-20 - alkoxyalkyl, C.sub.6-14 - арил, C.sub.7-20 - alkylaryl, C.sub.7-20 - aralkyl, C.sub.1-20 - алкоксидное, окси, C.sub.1-20 - hydroxyalkyl, амино, C.sub.1-20 - alkylamino, C.sub.2-20 - dialkylamino, C.sub.2-12 - alkenylamino, C.sub.3-8 - cycloalkylamino, arylamino, diarylamino, aryl-C.sub.1-8 - alkylamino, галоид, mercapto, C.sub.2-20 - alkenyloxy, C.sub.3-8 - cycloalkoxy, aryloxy and/or C.sub.2-8 - alkoxycarbonyl, подготовьте путем реагировать нитрилы формулы (iii) x -- cn (iii) с водоподом на от 20 к 250.degree. C и давления от штанга 60 до 350 in the presence of Рю-soderja катализатор состоя из от 0.1 к 5% весом, основанные на полном весе катализатора, rh на поддержке для того чтобы дать смеси первичных аминов формулы (I) x -- CH.sub.2 -- NH.sub.2 (I) и вторичных аминов формулы (ii) (х -- CH.sub.2 -- ).sub.2 nh (ii) и возвращающ по крайней мере часть главным образом аминов отделенных от полученных смесей к реакции.
