Synergetic effect of cottonseed fatty acid salt and nonionic surfactant NP-4 in the froth flotation of siliceous-calcareous phosphate rock

Ruan, Yaoyang; Deng, Bona; He, Dongsheng; Chi, Ruan

doi:10.1016/j.colsurfa.2021.126650

Cited by 12 publications

(2 citation statements)

References 29 publications

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“…Cottonseed fatty acid salts (CSFA) and the nonionic surfactant NP-4 (nonylphenol polyoxyethylene ether) were coadsorbed on the surfaces of apatite and calcite but competed for adsorption on the quartz surface, thus increasing the selectivity. At the same time, they found that the nonpolar surfactants acted as emulsifiers and reduced the number of collectors needed [95]. Filippov and Filippova reported the effects of nonionic agent concentrations (exol) on the adsorption of sodium oleate on the scheelite and calcite surfaces.…”

Section: Nonpolar Collectorsmentioning

confidence: 97%

Research Progress with Scheelite Flotation Reagents: A Review

Lu,

Ding,

et al. 2023

Minerals

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With the depletion of easily mined and separated wolframite, scheelite has become the primary source of tungsten. Flotation is the primary technique used to enrich scheelite. However, flotation separation of scheelite from calcium-bearing gangue minerals, such as calcite and fluorite, has always been challenging due to their similar surface properties. To date, various flotation reagents and related mechanisms have been proposed for scheelite, which have attracted considerable attention. This paper reviews the scheelite flotation reagents, including collectors and regulators, and introduces recent research progress on the mechanisms for the interactions between the flotation reagents and mineral surfaces. The advantages and limitations of different flotation reagents are discussed. Inorganic or organic inhibitors in combination with fatty acids, chelate collectors, and cationic collectors are commonly used to separate scheelite from calcium-bearing gangue. Flotation differences between the scheelite and calcium-bearing minerals can be explained by variations in the electrical charges and steric hindrance at the mineral surfaces. In the future, fatty acid collectors will be still the main collectors used in scheelite flotation due to their low cost and strong collecting ability, and new collectors with high selectivity (such as metal complex collectors, new chelate collectors, new environmental collectors) will become a new research hotspot in the future due to their good selectivity.

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Section: Nonpolar Collectorsmentioning

confidence: 97%

Research Progress with Scheelite Flotation Reagents: A Review

Lu,

Ding,

et al. 2023

Minerals

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“…The results showed that the ionic liquids surfactants adsorption quantity was low, and the surfactants aggregation would increase the surfactants adsorption quantity. The surfactants adsorption onto rock surface could be controlled by the surface charge of rocks and surfactants ( Liu et al, 2021 ; Ruan et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Study of the Adsorption Behavior of Surfactants on Carbonate Surface by Experiment and Molecular Dynamics Simulation

Hou

Lin

2022

Front. Chem.

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Surfactants adsorption onto carbonate reservoirs would cause surfactants concentrations decrease in surfactant flooding, which would decrease surfactant efficiency in practical applications of enhanced oil recovery (EOR) processes. Different surfactants could be classified as cationic surfactants, anionic surfactants, non-ionic surfactants according to the main charge, or be classified as chemical surfactant and bio-surfactant according to the surfactant origin. However, the research on different type surfactants adsorption on carbonate reservoirs surface differences was few. Therefore, five representative surfactants (CTAB, SDS, TX-100, sophorolipid, rhamonilipid) adsorption effect onto carbonate reservoirs surface was studied. Owing to the fact that the salinity and temperature in underground carbonate reservoirs were high during the EOR process, it is vital to study the salinity effect and temperature effect on surfactant adsorption. In this study, different surfactants species, temperature and salinity adsorption onto carbonate reservoirs were studied. The adsorption isotherms were fitted by Langmuir, Freundlich, Temkin and Linear models, and the first three models fitting effect were good. The results showed that cationic surfactants adsorption quantity was higher than anionic surfactants, and the non-ionic surfactants adsorption quantity was the lowest. When the temperature increased, the surfactants adsorption would decrease, because the adsorption process was exothermic process, and increasing temperature would inhibit the adsorption. The higher salinity would increase surfactants adsorption because higher salinity could compress electric double layer. In order to decrease surfactants adsorption, SiO2 nanoparticles and TiO2 nanoparticles were added to surfactants solutions, and then surfactants could adsorb onto nanoparticles surface, then the steric hindrance between surfactant molecules would increase, which could decrease surfactants adsorption. Contact angle results indicated that surfactants adsorption made the carbonate reservoir wettability alteration. In the end, surfactants (with or without SiO2 nanoparticles) adsorption onto carbonate reservoirs mechanism were studied by molecular dynamics simulation. The simulation results indicated that the surfactants molecules could adsorb onto SiO2 nanoparticles surface, and then the surfactants adsorption quantity onto carbonate rocks would decrease, which was in accordance with the experiments results.

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