Process for producing cyclic amines.

摘要

A catalyst for the vapor phase intramolecular dehydration reaction of an alkanolamine represented by the general formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="16" wi="53" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein each of R and R' is selected from hydrogen, a methyl group and an ethyl group, and n is an integer of 2 to 5, to convert it into a cyclic amine represented by the general formula
<Chemistry id="chema02" num="0002"><Image id="ia02" he="27" wi="60" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R, R' and n are as defined above. The catalyst is an oxide composition represented by the following formula
<Chemistry id="chema03" num="0003"><Image id="ia03" he="8" wi="26" file="IMGA0003.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein X is at least one element selected from alkali metals and alkaline earth metals, P is phosphorus, Y is at least one element selected from B, Al, Si, S, Sc, Ti, Cu, Y, Zr, Nb, Mo, Sn, Sb, La, Ce, Ta, W, Tl, Pb, Bi and Th, O is oxygen, the suffixes a, b, c and d represent the atomic ratios of the elements X, P, Y and 0, and when a=1, b=0.01 - 3 and c=0 - 100, and d is a value determined by a, b and c and the state of bonding of the constituent elements.