Investigation of Langmuir monofilms and flotation experiments with anionic/cationic collector mixtures

Helbig, C.; Baldauf, H.; Mahnke, J.; Stöckelhuber, Klaus Werner; Schulze, Hans

doi:10.1016/s0301-7516(97)00077-x

Cited by 49 publications

(24 citation statements)

References 5 publications

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“…phosphate) in nature. Phosphates form the backbone of adenosine triphosphate, which stores the chemical energy used in biological systems, and they are also the primary components of the bones and teeth in humans (Arnold and Gaengler, 2007;Helbig et al, 1998a). In its synthetic form, phosphorous is used as a fertilizer and is one of the three primary nutrients for plants.…”

Section: Introductionmentioning

confidence: 99%

“…Synergists could improve the adsorption of oleate ions at the liquid/air interface and to the phosphate surface (Sis and Chander, 2003a,b). In addition, synergists help to prevent the detrimental effects of slime and calcium ions on collector efficiency (Helbig et al, 1998b). Ethoxylated nonylphenol with four oxyethyl groups (NP-4) is a typical non-ionic synergist.…”

Section: Introductionmentioning

confidence: 99%

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A mixed collector system for phosphate flotation

Cao

Cheng

Wen

et al. 2015

Minerals Engineering

125

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a b s t r a c tFlotation has been used in industry for more than a half century as the primary technique for upgrading phosphate. While the flotation of phosphate was inefficient when oleic acid was used alone as a collector, therefore a mixed collector of oleic acid (HOl), linoleic acid (LA) and linolenic acid (LNA) was employed to improve the recovery of phosphate flotation. The batch flotation results showed that the optimal composition of the mixed collector was 54 wt.% HOl, 36 wt.% LA and 10 wt.% LNA. Additionally, the effect of pH on the mixed collector application was studied while considering the surface tension, contact angle and micro-flotation. The results showed that the mixed collector should be used at a pH of 9.5. Above a pH of 9.5, the adsorption of fatty acids dimers on the apatite surface hindered phosphate flotation. The influence of the mixed collector assembly on apatite flotation was also investigated. It was demonstrated that due to its low critical micelle concentration, a sufficiently hydrophobic apatite surface could be generated at a collector concentration of 60 mg/L. In addition, zeta potential experiments suggested that collector adsorption was governed by chemisorption. FTIR and XPS spectra studies further indicated that the chemical reaction involved the carboxyl groups of fatty acids and Ca species at the apatite surface for each fatty acid in the mixed collector.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A mixed collector system for phosphate flotation

Cao

Cheng

Wen

et al. 2015

Minerals Engineering

125

View full text Add to dashboard Cite

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“…[43][44][45] In this study, the mixed collectors, anionic petroleum sulphonate promoter (Aero 801) and anionic alkyl succinamate promoter (Aero 830) were used and gave the best results in terms of kyanite grade and overall recovery. A good correlation between the adsorption of collectors and zeta potentials was also evidenced (Fig.…”

Section: Resultsmentioning

confidence: 99%

The beneficiation of Bitlis Massif kyanite ore for use in ceramic materials

Ayhan¹,

Bayat²,

Poole³

2004

Mineral Processing and Extractive Metallurgy

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A beneficiation procedure for possible refractory uses of Bitlis Massif (Turkey) kyanite ore has been developed and involves grinding to d 80 = 0•106 mm, de-sliming, mica flotation, iron oxide flotation and kyanite flotation. A concentrate containing 56and 0•02% MgO was obtained at a mass recovery of 51•14% ± 0•25%. This conforms to both the chemical and size specifications for ceramic uses required to meet American and Chinese standards.

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“…The FTIR spectra were obtained with a PerkinElmer Spectrum 2000 FTIR Diffuse Reflectance Spectrometer. The PerkinElmer Spectrum One FTIR Spectrometer is capable of data collection over a wave number range of 370-7800 cm 21 . About 10 wt-% of the samples (25 mm fraction) was mixed with spectroscopic grade KBr with a refractive index of 1?559 and a particle size of 1-5 mm.…”

Section: Diffuse Reflectance Ftir Measurementsmentioning

confidence: 99%

Smithsonite flotation using mixed anionic/cationic collector

Hosseini

Forssberg

2009

Mineral Processing and Extractive Metallurgy

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The surface interaction and adsorption of the components in a mixture of surfactants are of considerable interest for both practical and theoretical reasons. The flotation behaviour of smithsonite in the presence of sodium sulphide (Na 2 S) and a mixture of potassium amyl xanthate (KAX) and dodecylamine (DDA) and its adsorption on smithsonite surface at various concentration ratios have been investigated using zeta potential, contact angle, microflotation and diffuse reflectance FTIR studies. The smithsonite mineral has weak response to flotation in the presence of KAX alone as a collector. The presence of KAX enhanced the amine flotation recovery in the presence of sodium sulphide. The flotation results using mixed collectors showed the maximum recovery and contact angle were 95?5% and 104u at pH 12 respectively. The FTIR spectra revealed the coadsorption as amine-xanthate complex when mixed collector is used. The presence of KAX increased the DDA adsorption due to decrease in the electrostatic head-head repulsion between the two adjacent surface ammonium head group cations because the anionic KAX sitting between these two cations screens the electrostatic repulsion and increased the lateral tail-tail hydrophobic bonds.

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Investigation of Langmuir monofilms and flotation experiments with anionic/cationic collector mixtures

Cited by 49 publications

References 5 publications

A mixed collector system for phosphate flotation

A mixed collector system for phosphate flotation

The beneficiation of Bitlis Massif kyanite ore for use in ceramic materials

Smithsonite flotation using mixed anionic/cationic collector

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