Surface tension and gas dispersion properties of fatty acid solutions

Atrafi, Avishan; Pawlik, Marek

doi:10.1016/j.mineng.2015.11.006

Cited by 15 publications

(4 citation statements)

References 15 publications

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“…where q is the contact angle, L the lateral length, and L c the critical lateral extension (L c ¼ 4s/P 0 z 2.84 mm), 14 where s is the surface tension and P 0 the ambient pressure). Although reagents such as fatty acids have been shown to effect surface tension in macroscopic bubbles, 25,26 the contact angle and therefore surface tension of nanobubbles does not necessarily appear to be effected by reagents. 27,28 In Fig.…”

Section: Resultsmentioning

confidence: 99%

Surface nanobubbles on the carbonate mineral dolomite

et al. 2018

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Section: Resultsmentioning

confidence: 99%

Surface nanobubbles on the carbonate mineral dolomite

et al. 2018

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“…This result suggests that both carboxylic and carboxylate types of linear‐dendritic compounds can adsorb at the air/water interface. However, C 18 ‐G 1 ‐(COONa) 2 and C 18 ‐G 2 ‐(COONa) 4 generally have lower surface tension values than those of C 18 ‐G 1 ‐(COOH) 2 and C 18 ‐G 2 ‐(COOH) 4 , which indicates higher surface activity of two linear‐dendritic carboxylate surfactants (Atrafi and Pawlik, 2016). It is noted that C 18 ‐G 1 ‐(COONa) 2 and C 18 ‐G 2 ‐(COONa) 4 give nonlinear changes in the whole surfactant concentration range below the break point in the curves of γ ‐log C , which is generally observed for the surfactant systems and can be fitted by Szyszkowski equation (Daniel and Berg, 2002).…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Micellization, and Surface Activity of Novel Linear‐Dendritic Carboxylate Surfactants

Lou

Dong

Wang

et al. 2020

J Surfact & Detergents

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Two generations of novel linear-dendritic carboxylate surfactants C 18-G 1-(COONa) 2 and C 18-G 2-(COONa) 4 have been synthesized by the divergent method and their structures are characterized by 1 H Nuclear Magnetic Resonance and Infrared analysis. The electrical conductivity measurement is used to measure the Krafft temperatures of C 18-G 1-(COONa) 2 and C 18-G 2-(COONa) 4 , which are much smaller than those of the corresponding conventional surfactant sodium stearate. The markedly enhanced solubility of two linear-dendritic surfactants is ascribed to the high hydrophilicity of surfactant headgroups induced by the carboxylate and ester groups. The critical micelle concentration (CMC) values obtained from both the electrical conductivity and surface tension measurements indicate that the micellizations of linear-dendritic surfactants become favorable with the increase in the number of the surfactant headgroup. However, the surface activity parameters including the surface tension at the CMC, maximum surface excess, and minimum surface area reveal that C 18-G 1-(COONa) 2 exhibits greater efficiency in absorbing at the air/water interface compared to C 18-G 2-(COONa) 4 , owing to their different steric repulsions of the surfactant headgroups. In addition, C 18-G 1-(COONa) 2 and C 18-G 2-(COONa) 4 have higher emulsifying ability than the conventional surfactants sodium stearate and sodium octadecyl sulfate.

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“…Modification, emulsification and synergistic dosing are the conventional methods [108,109] to improve the dispersibility and collection performance of fatty acids under low temperature conditions. Therefore, improving the dispersity and selectivity of the collector at low temperatures by optimizing the flotation reagent scheme is the key to improving the flotation index.…”

Section: Industrial Practice Cases Of Flotation Separation Of Fluorit...mentioning

confidence: 99%

Difficulties and Recent Achievements in Flotation Separation of Fluorite from Calcite—An Overview

Huang

Zhang

Li³

et al. 2022

Minerals

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As an important strategic non-metallic mineral resource, fluorite has been widely used in various industrial fields, such as metallurgy, optics and semiconductor manufacturing, as well as fluorine-related chemical engineering. Since the major gangue minerals of fluorite ore are silicate and carbonate ones, flotation is the main beneficiation method for the concentration. Compared with the relatively easy operation for silicate-type fluorite ore, fluorite concentration from calcite has always been the most difficult challenge in the field of mineral processing. In this review, analyses of the fundamental reasons for the difficulties of flotation separation of fluorite from calcite are performed, from the similar surface properties of both calcium minerals to the deterioration by the interference of dissolved ions in the pulp during grinding and flotation. Recent achievements in the flotation separation of fluorite from calcite as the main contents are comprehensively summarized, covering all aspects of flotation reagents of collectors, depressants and modifiers. Finally, successful examples of industrial practices forfluorite and calcite flotation separation are introduced. This overview provides a detailed and comprehensive reference source for the current research status of fluorite and calcite flotation separation, and some suggestions for future research are provided.

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Surface tension and gas dispersion properties of fatty acid solutions

Cited by 15 publications

References 15 publications

Surface nanobubbles on the carbonate mineral dolomite

Surface nanobubbles on the carbonate mineral dolomite

Synthesis, Micellization, and Surface Activity of Novel Linear‐Dendritic Carboxylate Surfactants

Difficulties and Recent Achievements in Flotation Separation of Fluorite from Calcite—An Overview

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