Role of pH on the adsorption of xanthate and dithiophosphinate onto galena

Elizondo-Álvarez, Martha Araceli; Dávila-Pulido, G.I.; Bello-Teodoro, S.; Uribe‐Salas, A.

doi:10.1080/00084433.2018.1514202

Cited by 16 publications

(4 citation statements)

References 21 publications

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“…Herein, all the peaks observed in the orange curve were attributed to the barite sample in agreement with previous reports. , Similarly, the results for celestite (shown in green) are supported by previous literature reports. , With regard to sulfide scales, XRD confirmed that the sample used herein is pure PbS. All the peaks, shown in purple at 2 theta of 26, 30, 43.5, 51, 63, 69, and 71° are for PbS. − Pyrite sample results are given elsewhere, whereas the four peaks at 30, 34.5, 44, and 53.5° (in red color) are for pyrrhotite. − Finally, carbonate scales are studied using the CaCO 3 sample with the XRD peaks illustrated in black and are in agreement with the published literature. , All samples were pure minerals as confirmed by the XRD results.…”

Section: Resultssupporting

confidence: 91%

Dissolution Kinetics of Different Inorganic Oilfield Scales in Green Formulations

et al. 2020

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Scale mineral deposition is a critical problem that hinders the daily production of oil and gas fields. Chemical removal of these scales, based on the scale type, is common. In this paper, borax and diethylene tremaine penta acetic (DTPA) acid-based formulations are used for the removal of sulfides, carbonates, and sulfate scales. In particular, the dissolution rates of sulfide (pyrite, pyrrhotite, and galena), sulfate (celestite and barite), and carbonate (calcite) scales were investigated in a rotating disc apparatus at typical well conditions. Scanning electron microscopy–energy-dispersive X-ray and X-ray diffraction analyses were performed for characterizing scale composition and type. The effect of temperature, scale type, and formulation on the dissolution rate is studied. Even though borax formulation has been developed for the sulfide scale removal, it showed a high dissolution rate for the carbonate scale (7.23 × 10–7 mol·L–1·s–1·cm–2). For the sulfide scale, the highest dissolution in borax formulation was obtained with galena (lead sulfide, PbS), followed by pyrrhotite, and the lowest dissolution was reported for pyrite (1.55 × 10–8 mol·L–1·s–1·cm–2). Borax formulation was found to be inefficient in the removal of sulfate scales with a dissolution rate lower than carbonate and sulfide scales by 3 and 2 orders of magnitude, respectively. Similarly, DTPA-based formulation has yielded the highest dissolution for the carbonate scale (7.98 × 10–6 mol·L–1·s–1·cm–2). However, for sulfate, DTPA-based formulation showed better performance than borax. The increase in temperature leads to an increase in the dissolution rate for almost all types of scales; however, DTPA-based formulation showed improved performance with temperature. Both formulations are efficient in removing sulfate- and sulfide-rich scales. The experimental results of DTPA have been validated by density functional theory calculations of binding energies between DTPA and metal ions present in the mixed scale.

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Section: Resultssupporting

confidence: 91%

Dissolution Kinetics of Different Inorganic Oilfield Scales in Green Formulations

et al. 2020

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“…In this process pH plays an important role on galena recovery. For an increase of pH from 7.5-9.5 [14] in flotation cell, the lead recovery gets decreased by about 10 %. [15] This is reported to occur with pyrite (FeS2), arsenopyrite (FeAsS) and pyrrhotite (Fe(1-x)S) minerals.…”

Section: Chemical Phenomenamentioning

confidence: 99%

Froth flotation process and its application

Mondal

Acharjee

Mandal

et al. 2021

Vietnam Journal of Chemistry

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The paper is about the froth flotation process and its application. It is a metallurgical process for the extraction of metals in a pure state from their ores: especially for sulfide ores. Froth flotation is one of the steps which is generally performed before roasting and it deals with the surface chemistry of liquids and of the minerals to be separated. This process requires a particular setup to be performed which contains different components. Surfactants play the most important role here. Different types of surfactants are used in different ways and each of them plays a crucial role like, collectors, frothers, froth stabilizers, depressants and activators, pH regulators etc. The sulfide ore flotation process can be studied by both chemical and electrochemical phenomena considering the interfacial energies. A broad application of this process in industrial field is the flotation of iron ores which is of two types: direct and reverse flotation. The later one is again based on two different types as cationic and anionic reverse flotation. In all these processes different types of flotation reagents are used. Another application is separation of malachite and azurite ore using sulfidization flotation.

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“…Therefore, in this case, the use of blend types of dithiophosphate and thiocarbamate chemicals will be more effective in coating the entire chemical surface (McFadzean, 2013). As an active topic in flotation literature since the 1930s (Swainson and Anderson, 1931;Herd and Ure, 1941;Gaudin et al, 1942) investigation on the flotation properties and surface interactions on galena and pyrite-xanthate systems in the presence of different xanthate compounds were continued in several recent studies (Elizondo et al, 2018;Ozun and Ergen, 2019;Cuı et al, 2021). Many of these studies have been focused on the selective separation of galena and pyrite from other sulfides or gangue minerals and the obtained results have supported the fundamentals of galena/pyrite-xanthate interaction and confirmed the effectiveness of xanthates in both galena and pyrite flotation systems.…”

Section: Introductionmentioning

confidence: 99%

Surface chemistry and flotation properties of galena and pyrite particles in the presence of xanthate- monothiophosphate- thiocarbamate collectors

Ercelik,

Terzi,

Kursun

et al. 2023

Physicochem. Probl. Miner. Process.

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In this study, surface chemistry and flotation properties of the gold-bearing galena and pyrite minerals of Menderes region, Izmir, Turkey were investigated with the use of xanthate-thiocarbamate-monothiophosphate collectors. In this context, the micro-flotation experiments, the zeta potential, and bubble-particle attachment time measurements were conducted in the presence of Thiophosphate (Aero S-8045), Xanthate (SIBX), and Thiocarbamate (Aero float MX-505) collectors. In the case of micro-flotation experiments, the MX-505 exhibited higher flotation efficiency for both minerals compared to SIBX and S-8045 collectors. In the case of zeta potential experiments as a function of pH, the galena mineral showed a negative charge at pH 5 and 11, no point of zero charge (pzc) was determined, and the pzc of pyrite was determined as pH≈8. The bubble-particle attachment time experiments performed in the presence of S-8045, SIBX, and MX-505 collectors indicated that the attachment efficiency was 100% in the presence of MX-505 at all dosages and contact times. These results revealed that there was an extraordinarily strong interaction between the galena/pyrite and the air bubbles in the presence of MX-505. The results obtained within this study indicated that galena and pyrite minerals showed inherently low natural floatability which can only be enhanced under specific conditions. In the tests conducted on these minerals, galena mineral showed higher natural floatability compared to pyrite mineral, and collectors produced from thiocarbamates have shown greater effectiveness compared to xanthate and thiophosphate.

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Role of pH on the adsorption of xanthate and dithiophosphinate onto galena

Cited by 16 publications

References 21 publications

Dissolution Kinetics of Different Inorganic Oilfield Scales in Green Formulations

Dissolution Kinetics of Different Inorganic Oilfield Scales in Green Formulations

Froth flotation process and its application

Surface chemistry and flotation properties of galena and pyrite particles in the presence of xanthate- monothiophosphate- thiocarbamate collectors

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