Effect of Hydroxyethyl on Cationic Collector of Quaternary Ammonium Salts

doi:10.12068/j.issn.1005-3026.2023.07.014

Abstract

Abstract: In order to systematically study the influence of the introduction of hydroxyethyl on the performance of quaternary ammonium salt collectors， flotation test， contact angle test， toxicity test， degradation test， surface tension test， Zeta potential test， molecular dynamics analysis and other methods were adopted in this paper. The performance differences of dodecyl dihydroxyethyl methyl ammonium bromide (BHMDB) and dodecyl trimethyl ammonium bromide (DTAB) were studied， and the influence mechanism of hydroxyethyl on the performance of collector quaternary ammonium salts was analyzed. Compared with DTAB， BHMDB has better collection capacity， flotation selectivity， pH adaptability and hydrophobicity. The introduction of hydroxyethyl reduces the toxicity and critical micelle concentration of the solution， but makes the degradation worse. Through the analysis of the mechanism of the collector， it can be seen that the introduction of hydroxyethyl group strengthens the hydrogen bond between the agent and the mineral surface， increases the cross-sectional area of the polar group of the agent， and makes it more selective.

Key words: quaternary ammonium salt collector; hydroxyethyl; hematite reverse flotation; toxicity; degradability

CLC Number:

TD923.14

LIU Wen-bao， TONG Ke-lin， LIU Wen-gang， ZHAO Pan-xing. Effect of Hydroxyethyl on Cationic Collector of Quaternary Ammonium Salts[J]. Journal of Northeastern University(Natural Science), 2023, 44(7): 1019-1025.

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