摘要
用异丙醇铝水解法能调变ＮａＹ沸石的表面性质而在沸石表面“化学镀饰”上均匀的Ａｌ２Ｏ３层，所形成的新型复合多孔材料并不减小原有沸石的孔径，于８７３Ｋ焙烧后也未造成Ａｌ２Ｏ３的聚集和／或形成晶相．这种Ａｌ２Ｏ３－ＮａＹ复合多孔材料同时具有类似Ａｌ２Ｏ３的表面性质以及ＮａＹ沸石的特性（高比表面和择形性）。
A new porous material, with a layer of alumina coated on NaY zeolite and without any significant change in the pore si ze of zeolite, could be prepared by hydrolysis of aluminum isopropoxide. In the case of calcination at 773K, neither surface migration nor agglomeration of alum inum species was observed on the Al 2O 3 NaY samples, indicating the stabilit y of alumina layer coated on zeolites. Supported by KF or KNO 3, this new soli d base exhibited a higher basic streng th (H =17 18) than the parent zeolite (H =9 3). On the basis of experiments it was clear that hydrolysis of aluminum isopropoxide could be utilized to coat a stable layer of alumina on zeolites providing a novel way for preparation of a strong basic zeolite.
出处
《南京大学学报（自然科学版）》
CAS
CSCD
1998年第4期490-496,共7页
Journal of Nanjing University（Natural Science）
基金
八六三计划新材料领域
国家自然科学基金
北京石油化工科学研究院
南京大学分析中心测试基金
关键词
沸石修饰
异丙醇铝水解法
催化剂
氧化铝
Hydrolysis of aluminum isopropoxide , Modification of zeolites, Chemically coating a layer of oxide, Compound cat alytic materials based on molecular sieves
