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

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

Karlkvist, Tommy (author): Luleå tekniska universitet,Mineralteknik och metallurgi

Patra, Anuttam (author): Luleå tekniska universitet,Kemiteknik

Bordes, Romain, 1981 (author): Chalmers tekniska högskola,Chalmers University of Technology,Department of Chemical and Biological Engineering, Chalmers University of Technology

Holmberg, Krister, 1946 (author): Chalmers tekniska högskola,Chalmers University of Technology,Department of Chemical and Biological Engineering, Chalmers University of Technology

Rao, Hanumantha (author): Norges teknisk-naturvitenskapelige universitet (NTNU),Norwegian University of Science and Technology (NTNU),Norwegian University of Science and Technology (NTNU), Trondheim

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(creator_code:org_t)

2016-11-07
2016
English.
In: Tenside, Surfactants, Detergents. - : Walter de Gruyter GmbH. - 0932-3414 .- 2195-8564. ; 53:6, s. 516-523

Related links:: http://dx.doi.org/10...; show more...; https://doi.org/10.3...; https://research.cha...; https://urn.kb.se/re...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

A series of amino acid-based surfactants with a fixed alkyl chain length and with two carboxyl groups separated by a spacer of one, two or three carbon atoms have been synthesized and evaluated as potential collectors for flotation of calcite and fluorite. A monocarboxylate amino acid-based surfactant having the same length of the hydrocarbon tail was also included for comparison in the study. Experiments using a Hallimond flotation tube showed that although the flotation reagents solely differ in terms of spacer, their efficacy in terms of flotation recovery varied very much. Whereas on calcite at pH 10.5 only the monocarboxylate collector gave a high yield, on fluorite at the same pH both the monocarboxylate and the dicarboxylate collectors with one carbon between the carboxyl groups gave good results. On calcite at the natural pH the monocarboxylate collector was most efficient but the dicarboxylate collectors with a two and a three-carbon spacer also gave a reasonable recovery. On fluorite at the natural pH the dicarboxylate collectors with a two- and a three-carbon spacer were most efficient. The zeta-potential and the flotation recovery of the mineral particles as a function of added collector were assessed and the adsorption was also monitored by diffuse reflectance infra-red spectroscopy. Taken together, the results showed that small changes in the head group region of the collector can radically affect flotation recovery. This type of knowledge is important to understand flotation selectivity in a mixture of similar minerals.

Subject headings

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

Keyword

surfactant
adsorption
mineral specific reagents
mineral processing
Froth flotation
Mineral Processing
Framtidens gruvor (FOI)

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art (subject category)
ref (subject category)

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By the author/editor: Karlkvist, Tommy; Patra, Anuttam; Bordes, Romain, ...; Holmberg, Kriste ...; Rao, Hanumantha

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ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Chemical Enginee ...; and Other Chemical E ...

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Metallurgy and M ...

Articles in the publication: Tenside, Surfact ...

By the university: Chalmers University of Technology; Luleå University of Technology

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