Dodecyl amine adsorption at different interfaces during bubble attachment/detachment at a silica surface

• Autorzy: Wang X. , Miller J. D.

Identyfikatory

DOI

10.5277/ppmp1809

• Języki publikacji: EN

Abstrakty

EN

The reverse flotation of quartz and other gangue silicate minerals with alkyl amines is an important and well known strategy for the processing of iron ore, low grade bauxite ore, and phosphate rock. Some details of amine adsorption by quartz have been described in the literature, but little is known about the disposition of amine during bubble attachment. Now, a new experimental procedure involving vibrational sum frequency spectroscopy (VSFS) has been developed to provide, for the first time, a more detailed analysis of the state of dodecyl amine (DDA) adsorption at different interfaces during bubble attachment/detachment at a silica surface. The results show that the hydrophobic surface state at the silica surface is created by the transfer of a well-organized monolayer of DDA from the bubble surface to the silica surface during bubble contact and attachment.

Słowa kluczowe

EN

VSFS; air bubble attachment; amine adsorption density

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2018
• Tom: Vol. 54, iss. 1
• Strony: 81--88
• Opis fizyczny: Bibliogr. 17 poz., rys., tab.

Twórcy

autor

Wang X.

• University of Utah, College of Mines and Earth Sciences, Department of Metallurgical Engineering, 135 South 1460 East, Rm 412, Salt Lake City, UT 84112

autor

Miller J. D.

• University of Utah, College of Mines and Earth Sciences, Department of Metallurgical Engineering, 135 South 1460 East, Rm 412, Salt Lake City, UT 84112

Bibliografia

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