| 摘要 |
PURPOSE:To stably prepare objective cyclic amines at high yield over a long period of time with high selectively, by performing the gaseous intramolecular dehydration reaction of alkanolamines using a catalyst represented by a specific general formula. CONSTITUTION:A catalyst for the gaseous phase intramolecular dehydration reaction of alkanolamines represented by formula I (wherein X is an alkali metal or an alkaline earth metal, Y is B, Al, Si, S or the like and a, b, c and d are the atomic ratio of an element and, when a is 1, b is 0.01-3 and c is 0.005-100) is prepared. This catalyst is used to convert alkanol amines represented by formula II (wherein R and R' are H, a methyl group or an ethyl group and n is an integer of 2-5) to cyclic amines represented by formula III (wherein R, R' and n are same as the formula II). |
