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Minerals 2018, 8(4), 168;

Effect of Chain Length Compatibility of Alcohols on Muscovite Flotation by Dodecyl Amine

School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China
BGRIMM Machinery and Automation Technology Co., Ltd., Beijing 100160, China
Authors to whom correspondence should be addressed.
Received: 15 March 2018 / Revised: 11 April 2018 / Accepted: 15 April 2018 / Published: 19 April 2018
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A portion of dodecyl amine (DDA) in a muscovite flotation system was replaced with alcohols with different carbon-chain lengths. These alcohols included octanol (OCT); decanol (DEC); dodecanol (DOD); and tetradecanol (TER). The muscovite adsorption behavior of the mixed DDA and alcohol systems were investigated through zeta potential; contact angle; and adsorption quantity tests. Single-mineral flotation tests showed that the muscovite-collecting power of the mixed DDA/alcohol (OCT, DEC, or DOD) system was stronger than that of the pure DDA system. The muscovite-collecting power of the collector systems decreased in the following order: DDA/DEC > DDA/OCT > DDA/DEC > DDA > DDA/TER. Zeta potential and contact angle analysis indicated that when combined with DDA; alcohols physically adsorbed on the surfaces of muscovite. This behavior improved the hydrophobicity of muscovite. Furthermore, adsorption analysis revealed that synergy between DDA and alcohol enhanced the adsorption of alcohol on muscovite. DDA has a dominant role in synergistic adsorption; whereas alcohol has a supporting role. Among all tested alcohols; DDA and DOD exhibit the highest synergetic adsorption effect because of their similar carbon-chain lengths. This similarity promotes the formation of a compact adsorption layer on the muscovite surface. View Full-Text
Keywords: muscovite; dodecyl amine; alcohol; flotation; mixed collector; synergistic effect muscovite; dodecyl amine; alcohol; flotation; mixed collector; synergistic effect

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Wang, L.; Sun, N.; Liu, J.; Tang, H.; Liu, R.; Han, H.; Sun, W.; Hu, Y. Effect of Chain Length Compatibility of Alcohols on Muscovite Flotation by Dodecyl Amine. Minerals 2018, 8, 168.

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