| 摘要 |
PURPOSE:To stably convert alkanolamines to cyclic amines represented by a general formula over a long period of time at a high conversion rate with high selectively by using alkanolamines represented by a general formula. CONSTITUTION:Alkanolamines represented by general formula I (wherein R and R' are selected from hydrogen, a methyl group and an ethyl group and n is an integer of 2-5) is converted to cyclic amines represented by general formula II (wherein R, R' and n are the same ones as the aforementioned formula I) using a catalyst characterized by that it is composed of sulfate of a transition metal belonged to the Fourth Cycle of the Group VIII of the Periodic Table. As alkanol amines, monoethanolamine, isopropanolamine or the like are designated and, as the catalyst composed of sulfate of a transition metal belonged to the Fourth Cycle of the Group VIII of the Periodic Table, sulfate of nickel, cobalt or iron is used. |
