Validity of critical coalescence concentration in dynamic conditions

Amphiphilic cellulose and surfactant mixtures as green frothers in mineral flotation. 2. Flotation of chalcopyrite and Cu-containing tailings

“…Bubble-breakup induced bubble size reduction (Chu et al, 2017) 3. Affecting bubble size already during the initial formation of the bubble (Jávor et al, 2014).…”

“…Perhaps the most interesting property of cellulose derivatives from the flotation point of view is the reported capability of forming a protective layer against coalescence and mechanical stress (Wege et al, 2008;Xhanari et al, 2011). This could assist in maintaining small bubbles even in turbulent conditions, something which current frothers cannot accomplish (Jávor et al, 2014). Furthermore, the active groups along the cellulose backbone reportedly provide potential adsorption sites for surfactant adsorption and consequent polymer-surfactant (PS) complexation (Katona et al 2008).…”

Interfacial Tension Sensor for Low Dosage Surfactant Detection

“…A number of approaches to the study of the kinetics of frother adsorption at the air-liquid interface as well as the equilibrium interfacial tension for different frothers have been reported [18][19][20][21][22][23]. Studies involve the application of various measurement techniques such as Wilhelmy plate [22], Du Noüy ring [23], or profile analysis tensiometry (with both a pendant drop and emerging bubble geometries used) [18,19,21,24]. However, all of these techniques rely on static conditions, in which the adsorption of frother molecules at the interfacial surface happens in the absence of flow, and may not reflect adsorption under dynamic conditions, i.e., such as in the flotation tank [24].…”

Correlations for Easy Calculation of the Critical Coalescence Concentration (CCC) of Simple Frothers

“…The values of CCC are important for the proper choice of flotation frothers. Therefore, the CCC values of many frothers were measured [18,[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. Meanwhile, currently, new formulations of frothers and collectors often emerge according to the specific needs of the mining industry.…”

“…The molecular descriptor, which we use in the present study, is the HLB values defined by Davies [46]. To study more a detailed relation between the molecular structure of the frothers and their CCC values, we collected literature on experimentally determined CCC values [18,[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43] of a series of frothers with subsequent change in their molecular structure. There was a subsequent increase in the number of methylene groups in the main chain of primary alcohols, secondary alcohols, tertiary alcohols, and a branched alcohol, and propoxy and ethoxy frothers.…”