Patent ID: 6562971
Filing Date: 2003-05-13
Classification: C07D,Y02P

Abstract:
A process for the preparation of triethylenediamine (TEDA), which comprises reacting ethylenediamine (EDA) and one or more amine compounds selected from the group consisting of monoethanolamine, diethanolamine, triethanolamine, piperazine (PIP), diethylenetriamine, triethylenetetramine, tri(2-aminoethyl)amine, N-(2-aminoethyl)ethanolamine, N-(2-hydroxyethyl)piperazine and N-(2-aminoethyl)piperazine, in the presence of a zeoline catalyst, wherein the zeolite catalyst comprises one or more metals M in oxidation state III or IV as oxides, andfor M=Al, has an SiO2/M2O3 molar ratio of greater than 1400:1 to 40,000:1, for M=metal in oxidation state III or M=two or more metals in oxidation state III, has an SiO2/M2O3 molar ratio of from greater than 100:1 to 40,000:1, and for M=metal in oxidation state IV or M=two or more metals in oxidation state IV, has an SiO2 /M2 molar ratio of from greater than 100:1 to 40,000:1, and the reaction temperature is from 250 to 500Â° C.