Semantic Scholar extracted view of "Flotation of cassiterite using alkyl hydroxamates with different carbon chain lengths: A theoretical and experimental study" by Saizhen Jin et al. ... Flotation reagents are significant for modifying the interfacial characteristics of mineral grains to achieve the effective separation of minerals.
DOI: 10.1016/S0927-7757(01)01146-3 Corpus ID: 96907714; Surface chemistry and flotation of cassiterite with alkyl hydroxamates @article{Sreenivas2002SurfaceCA, title={Surface chemistry and flotation of cassiterite with alkyl hydroxamates}, author={T. Sreenivas and N. P. H. Padmanabhan}, journal={Colloids and Surfaces A: Physicochemical and Engineering …
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Semantic Scholar extracted view of "Practical aspects of oxide copper recovery with alkyl hydroxamates" by J. Lee et al. ... The mining industry aims to promote responsible chemical use during mineral processing operations to minimize the chemical contamination. ... 1 Excerpt; Save. Developing flotation reagents for niobium oxide recovery from ...
Quantum chemical calculations have been employed to understand the nature of interaction between alkyl hydroxamates and oxidized copper ore. The Material Studio 6.0 program (Accelrys, USA) has been used to model the surface-reagent interaction. As presented in the following sections, trends predicted on the basis of theoretically computed interaction energies …
Use of Hydroxamates Co-collectors. Hydroxamates are chelating collectors that are largely used as oxide collectors because they selectively form complexes with base metals . Lee et al. conducted a study on practical aspects of oxide copper recovery with alkyl hydroxamates through flotation case studies of seven different ores. Their study ...
Surface chemistry and flotation of cassiterite in the presence of alkyl hydroxamic acid/salt surfactant has been investigated. Results of the adsorption isotherms, electrokinetic and infrared ...
This work investigated the hydrophobic flocculation of cassiterite using four alkyl hydroxamic acids with varying carbon chain lengths, i.e., hexyl hydroxamate (C6), octyl hydroxamate (C8), decyl hydroxamate …
A brief overview of Suzuki couplings. Suzuki–Miyaura couplings, as noted in the introduction, are activated by combining reagents of carbon–boron with carbon halides and Pd, which acts as a base as well as a catalyst (Scheme 1A) [5,6,7].Palladium's effectiveness has aided in the rapid advancement of catalysis, allowing for the performance of coupling …
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This work investigated the hydrophobic flocculation of cassiterite using four alkyl hydroxamic acids with varying carbon chain lengths, i.e., hexyl hydroxamate (C6), octyl hydroxamate (C8), …
DOI: 10.1016/0892-6875(95)00134-4 Corpus ID: 94799773; Utilisation of hydroxamates in minerals froth flotation @article{Assis1996UtilisationOH, title={Utilisation of hydroxamates in minerals froth flotation}, author={Shan M. Assis and Luiz Cl{'a}udio Monteiro Montenegro and Ant{^o}nio Eduardo Clark Peres}, journal={Minerals Engineering}, year={1996}, volume={9}, …
After calculation, the value of N 1 was obtained as 6.5, which indicates that the alkyl chain length of about seven (octyl hydroxamic acid) is of great superiority in the synthetization of hydroxamic acid collector for cassiterite flotation, basically according with the flotation results. 3.2 Effect of metal cations on flotation of cassiterite ...
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The performance of alkyl phosphoric acid collector has been compared with other commercially used wolframite flotation reagents. The efficacy of the reagent was also tested using a low-grade ...
The effects of five alkyl hydroxamates (hexyl hydroxamate (C 6), octyl hydroxamate (C 8), decyl hydroxamate (C 10), dodecyl hydroxamate (C 12) and tetra-decyl hydroxamate (C 14)) with different carbon chain lengths on the flotation behaviour of cassiterite have been studied by using theoretical and experimental methods.Microflotation tests results …
In order to meet the requirements of increasingly lean, fine, and hybrid ores and environmental protection, flotation reagents are mainly developed in the following directions: (1) Using quantum chemical calculation, computer-aided molecular design methods, the principle of isomerism of flotation reagent, etc., the molecular structure design ...
ABSTRACT. Ausmelt is supplying commercial quantities of an alkyl hydroxamate flotation collector AM28 for flotation of oxide and supergene base metal ores and tailings. AM28 is a …
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This paper investigated the effect of five alkyl hydroxamates and two aromatic hydroxamates on the flotation of a synthetic ore composed of pure, fully liberated, malachite and quartz. Zeta potential measurements were used to aid in understanding reagent adsorption onto the surface of the two minerals.
Abstract. Following a critical review of the utilisation of chelating reagents (hydroxamates) in minerals flotation, results of a series of experiments performed in the …
Moreover, hydroxamate collectors, such as benzohydroxamic acid (Xian et al., 2001, Yin and Wang, 2014), naphthenic hydroxamates (Zhao et al., 2013) and amide hydroxamate (Deng et al., 2016), were also used for scheelite flotation in recent years. In fact, alkyl hydroxamates have been proved to be the selective and effective collectors for ...
The reagent IM-50 (a mixture of alkyl hydroxamic acids and their salts containing 7–9 carbon atoms) was developed in the Soviet Union and has shown to effectively float …
We have earlier reported results on this system using different families of flotation reagents, namely, oleate, alkyl hydroxamates (HXMA-8), octylimino-bis-methylene …
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Froth flotation is the single most important unit operation in mineral processing. One can selectively float any mineral from associated minerals in an ore provided an appropriate reagent is designed to make the given mineral surface, selectively and sufficiently hydrophobic so that it can attach to bubbles in the flotation cell and thus be collected in the froth layer.
Publisher Summary. This chapter discusses various aspects of PGM (platinum group metal) ores. In general, PGM ores are concentrates in the crust found in two different ways, by leaching the metal-rich lava (mantle) deposited into the crust, which is known as chemical weathering, especially in a hot climate where silica and magnesia are leached away, and melting a portion …
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Abstract The results of theoretical computations on the molecular modeling of mineral–reagent interactions in a fluorite-calcite-fluorapatite–alkyl hydroxamate separation system were found to correlate remarkably well with the experimental microflotation test results. The utility of molecular modeling tools in the design/screening of surfactant molecules for …
In this study, the effects of five alkyl hydroxamates with different carbon chain lengths (C 6, C 8, C 10, C 12 and C 14) on the flotation behaviour of cassiterite were studied …
A scientific design methodology based on molecular modeling tools available today is presented for arriving at the most suitable reagent combinations for a given flotation separation problem. The power and the utility of this approach are illustrated with examples taken mainly from our work on mineral flotation with alkyl hydroxamates.
The dominant flotation process currently used for processing of siliceous phosphates in Central Florida is the Crago "Double Float" process (Giesekke, 1985; Zhang et al., 1997).The simplified flotation flowsheet is given in Fig. 1.In this process, after desliming and sizing, the ore is conditioned with fatty acids and fuel oil at a pH of 9.0–9.5.
Bastnaesite, a rare-earth fluocarbonate, was separated from associated calcite and barite gangue minerals in the Mountain Pass, CA rare-earth ore beneficiation plant by froth flotation using fatty acids (tall oil) collector, lignin sulfonate depressant and soda ash modifier after high-temperature (steam) conditioning with reagents. Starting with a feed grade of 7.6% …
Surface chemistry and flotation of cassiterite in the presence of alkyl hydroxamic acid/salt surfactant has been investigated. Results of the adsorption isotherms, electrokinetic …
The design and screening of flotation reagents developed specifically for scheelite flotation should take into account the differences in surface properties of the involved minerals, such as ...
