The flotation behavior and adsorption mechanisms of 2-((2-(decyloxy)ethyl)amino)lauric acid on quartz surface. (March 2018)

• Record Type: Journal Article
• Authors: Luo, Binbin; Zhu, Yimin; Sun, Chuanyao; Li, Yanjun; Han, Yuexin
• Is Part Of: Minerals engineering. Volume 117(2018)
• Page Start: 121
• Page End: 126
• Publication Date: 2018-03
• Subjects: Quartz -- Reverse flotation -- 2-((2-(decyloxy)ethyl)amino)lauric acid -- Low temperature -- Adsorption; Mines and mineral resources -- Periodicals; Ressources minérales -- Périodiques; Mines and mineral resources; Periodicals; Electronic journals; 622
• DOI: 10.1016/j.mineng.2017.12.016
• Languages: English
• ISSNs: 0892-6875

Abstract

Highlights: A novel surfactant 2-((2-(decyloxy)ethyl)amino)lauric acid was synthesized firstly. Ether atom, imino and carboxyl polar groups improved the activity and solubility. Collecting recovery of the new collector LDEA on quartz reached above 98.0% at 15 °C. Different adsorptions on the quartz was studied, especially the hydrogen adsorption. Abstract: A novel surfactant 2-((2-(decyloxy)ethyl)amino)lauric acid (LDEA) – substituting 3-(decyloxy)propan-1-amine (DPA) on the α-carbon position of lauric acid was firstly synthesized and utilized as a collector for the flotation of quartz mineral at a relatively low temperature. The flotation performances and adsorption mechanisms of LDEA collector on quartz mineral surface were investigated by zeta potential measurements, Fourier transform infrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS), in conjunction with the results of quartz micro-flotation tests. The flotation results showed that LDEA exhibited an excellent collecting performance on quartz mineral at a wide pulp pH range (about 6–11) with a low collector concentration 15.0 mg/L at a relatively low temperature 15 °C, where above 95.0% of the quartz mineral could be floated. Zeta potential measurements, FT-IR spectra, and XPS analyses reveal that the LDEA collector could be adsorbed on the surface of pure quartz in the forms of electrostatic and hydrogen bonding interactions at pulp pH 10.0.