Process for the preparation of triethylenediamine (TEDA) from ethylenediamine
AssigneeBASF SE
InventorsMatthias Frauenkron, Bernd Stein
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Abstract
A process for the preparation of triethylenediamine (TEDA) by reaction of ethylenediamine (EDA) in the presence of a zeolite catalyst, wherein the zeolite catalyst contains one or more metals M in oxidation states II, III or IV as oxides. The desired molar ratio of SiO2 to metal oxide of the zeolite catalyst depends on the oxidation state of the metal M as specified herein. The reaction temperature is from 250 to 500° C. TEDA is an important basic chemical and is used, among other things, in the preparation of pharmaceuticals and plastics, in particular as a catalyst in the preparation of polyurethanes.
Claims24
A process for the preparation of triethylenediamine (TEDA) characterized by reaction of ethylenediamine (EDA) in the presence of a zeolite catalyst, wherein the reaction is carried out in the presence of from 14 to 300% by weight of water, based on EDA employed, and wherein the zeolite catalyst comprises a metal M in oxidation state III, selected from the group consisting of B, Fe, Co, Ni, V, Mo, Mn, As, Sb, Bi, La, Ga, In, Y, Sc and Cr, and mixtures thereof, or oxidation state IV, selected from the group consisting of Ti, Zr, Ge, Hf and Sn, and mixtures thereof, as oxides, and
- for M=metal in oxidation state III, has an SiO2/M2O3 molar ratio of greater than 100:1 to 40,000:1, and
- for M=metal in oxidation state IV, has an SiO2/MO2 molar ratio of greater than 10:1 to 40,000:1, and
- the reaction temperature is from 250 to 500° C.
A process for the preparation of triethylenediamine (TEDA) by reaction of ethylenediamine (EDA) in the presence of a zeolite catalyst, wherein the reaction is carried out in the presence of from 14 to 300% by weight of water, based on EDA employed, and wherein the zeolite catalyst comprises a metal M in oxidation state III, selected from the group consisting of B, Fe, Co, Ni, V, Mo, Mn, As, Sb, Bi, La, Ga, In, Y, Sc and Cr, and mixtures thereof, or oxidation state IV, selected from the group consisting of Ti, Zr, Ge, Hf and Sn, and mixtures thereof, as oxides, and
- for M=metal in oxidation state III, has an SiO2/M2O3 molar ratio of greater than 100:1 to 40,000:1, and
- for M=metal in oxidation state IV, has an SiO2/MO2 molar ratio of greater than 10:1 to 40,000:1,
- the reaction temperature is from 250 to 500° C., and
- wherein the reaction is carried out in the presence of ammonia.
Dependencies are inferred from the claim text.