THERMAL INVESTIGATION OF ACID-ACTIVATED ATTAPULGITES - INFLUENCE OF ISOMORPHIC SUBSTITUTION IN THE OCTAHEDRAL SHEET

被引：7
作者：
GONZALEZ, F
PESQUERA, C
BENITO, I
机构：
来源：
THERMOCHIMICA ACTA | 1992年 / 194卷
关键词：
D O I：
10.1016/0040-6031(92)80022-O
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Two samples of Spanish attapulgite with different degrees of isomorphic substitution in the octahedral sheet were studied. Both the aluminium-rich and magnesium-rich samples were activated with hydrochloric acid of various concentrations. TG and DSC curves of activated as well as natural attapulgite were obtained. From the analysis of these curves, the influence of the degree of isomorphic replacement of Mg2+ by Al3+ on the results of the acid activation was deduced.
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页码：239 / 246
页数：8
相关论文
共 12 条
[1]  
Bradley WF, 1940, AM MINERAL, V25, P405
[2]   INFLUENCE OF THE CHEMICAL-COMPOSITION AND TEXTURAL CHARACTERISTICS OF PALYGORSKITE ON THE ACID LEACHING OF OCTAHEDRAL CATIONS [J].
CORMA, A ;
MIFSUD, A ;
SANZ, E .
CLAY MINERALS, 1987, 22 (02) :225-232
[3]   STABILITY OF PARATHION ON ATTAPULGITE AS AFFECTED BY STRUCTURAL AND HYDRATION CHANGES [J].
GERSTL, Z ;
YARON, B .
CLAYS AND CLAY MINERALS, 1981, 29 (01) :53-59
[4]   MECHANISM OF ACID ACTIVATION OF MAGNESIC PALYGORSKITE [J].
GONZALEZ, F ;
PESQUERA, C ;
BENITO, I ;
MENDIOROZ, S ;
PAJARES, JA .
CLAYS AND CLAY MINERALS, 1989, 37 (03) :258-262
[5]   ISOMORPHIC SUBSTITUTION IN ATTAPULGITE AND ITS INFLUENCE ON THE DEHYDRATION PROCESS [J].
GONZALEZ, F ;
PESQUERA, C ;
BENITO, I ;
MENDIOROZ, S ;
PAJARES, JA .
THERMOCHIMICA ACTA, 1990, 167 (01) :139-143
[6]  
GONZALEZ F, 1988, THESIS U OVIEDO SPAI
[7]  
GONZALEZ F, 1990, APPL CLAY SCI, V4, P373
[8]  
MAKKI M, 1976, B SOC CHIM FR, V1, P15
[9]   INFRARED STUDY OF ATTAPULGITE AND HCL TREATED ATTAPULGITE [J].
MENDELOV.E .
CLAYS AND CLAY MINERALS, 1973, 21 (02) :115-119
[10]  
NATHAN Y, 1968, ISRAEL J CHEM, V6, P275
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