甲胺在择形分子筛催化剂上的选择性合成

考察了同晶置换改性丝光沸石和金属表面活性改性ＨＺＳＭ－５对甲醇胺化反应的催化性能，发现两种改性方法都可以降低三甲胺（ＴＭＡ）选择性，提高一甲胺（ＭＭＡ）与二甲胺（ＤＭＡ）的选择性，两种方法都是通过分子筛外表面改性以实现择形性调变的，同晶置换改性可使丝光沸石的强酸性发生显著变化，而强Ｂ酸中心是丝光沸石催化胺化反应的活性中心。

SELECTIVE SYNTHESIS OF METHYLAMINE OVER SHAPE-SELECTIVE ZEOLITE CATALYSTS

ordenites and HZSM-5 are modified by isomorphous substitution and metal surfactant adsorption respectively. When the modified zeolites are used to catalyse methanol amination, the TMA selectivity decreases and the total selectivity for MMA and DMA increases. These two methods adjust the shape-selectivity by modifying the outside surface of zeolites. The isomorphous substitution modification changes the strong acid sites of mordenite remarkably. The strong Bronsted acid sites of mordenites are the active sites for catalytic amination.