Collector for sulfide ores

Details Collector for sulfide ores Collector for sulfide ores

2006-07-21

2009-06-30

Shiao, Rei-tsang (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus esters

Reexamination Certificate

active

07553984

ABSTRACT:
A method for the flotation of sulfide ores is disclosed. The method comprises contacting the sulfide ores with a composition comprising at least one compound of the formulawhereR1, R2and R3independently of one another are alkyl groups having 1 to 18 carbon atoms, alkenyl groups having 2 to 18 carbon atoms, aryl groups having 6 to 10 carbon atoms, or alkylaryl groups having 7 to 10 carbon atoms. Also disclosed is the process for preparing the above compound.

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Klee et al., Journal of Pharmaceutical Sciences, 1962, 51, 423-427.
Florence Klee et al., “Thiophosphoric Acid Derivatives of Ethylamine, dl-Methionine, and I-Proline Ethyl Esters”, J. of Pharmaceutical Sci., vol. 51, 1962, pp. 423-427.
Chen Hu, Huaxue Xuebao, (Beilstein Online—Reaction IDS: 183831; 662317; 72722; 68756; 854051), (1956) vol. 22, p. 219.
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Hienrich Schubert, “Aufbereitung fester mineralischer Rohstoffe”, Band II, 1977, pp. 296-305.
English Abstract of DE 40 40 475, Jul. 4, 1991.

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