| 摘要 |
PURPOSE:To stably prepare objective cyclic amines at good yield over a long period of time with high selectivity, by performing the gaseous phase intramolecular dehydration reaction of alkanolamines using a catalyst composition represented by a specific general formula. CONSTITUTION:A catalyst for the gaseous phase intramolecular dehydration reaction represented by formula I (wherein X is an alkali metal or an alkaline earth metal, Y is Sc, Ti, Cu, Y Zr, Nb or the like and a, b, c and d is the atomic ratio of an element and, when a is 1, b is 0.01-3 and c is 0.005-10 and d is a value determined on the basis of a bonding state) is prepared. This catalyst is used to convert alkanolamines represented by formula (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 III). |
