Process for the preparation of aminonitrile and diamine, and corresponding devices

摘要

The present invention relates to a continuous process for the preparation of an aminonitrile comprising the stages of:
a) formation of the 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 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 stage c) to the reaction of stage a), ande) 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 stage d).

主权项

1. 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).