CONTINUOUS METHOD FOR HYDROGENATION OF NITRILES OR COMPOUNDS CONTAINING NITROGROUP

摘要

The invention relates to a method for the hydrogenation of compounds comprising cyano or nitro functions to give amino compounds aminonitriles or nitroamines. According to the invention, a method for continuous hydrogenation of compounds comprising cyano or nitro functions is carried out in the presence of a heterogeneous hydrogenation catalyst in a dispersed form and in the form of a basic compound. The reaction is carried out in a stirred reactor comprising an external circulation loop for the reaction medium which allows the separation of a proportion of the product without withdrawing catalyst by means of a tangential filtration. Said method is particularly applicable to the hydrogenation of adiponitrile to give a mixture of aminocapronitrile and hexamethylene diamine.