ADSORPTION OF HYDROXAMATE COLLECTORS ON SEMISOLUBLE MINERALS .3. EFFECT OF TEMPERATURE ON ADSORPTION

被引：0
|
作者：
PRADIP
FUERSTENAU, DW
机构：
[1] Univ of California, Berkeley, Dep of, Materials Science & Mineral, Engineering, Berkeley, CA, USA, Univ of California, Berkeley, Dep of Materials Science & Mineral Engineering, Berkeley, CA, USA
来源：
COLLOIDS AND SURFACES | 1985年 / 15卷 / 1-2期
基金：
美国国家科学基金会;
关键词：
ADSORPTION - Thermal Effects - BARITE - CALCITE - ORE TREATMENT - Flotation;
D O I：
10.1016/0166-6622(85)80061-5
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of temperature on the adsorption of potassium octyl hydroxamate on barite, calcite, and bastnaesite has been investigated. The results of this adsorption study at elevated temperatures exhibit increased uptake of potassium octyl hydroxamate with temperature on barite, calcite, and bastnaesite minerals, suggesting endothermic chemisorption mechanism with large entropic effects. The large entropies can be attributed to the relative loosening of ordered water structures at the mineral surface and in the bulk during the adsorption process and are also due to hydrophobic chain association effects. The effect of temperature on adsorption is relatively more pronounced in the case of bastnaesite than in the case of the two other minerals, namely barite and calcite. This work is of interest in ore flotation.
引用
收藏
页码：137 / 146
页数：10
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