A novel surfactant 2-amino-6-decanamidohexanoic acid: Flotation performance and adsorption mechanism to diaspore

被引：46

作者：

Deng, Lanqing ^{[1
,2
]}

Wang, Shuai ^{[1
]}

Zhong, Hong ^{[1
]}

Liu, Guangyi ^{[1
]}

机构：

[1] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China

[2] Yueyang Vocat Tech Coll, Key Lab Yueyang Chinese Herbal Utilizat, Yueyang 414000, Peoples R China

来源：

MINERALS ENGINEERING | 2016年 / 93卷

基金：

中国国家自然科学基金;

关键词：

Flotation; Diaspore; Aluminosilicate mineral; Carboxyl group; Amide; CARBOXYL HYDROXAMIC ACIDS; COORDINATION PROPERTIES; REVERSE FLOTATION; FT-RAMAN; KAOLINITE; LYSINE; PYROPHYLLITE; SEPARATION; ILLITE; GEMINI;

D O I：

10.1016/j.mineng.2016.04.002

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this paper, a novel surfactant, 2-amino-6-decanamidohexanoic acid (AHA-10) was synthesized and used as a collector for flotation separation of diaspore and aluminosilicate minerals. The adsorption mechanism of AHA-10 onto diaspore was also evaluated by FTIR spectra, zeta potential, XPS and solution chemistry. The flotation results demonstrated that AHA-10 exhibited superior collecting power to diaspore and good selectivity against kaolinite and illite, and could effectively recover diaspore from bauxite ores contained aluminosilicate minerals at pH around 10. The analyses of FTIR spectra, zeta potential and solution chemistry inferred that at pH around 10, AHA-10 might chemisorb on diaspore surfaces by formation of Al-O and Al-N bonds. AHA-10's unique properties, such as characteristic bond model to Al atoms on diaspore surfaces, double hydrophobic groups and intermolecular hydrogen bonds between neighboring AHA-10 molecules coated on diaspore surfaces, rendering a weakening surface energy and enhancing hydrophobicity of diaspore particles. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：16 / 23

页数：8

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