CATALYST AND PROCESS FOR THE MANUFACTURE OF AMINES FROM ALCOHOLS

摘要

1. Amination catalyst for the production of ethylene diamine and of piperazine from ethanolamine, the active metal of which is from the family of transition metals, the proportion of which represents 30 % to 70 % by weight of the catalyst, the association of transition metal and microporous support into a structural body being obtained by co-precipitation of all the ingredients of the catalyst by means of soluble salts or by impregnation of a soluble salt of the active elements into the previously combined refractory oxides followed by a thermal treatment and reduction, characterized in that the active metal in nickel solely or in association with other transition metals such as copper or cobalt ; the nickel representing at least 50 % of the active material, uniformly combined into a porous refractory structure with a specific surface between 10 and 300 m**2/g and with a pore diameter smaller than 5 000 8A, selected from the group consisting of alumina, silica, thoria and cerium oxide, and that the association of transition metal and micro porous support is subjected to a thermal treatment with air at a temperature between 350 and 500 degrees C, for several hours, with a progressive increase in temperature of 50 degrees C per hour from the ambiant, then to a said direct reduction under a flow of reducing gas between 400 and 550 degrees C for several hours, with an increase in temperature of 50 degrees C per hour from the ambiant to the temperature of reduction.