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杂多酸在膨润土上的固载化:Ⅰ.表面酸性和吸附机理的研究
引用本文:胡玉才,叶兴凯.杂多酸在膨润土上的固载化:Ⅰ.表面酸性和吸附机理的研究[J].离子交换与吸附,1995,11(1):58-67.
作者姓名:胡玉才  叶兴凯
作者单位:中国科学院长春应用化学研究所
摘    要:本文研究了四种具有Keggin结构的杂多酸在膨润土及其酸处理样品上的吸附,利用Hammett指示剂法和丁胺滴定法测定了膨润土吸附PW12和SiW12前后表面酸强度和酸度的变化。实验表明:四种杂多酸在不同载体上的吸附,对溶剂是有选择性,在一些有机溶剂中,PW12和SiW12的吸附等温线都呈Langmuir型,而PMo12和SiMo12的吸附等温线随溶剂的不同呈现不同的形式。膨润土吸附杂多酸后酸强度不

关 键 词:杂多酸  膨润土  固载化  吸附  表面酸性

HETEROGENIGATION OF HETEROPLOY ACIDS ON BENTONITES I. STUDY OF SURFACE ACIDIC PROPERTIES AND ADSORPTION MECHANISM
Hu Yucai, Ye Xingkai, Wu Yue.HETEROGENIGATION OF HETEROPLOY ACIDS ON BENTONITES I. STUDY OF SURFACE ACIDIC PROPERTIES AND ADSORPTION MECHANISM[J].Ion Exchange and Adsorption,1995,11(1):58-67.
Authors:Hu Yucai  Ye Xingkai  Wu Yue
Abstract:Adsorption of 12-phosphotungstic(PW12), 12-silicotungstic(SiW12), 12-phosphomoly bdic(PMo12) and 12-silicomolybdic(SiMo12) acids with Keggin structure on bentonite and its acid-treated samples were studied in this paper. Surface acid a Amount and acid Strength were also measured by Hammett indicator and n-butylamine titration methods before and after supports adsorbed PW12and SiW12. The experimental results were showed that adsorption isotherms of PW12 and SiW12 presented Langmuir type while those of PMo12 and SiMo12 had different types in different solvants. After supports adsorbed PW12 and SiW12, their acid strength kept unchanging but acid amount increased. In addition, adsorption mechanism was given.
Keywords:Heteropoly acids  Bentonite  Adsorption  Surface acidic properties  Heterogenization
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