沸石在畜牧和水产业中的应用

一、沸石在畜牧业中的应用自从1965年日本首次利用天然沸石作为家禽、猪和牛的日粮添加剂应用以来,世界各国对沸石的研究利用日益高涨,据报道,到1976年为止,全世界约有一万多篇有关沸石的论文,并拥有三种多种专利。目前,美、

Coordinatively unsaturated sites in zeolite matrix: Construction and catalysis

Zeolites with ordered porous structure of molecular size are widely employed as commercial adsorbents and catalysts.On the other hand,the zeolite matrix is regarded as an ideal scaffold for hosting coordinatively unsaturated sites.Remarkable achievements have been made dealing with the construction,characterization and catalytic applications of coordinatively unsaturated sites in zeolite matrix.Herein,a literature overview of recent progresses on this important topic is presented from the specific view of coordination chemistry.Different strategies to construction coordinatively unsaturated sites in zeolite matrix,in zeolite framework or extraframework positions,are first introduced and their characteristics are compared.Then,spectroscopic techniques to determine the existing states of cation sites and their transformations in zeolite matrix are discussed.In the last section,the catalytic applications of coordinatively unsaturated sites in zeolite matrix for various important chemical transformations are summarized.

我国沸石资源及其开发利用

沸石在建材，化工，轻工，农牧业等许多领域有着广泛的用途。经过近２０多年来的地质勘查，了９．７亿ｔ沸石储量，成为世界上和美国，俄罗斯，日本并列的沸石资源大国。本文总结了我国沸石矿的地质特征，成因类型及成矿规律，并对沸石矿的生产，开发利用现状和形势作了全面介绍，指出沸石是具有重要应用前景的非金属矿产。