Influence of Br Modification on Collecting Property of Dodecanoic Acid

Abstract:

Bromine atom with strong electronegativity was introduced to a position of dodecanoic acid as a new type collector DZF-3 in iron ore flotation. The structure of DZF-3 synthesized in the paper is verified by FT-IR and ¹H-NMR. And the collecting performances of DZF-3 are also presented through a series of flotation experiments of single minerals. Results show that DZF-3 is a kind of efficient collector especially used in room temperature in reverse flotation. Moreover, DZF-3 can collect quartz particles without activated by CaCl₂. Mechanism analysis shows that electronegativity and collecting performance of the collecting group-COO^- are increased by bromine atom. The enhancement of electronegative of dodecanoic acid by Br substituted in a position results in the competitive adsorption among active sites of Br atom and O atoms of carboxyl group with hydroxyl of quartz surface, then there occurs a chemical reaction between the Siⁿ⁺(n= 0-4) in quartz surface and active sites in DZF-3 molecules.

• Periodical: Advanced Materials Research (Volume 826)
• Pages: 68-74
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.826.68
• Online since: November 2013
• Authors: Yi Min Zhu*, Bin Bin Luo, Jin Yue Mi
• Keywords: Activation, Collector, Hematite, Mechanism, Reverse Flotation

References

[1] EW Giesekke, PJ Harris: Use of poly oxyeth ethylene compound in flotation of Fluorite with fatty acid. Chang Scopes Miners Process, 1990 (6), 227-230.

[2] A. M. Komley, L. N. Zakharova, E. A. Vershinin: Synthesis and properties of new flotation reagents. Obogashch. Rud, 1976, 25 (6): 29-33.

[3] A. M. Marabini, M Cirlachi, P Plescia, et al: Chelating reagents for flotation, Minerals Engineering, 2007, 10: 1014-1025.

DOI: 10.1016/j.mineng.2007.03.012

[4] D. R Nagarai, S. S Wang: Polymeric depressant with acrylamide for separation of silicate gangue in froth flotation of sulfide ore. INTERNATIONAL TOURNAL OF MINERAL PROCESSING, 1996, 30(5): 21-28.

[5] R.L.R. Reis, A.E.C. Peres and A.C. Araujo, Corn grits: A new depressant agent for the flotation of iron and phosphate rocks. Proceedings II International Mineral Processing Symposium, Izmir, 1989: 73-89.

[6] P.K. Weissenborn: Behavior of amyl pectin and amylase components of starch in the selective flotation of ultra fine iron ore. Int. J. Miner. Process. 1996, 47: 197-211.

[7] R T Sanderson. Polar Covalance. (Academic Press, New York 1983).

[8] R T Sanderson. Chemical Bond and Bond Energies. (Academic Press, New York 1976).

[9] C. Hansch, A. Lev: Substituent Constants for Correlation Analysis in Chemistry and Biology. Wiley Inter. Science, New York, (1979).

[10] Quast: A review of hematite flotation using 12-carbon chain collector. Minerals Engineering, 2000(13): 1361-1376.

DOI: 10.1016/s0892-6875(00)00119-9

[11] J. Mullay: Atomic and Group Eletronegativities. JAm Chem Soc, 1984, 106: 5842-5847.

[12] W. S Peng, G. K Liu: Infrared Spectra (Science Press, Beijing 1982).

[13] L.S. Leal Filho, P.R. Seidl, J.C.G. Correia and L.C.K. Cerqueira: Molecular modeling of reagents for flotation processes. Minerals Engineering, Vol. 13, No. 14-15 (2000): 1495-1503.

DOI: 10.1016/s0892-6875(00)00133-3