Hydrometallurgical treatment of Beylikahır rare earth preconcentrate

Kul, Mehmet


Hydrothermal synthesis of 3D TiO2 nanostructures using nitric acid: Characterization and evolution mechanism
Erdogan, Nursev; Öztürk, Abdullah; Park, Jongee (Elsevier BV, 2016-4)
Various morphologies of TiO2 nanostructures were synthesized by HNO3 assisted hydrothermal treatment with respect to the acid molarity (1 M, 3 M, and 8 M), temperature (110, 140, and 180 degrees C), and time (1, 3, and 6 h). An additional sample was synthesized inside the protonated titanate nanoribbon coated vessel with the acid molarity of 8M at 140 degrees C for 3 h. The crystal structure and morphology of the nanostructures synthesized were investigated using X-Ray diffractometer, scanning electron micr...
Sustainable Debinding and Recovery of CO2-Soluble Binders
Dilek Hacıhabiboğlu, Çerağ; Enick, Robert M.; Gulari, Esin; Manke, Charles W. (2012-07-04)
Metal and ceramic forming applications using conventional binders are associated with a number of environmental problems such as toxic emissions and carcinogenic wastes released from conventional binder removal processes. Here, we examine several materials as possible binder candidates for a sustainable technology wherein the binder can be recovered and recycled by supercritical carbon dioxide. The candidates include an acetylated sugar, beta-D-galactose pentaacetate, and two tert-butyl aromatics, 1,3,5-tri...
Solvent extraction behaviour of scandium from lateritic nickel-cobalt ores using different organic reagents
Ferizoglu, Ece; Kaya, Serap; Topkaya, Yavuz Ali (2018-04-01)
Scandium is one of the most important and strategic metals that can be recovered as a by-product from lateritic nickel-cobalt ores. In this research, different extractants were investigated to extract scandium from sulphate medium by using solvent extraction method. Generally, the organic extractants are classified as acidic, neutral and basic reagents. Thus, the aim of the present study was to compare scandium extraction efficiencies of some acidic, neutral and basic organic reagents. For this reason, Ionq...
Surface energy and excess charge in (1x2)-reconstructed rutile TiO2(110) from DFT plus U calculations
Unal, Hatice; METE, ERSEN; Ellialtıoğlu, Süleyman Şinasi (2011-09-09)
Physically reasonable electronic structures of reconstructed rutile TiO2(110)-(1x2) surfaces were studied using density functional theory (DFT) supplemented with Hubbard U on-site Coulomb repulsion acting on the d electrons, the so called DFT + U approach. Two leading reconstruction models proposed by Onishi and Iwasawa [Surf. Sci. Lett. 313, 783 (1994)] and Park and coworkers [Phys. Rev. B 75, 245415 (2007)] were compared in terms of their thermodynamic stabilities.
Hydrothermal synthesis of rare earth ions doped LaBO3 and GdBO3 and their photoluminescence properties
Vahed Qaramaleki, Saeed; Üner, Deniz; Yılmaz, Ayşen; Department of Chemical Engineering (2016)
Within the scope of this research project three different rare earth elements such as Dysprosium (Dy), Terbium (Tb) and Samarium (Sm) have been doped inside two different host material namely LaBO3 and GdBO3 orthoborates. The preparation of materials were conducted at low temperature by hydrothermal synthesis method. After preparing the solution of precursors it has been placed into a well-sealed Teflon lined autoclave and maintained in 200 ˚C inside a furnace for 24 hours. The obtained powder was then wash...
Citation Formats
M. Kul, “Hydrometallurgical treatment of Beylikahır rare earth preconcentrate,” Ph.D. - Doctoral Program, Middle East Technical University, 2003.