Pure Amines for the Flotation of Silica from Rougher Phosphate Concentrate

Lents, Thomas; Terry, David; Wittcoff, Harold

doi:10.1021/ie50543a041

Cited by 2 publications

(1 citation statement)

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“…Saturated primary amines with chain lengths of 12 and 14 carbon atoms tend to be more efficient than the saturated Clo, Clo and Cls homologs for floating silica from phosphate. Amines that contain monounsaturated Cls (oleyl) along with saturated C16 and Cls carbon chains are almost as efficient as the C1., and C14 amines for this purpose (1). Mixed alkyl groups of this type occur naturally in tallow.…”

Section: Introductionmentioning

confidence: 99%

Cationic flotation of silica from magnetic iron‐ore concentrates

Hedberg

1970

J Americ Oil Chem Soc

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Twelve cationic, amine-salt silica-collectors were evaluated on three samples of magnetic iron-ore concentrate. Coco primary amine acetate was used as the standard of comparison. Lauryl primary amine acetate is somewhat more efficient in collecting silica than the standard, and equally selective. Tallow primary amine acetate is equally selective and somewhat less efficient than the the standard. Coco diamine is more selective and somewhat more efficient than the standard. Oleyl and tallow diamines are more selective and somewhat less efficient than the standard. Trimethyl alkyl ammonium chloride compounds are more selective but less efficient than primary amines and diamines. Selectivity, in general, is inversely proportional to efficiency (silica pulling strength). Strong collectors, in other words, tend to float small amounts of iron along with the silica. Finely ground (90% less than 325 mesh or finer) magnetic concentrates with iron and silica almost completely liberated are highly responsive to upgrading. Concentrates of the same fine mesh size but containing unliberated iron-silicate are less responsive.

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Section: Introductionmentioning

confidence: 99%