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Sökning: onr:"swepub:oai:research.chalmers.se:5688c4bd-edbb-4ed3-bc7d-7349236dec02" > Flotation selectivi...

Flotation selectivity of novel alkyl dicarboxylate reagents for apatite-calcite separation

Karlkvist, T. (författare)
Luleå University of Technology (LTU),Luleå tekniska universitet (LTU)
Patra, A. (författare)
Luleå University of Technology (LTU),Luleå tekniska universitet (LTU)
Rao, K. H. (författare)
Luleå University of Technology (LTU),Luleå tekniska universitet (LTU)
visa fler...
Bordes, Romain, 1981 (författare)
Chalmers University of Technology,Chalmers tekniska högskola,Chalmers University of Technology, Chalmers University of Technology, Department of Chemical and Biological Engineering
Holmberg, Krister, 1946 (författare)
Chalmers University of Technology,Chalmers tekniska högskola,Chalmers University of Technology, Chalmers University of Technology, Department of Chemical and Biological Engineering
Patra, Anuttam (författare)
Luleå tekniska universitet,Mineralteknik och metallurgi
Kota, Hanumantha Rao (författare)
Luleå tekniska universitet,Mineralteknik och metallurgi
Karlkvist, Tommy (författare)
Luleå tekniska universitet,Mineralteknik och metallurgi
visa färre...
 (creator_code:org_t)
2015
2015
Engelska.
Ingår i: Journal of Colloid and Interface Science. - 0021-9797 .- 1095-7103. ; 445, s. 40-47
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • The investigation aims to demonstrate the conceptual thoughts behind developing mineral specific reagents for use in flotation of calcium containing ores. For this purpose, a series of dicarboxylate-based surfactants with varying distance between the carboxylate groups (one, two or three methylene groups) was synthesized. A surfactant with the same alkyl chain length but with only one carboxylate group was also synthesized and evaluated. The adsorption behavior of these new reagents on pure apatite and pure calcite surfaces was studied using Hallimond tube flotation, FTIR and zeta potential measurements. The relation between the adsorption behavior of a given surfactant at a specific mineral surface and its molecular structure over a range of concentrations and pH values, as well as the region of maximum recovery, was established. It was found that one of the reagents, with a specific distance between the carboxylate groups, was much more selective for a particular mineral surface than the other homologues. For example, out of the four compounds synthesized, only the one where the carboxylate groups were separated by a single methylene group floated apatite but not calcite, whereas calcite was efficiently floated with the monocarboxylic reagent, but not with the other reagents synthesized. This selective adsorption of a given surfactant to a particular mineral surface relative to other mineral surfaces as evidenced in the flotation studies was substantiated by zeta potential and infra-red spectroscopy data.

Ämnesord

NATURVETENSKAP  -- Kemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)
ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
TEKNIK OCH TEKNOLOGIER  -- Materialteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Materials Engineering (hsv//eng)

Nyckelord

Monolayers
Acids
Froth flotation
Surfaces
Adsorption
Mineral processing
Surfactant
Crystallization
Mineral specific reagents
Surfactants
Mineral Processing
Mineralteknik

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