Process for the Preparation of Aminonitrile and Diamine, and Corresponding Devices

A continuous process for the preparation of an aminonitrile comprising the stages of:

• a) formation of an aminonitrile by reaction between an alkenyl nitrile, mixed with aminonitrile, and a monoamine introduced in molar excess with respect to the alkenyl nitrile;
• b) separation of the unreacted monoamine and the aminonitrile;
• c) reaction between the monoamine separated during said stage b) and all or part of the alkenyl nitrile in order to form a mixture of aminonitrile and of unreacted alkenyl nitrile, with the alkenyl nitrile being introduced in molar excess with respect to the said monoamine;
• d) transfer of the mixture of aminonitrile and alkenyl nitrile resulting from said stage c) to the reaction of stage a), and e) in the case where only a portion of the alkenyl nitrile is introduced during stage c), introduction of the remaining molar amount of alkenyl nitrile into the mixture of said stage d);
• the total molar amount of the alkenyl nitrile introduced during said stages c) and e) being equal to the molar amount of monoamine introduced during said stage a).