由相似凝胶合成具有不同层间连接的两种钛硅酸盐。

Synthesis of two titanosilicates with distinct interlayer connections from similar gels.

作者信息

Ji Peng, Lu Kun, Lu Xinqing, Xu Hao, Wu Peng

机构信息

Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, North Zhongshan Rd. 3663, Shanghai 200062, PR China.

出版信息

Dalton Trans. 2017 May 9;46(18):5776-5780. doi: 10.1039/c7dt00640c.

DOI:10.1039/c7dt00640c

PMID:28401221

Abstract

Ti-SSZ-70 and Ti-ECNU-6, with identical intralayer structures but distinct interlayer connections, were prepared from similar synthetic gels free of alkali metal ions and boric acid. Ti-SSZ-70, composed of vertically misaligned MWW layers, was transferred to Ti-ECNU-6, structurally analogous to the Ti-MWW zeolite with a well-aligned layer stacking, upon the addition of an appropriate amount of hexamethyleneimine to the gel. These two titanosilicate catalysts exhibited outstanding catalytic activities in the liquid-phase alkene epoxidation.

摘要

Ti-SSZ-70和Ti-ECNU-6由不含碱金属离子和硼酸的类似合成凝胶制备而成，具有相同的层内结构但层间连接不同。由垂直错位的MWW层组成的Ti-SSZ-70，在凝胶中加入适量的六亚甲基亚胺后，转变为结构类似于具有排列良好的层堆积的Ti-MWW沸石的Ti-ECNU-6。这两种钛硅催化剂在液相烯烃环氧化反应中表现出出色的催化活性。