Application of Methylphosphonic Acid Monoalkyl Esters to the Extraction of Some Metals

1994 ◽  
Vol 59 (2) ◽  
pp. 287-293 ◽  
Author(s):  
Oldřich Navrátil ◽  
Petr Sládek
Keyword(s):  
Nitric Acid ◽  
Methylphosphonic Acid ◽  
Alkyl Groups ◽  
Extraction Constants ◽  
Monoalkyl Esters ◽  
Aqueous Nitric Acid

The distribution between aqueous nitric acid and benzene was examined for methylphosphonic acid monoalkyl esters where the alkyl was a methyl, propyl, butyl, isobutyl, pentyl, 2-methylbutyl, cyclohexyl or 1,2,2-trimethylpropyl group. The extraction of complexes of these reagents with Ag, Co, Zn, Sc, Yb, Eu and Hf was also investigated. The esters do not dimerize in benzene. The pKa and KD values of the reagents and the corresponding extraction constants were determined. Derivatives containing five and more carbon atoms in the alkyl groups were found practically applicable to the extraction.

Electrochemical behaviour of galena (PbS) in aqueous nitric acid and perchloric acid solutions

2004 ◽  
Vol 34 (1) ◽  
pp. 37-46 ◽  
Author(s):  
Yu. Mikhlin ◽  
A. Kuklinskiy ◽  
E. Mikhlina ◽  
V. Kargin ◽  
I. Asanov
Keyword(s):  
Nitric Acid ◽  
Perchloric Acid ◽  
Electrochemical Behaviour ◽  
Acid Solutions ◽  
Aqueous Nitric Acid

scholarly journals Direct Observation of Ion Pairing in Aqueous Nitric Acid Using 2D Infrared Spectroscopy

2018 ◽  
Vol 123 (1) ◽  
pp. 225-238 ◽  
Author(s):  
Nicholas H. C. Lewis ◽  
Joseph A. Fournier ◽  
William B. Carpenter ◽  
Andrei Tokmakoff
Keyword(s):  
Infrared Spectroscopy ◽  
Nitric Acid ◽  
Direct Observation ◽  
Ion Pairing ◽  
Aqueous Nitric Acid

ELECTROCHEMICAL PERFORMANCE OF ORDERED MESOPOROUS CARBON MODIFIED BY OXIDATIVE TREATMENT WITH AQUEOUS NITRIC ACID

2016 ◽  
Vol 78 (3-2) ◽  
Author(s):  
Nur Izzatie Hannah Razman ◽  
Salasiah Endud ◽  
Izan Izwan Misnon ◽  
Zainab Ramli
Keyword(s):  
Electron Microscopy ◽  
Nitric Acid ◽  
Electrochemical Performance ◽  
Mesoporous Carbon ◽  
Nitrogen Adsorption ◽  
Ordered Mesoporous Carbon ◽  
Replication Process ◽  
Oxidative Treatment ◽  
Ordered Mesoporous ◽  
Aqueous Nitric Acid

In this study, ordered mesoporous carbon (OMC) was prepared via nano-casting method by using Santa Barbara Amorphous (SBA)-15 as a template and sucrose as a carbon precursor. The OMC was subsequently oxidized with aqueous nitric acid and referred as MOMC. The physicochemical properties of OMC and MOMC were determined using nitrogen adsorption–desorption analyser, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR). The results proved that the carbon replication process was successful. The electrochemical performance tests were carried out using cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) in 1 M KOH electrolyte for 1000 cycles. After oxidative treatment, the specific surface area and pore volume of OMC decreased but the specific capacitance of the electrode material has significantly increased from 117      F g–1 to 344 F g–1 at a scan rate of 10 mV s–1.   

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