Extraction of some transition metals with N,N-dibutyl-N '-benzoylthiourea into molten paraffin at 65 degrees C

Merdivan, M
Gungor, A
Savasci, S
Aygün, Rüveyde Sezer
The solid-liquid extraction behaviour of some transition metals (Cu(II), Co(II), Ni(II), Cd(II) and Pb(II)) by the use of N,N-dibutyl-N'-benzoylthiourea as an extractant in paraffin (58-60 degrees C) has been investigated at 65.0 +/- 0.5 degrees C. The effect of equilibration time, pH of the aqueous phase, concentration of extractant and solid solvent used on the extraction efficiency of these metals have been discussed. The interferences of various ions are examined. The method has been applied to the determination of these metals in synthetic samples, mushrooms and sediment.


Preparation of lead zirconate titanate (Pb(Zr0.52Ti0.48)O-3) by homogeneous precipitation and calcination
Oren, EE; Tas, AC (1998-05-06)
Aqueous solutions of lead chloride (PbCl2), zirconium oxychloride (ZrOCl2.8H(2)O) and titanium tetrachloride (TiCl4), in appropriate volumetric amounts, were used as the starting materials in the synthesis of phase-pure Pb(Zr0.52Ti0.48)O-3 powders. Preparation of the phase-pure PZT powders were achieved, in the presence of urea (CH4N2O), by the chemical powder synthesis route of homogeneous precipitation.
Preparation and microstructure of sol-gel derived silver-doped silica
Akkopru, Betul; Durucan, Caner (2007-08-01)
Silver-doped silica was prepared by hydrolysis and condensation of tetraethyl orthosilicate (TEOS, Si(OC2H5)(4)) in the presence of a silver nitrate (AgNO3) solution by two different synthesis methods. In the first synthesis route, sol-gel mixtures were prepared using an acid catalyst. In the second synthesis route, silver-doped silica gels were formed by two-step acid/base catalysis. For the same concentration of silver dopant [AgNO3]/[TEOS] = 0.015 acid-catalyzed sol-gel formed a microporous silica with a...
Extraction of nickel and cobalt from lateritic ores by nitric acid /
Saka, Onur; Topkaya, Yavuz Ali; Department of Metallurgical and Materials Engineering (2014)
This thesis study is related to the extraction kinetics of nickel and cobalt from lateritic nickel ores from Gördes/Manisa region of Turkey. The experimental studies involved the optimization of nitric acid leaching of nickel laterite ores at atmospheric pressure for high nickel and cobalt extraction. The main parameters optimized after the characterization of laterites were the nitric acid concentration, leaching temperature, duration of leaching and the particle size of the ore sample. The atmospheric lea...
Isolation of volatile oil from thyme (Thymbra spicata) by steam distillation
Hanci, SS; Şahin, Serpil; Yılmaz, Levent (2003-08-01)
The effects of steam flow rate (1.03 and 0.64 L/h), distillation time, and particle size (0.50, 1.00, 2.05 mm) of Thymbra spicata on essential oil yield and sequence of extraction of compounds were studied. A logarithmic model fitted well to experimental data. The composition of the essential oil obtained by steam distillation was investigated for whole leaves only since the grinding had an adverse effect on yield. The oil obtained was very rich with respect to its carvacrol content. For both steam flow rat...
Synthesis and characterization of poly(dibromophenylene oxide)s through thermal decomposition of various transition metal complexes in solid state.
Şanlı, Pınar; Kısakürek, Duygu; Aras, Leyla; Department of Chemistry (2002)
In this study, synthesis and characterization of poly(dibromophenylene oxide)s though thermal decomposition of bis(2,4,6-tribromophenolato)di(N- methyl imidazole) Cu(II), bis(2,4,6-tribromophenolato)di(N-methyl illimidazole)Co(II) and bis(2,4,6-tribromophenolato)di(N-methyl imidazole)Ni(II) complexes in solid state was examined. For the characterization of complexes FTIR, DSC, mass spectroscopy, magnetic susceptibility and C, H,N elemental analysis were performed. Syntheses of the polymer were achieved by t...
Citation Formats
M. Merdivan, A. Gungor, S. Savasci, and R. S. Aygün, “Extraction of some transition metals with N,N-dibutyl-N ’-benzoylthiourea into molten paraffin at 65 degrees C,” TALANTA, pp. 141–146, 2000, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/56910.