Results 151 to 160 of about 1,062 (192)

Molybdenum Electrorefining in Ionic Liquids

ECS Meeting Abstracts, 2019
Molybdenum is a valuable refractory metal used to harden and protect metal alloys. Additionally, certain nuclear reactors can be used to produce Mo99, a valuable radioactive isotope with important medical applications. To qualify for medical use, the isotope must be isolated in high purity molybdenum.
Ethan Mitchel Gunnell, Ashley Avery, Andrew Ying, LaGrande Gunnell, Michael Stoddard, Matthew Memmott, John N. Harb   +6 more
openaire   +1 more source

Selective electrorefining with liquid membranes

AIChE Journal, 1983
AbstractLiquid membranes containing macrocyclic polyethers can be used to electrorefine metals. This purification depends on the selective reaction of the polyether and the metal cation to produce a charged product. The amount of this product is found to be proportional to the square root of the amount of polyester present.
Mehmet Gökalp, K. T. Hodgson, E. L. Cussler   +2 more
openaire   +1 more source

Additive Behavior in Copper Electrorefining

JOM, 1987
This paper reports on the mode of action of two different organic additives—gelatine and thiourea—during the electrorefining of copper from acid copper sulfate solutions. Gelatine increases the cathode current efficiency and produces smoother deposits up to a certain level of concentration, beyond which, however, these effects are diminished by the ...
S. E. Afifi, A. A. Elsayed, A. E. Elsherief   +2 more
openaire   +1 more source

Silicon recovery from silicon–iron alloys by electrorefining in molten fluorides [PDF]

Electrochimica Acta, 2013
Electrorefining of a silicon-iron material (Si-4.7at%Fe) in molten NaF-KF at 850°C has been investigated in view of recovering pure Si, using electrochemical techniques, SEM-EDS and ICP-AES analyses.
L Massot, Laurent Cassayre, P Taxil
exaly   +2 more sources

Process Optimization in Copper Electrorefining

Advanced Engineering Materials, 2004
Copper is one of the major metallic materials together with steel and aluminum. At present, approx. 11 Mt of copper are produced all over the world by electrorefining in sulfuric acid electrolytes. In the last years the current density could be increased to 320–340 A/m2 by simultaneous improvement of the cathode quality, although the parameters ...
M. Stelter, H. Bombach
openaire   +1 more source

Direct electrorefining of nickel matte

JOM, 1958
International Nickel Company has unveiled a new electrorefining process which recovers high purity sulfur, selenium, and cobalt.
L. S. Renzoni, R. C. McQuire, W. V. Barker   +2 more
openaire   +1 more source

Developments in Alkaline Tin Electrorefining

JOM, 1988
Although alkaline stannate baths for electrorefining of tin have been used for some time, there is still room for improvement The effects of alkali concentration, current density and temperature on the cathodic current efficiency have been studied, and a bath temperature of 75°C is recommended.
A. E. Saba, S. E. Afifi, A. E. El Sherief   +2 more
openaire   +1 more source

Studies on electrorefining of calciothermic hafnium

Journal of Nuclear Materials, 1978
Abstract The paper deals with a fused salt electrorefming process to produce pure hafnium metal starting from its calciothermically reduced intermediate. The electrolyte, NaCl-NaF-HfCl 4 , has been developed for its suitability for running hafnium electrorefining.
I.G. Sharma, C.K. Gupta
openaire   +1 more source

Precision of Electrorefined Copper Assaying

1984
A principal measure of the quality of electrorefined copper cathodes is impurity content. As such, good analytical precision is needed to identify subtle improvements in quality and to ensure that industry specifications are being satisfied. The object of this study was to determine and document the current state of refined copper analytical precision.
JC Parr, JW Braithwaite
openaire   +1 more source

Sampling of Electrorefined Copper Cathodes

Journal of Testing and Evaluation, 1980
Abstract Problems involved in the sampling of electrorefined cathode production in a typical refinery are examined. Items discussed include: nonhomogeneity in single cathodes, nonhomogeneity among cathodes from the same electrolytic cell, nonhomogeneity among cathodes from single production lots, and limitations of visual examination in ...
WM Tuddenham, AD Dangerfield, BB McMillan   +2 more
openaire   +1 more source