PREPARATION AND THERMAL-ANALYSIS OF SYNTHETIC MALACHITE CUCO3.CU(OH)2

被引：29

作者：

TANAKA, H

YAMANE, M

机构：

[1] Chemistry Laboratory, Faculty of School Education, Hiroshima University, Hiroshima, 734, Shinonome, Minamiku

来源：

JOURNAL OF THERMAL ANALYSIS | 1992年 / 38卷 / 04期

关键词：

KINETICS OF THERMAL DECOMPOSITION; SYNTHETIC MALACHITE;

D O I：

10.1007/BF01979390

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The synthesis of malachite CUCO3.CU(OH)2 Or CU2CO3(OH)2 was studied through titrations of copper(II) salt solutions with a solution of sodium carbonate at different temperatures. The precipitates were characterized by TG, IR and chemical analysis. The composition varies depending on the pH of the solution and the temperature. Purer malachite was synthesized by simple mixing of a solution of copper(II) nitrate or sulfate with a solution of sodium carbonate at 50-degrees-C. The kinetics of the thermal decomposition of synthetic malachite was described by either R3 or A(m)(m=1.2-1.4) law. according to TG analysis, both isothermal and nonisothermal. The Arrhenius parameters determined using three different integral methods showed the kinetic compensation effect, which is correlated to the working temperature interval analyzed.

引用

页码：627 / 634

页数：8

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