Results 31 to 40 of about 508 (188)

Diffusion coefficient of cupric ion in a copper electrorefining electrolyte containing nickel and arsenic

, 2021
Diffusion and convection are the main modes of mass transport that occur during copper electrorefining. Diffusion determines the rate of copper transfer across the diffusion layer, which in turn, affects the dissolution of the anode and deposition on the
Kalliomäki, Taina, Wilson, Benjamin P., Aromaa, Jari, Lundström, Mari   +3 more
core   +1 more source

Effect of Thiourea on Copper Electrorefining

Journal of MMIJ, 2009
The effect of thiourea on copper electrodeposition has been investigated by measuring the cathodic polarization curves for aqueous H2SO4-CuSO4 solutions and observing the surface morphology of deposited Cu. The cathode potential for Cu deposition was depolarized by the addition of thiourea less than 0.1 mmol/L, whereas it was significantly polarized ...
KUBOYAMA, Hiroshi, NAKANO, Hiroaki, OUE, Satoshi, FUKUSHIMA, Hisaaki, KOBAYASHI, Shigeo   +4 more
openaire   +2 more sources

The Effect of Arsenic on Copper Electrodeposition in Copper-Sulfate Solutions in Copper-Electrorefining [PDF]

Journal of the Korean institute of surface engineering, 2009
The effect of Arsenic in copper-sulfate solutions during electrorefining of copper was investigated using scanning electron microscopy, X-ray diffraction and cyclic voltammetry analysis. Electrodeposition was carried out using Arsenic, Antimony and bismuth addition to sulfate electrolytes: 45 g/l and 170 g/l .
Do-Hyung Kim, Yong-Hwan Kim, Won-Sub Chung   +2 more
openaire   +1 more source

Primary Copper Smelter and Refinery as a Recycling Plant—A System Integrated Approach to Estimate Secondary Raw Material Tolerance

Recycling, 2017
The primary production of sulfide concentrates includes smelting to copper matte or blister copper, conversion of matte to blister copper, and refining to copper.
Olof Forsén, Jari Aromaa, Mari Lundström   +2 more
doaj   +1 more source

Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery

Metals, 2021
In order to reflect possible issues in future sole e-waste processing, an electrolyte of complex chemical composition reflecting system of sole e-waste processing was obtained by following a specially designed pyro-electrometallurgical method.
Jovana Djokić, Dragana Radovanović, Zlatko Nikolovski, Zoran Andjić, Željko Kamberović   +4 more
doaj   +1 more source

Electrochemical behavior and in situ observation of galvanic couples of copper and silver or zinc wires in acidic copper sulfate solutions

Journal of MMIJ, 2023
The anodic dissolution reaction of copper in copper electro-refining was studied by considering the reaction of galvanic couples with different metals as impurities.
Yasushi TAKASAKI, Shoichi KAWAKAMI, Hinako KUBO, Hiroyuki KANEKO   +3 more
doaj   +1 more source

Removal of Sb Impurities in Copper Electrolyte and Evaluation of As and Fe Species in an Electrorefining Plant

Metals, 2021
Antimony and arsenic concentrations and their oxidation states (Sb(III), Sb(V), As(III) and As(V)) in copper electrorefining electrolyte can affect copper cathode quality through the formation of floating slimes.
Ana I. González de las Torres, Michael S. Moats, Guillermo Ríos, Ana Rodríguez Almansa, Daniel Sánchez-Rodas   +4 more
doaj   +1 more source

Study of a Novel Electrochemical Method for Copper Recovery from Waste Printed Circuit Boards

Chemical Engineering Transactions, 2017
This study was carried out to recover copper from printed circuit boards of waste computers through an electrochemical process. To simplify the overall recovery process, large pieces of printed circuit boards were used instead of pulverized samples.
C. Cocchiara, S. Piazza, C. Sunseri, R. Inguanta   +3 more
doaj   +1 more source

Biomass Electrorefining: Electrical‐to‐Chemical Energy Relay Systems for Hydrogen‐Chemical Coproduction via Multi‐Reaction Electrocatalytic Cascades

Carbon Neutralization, Volume 5, Issue 1, January 2026.
This graphical abstract illustrates an integrated electrocatalytic refining system designed for sustainable chemical and fuel production. At its core, the Biomass Oxidation Reaction (BOR) replaces conventional water oxidation at the anode. It is coupled with various cathodic reactions, such as the Hydrogen Evolution Reaction (HER), CO2 Reduction (CO2RR)
Xiaojing Jia, Ziyu Tang, Xueyan Zhu, Yue Niu, Fawei Lin, Guanyi Chen   +5 more
wiley   +1 more source

Passivation Behaviour of Anode in Copper Electrorefining Using Recycled Low-grade Copper Anode

Journal of MMIJ, 2017
Cu electrolysis was performed using low-grade copper anode with purity 78.7 mass% at a anode current density of 200 A・m-2 in an unagitated sulfate solution containing 0.596 mol・dm-3 of Ni2+ ions as impurity at 60 ℃, and the structure of anode slime ...
Koudai TOKUSHIGE, Kohei MORI, Satoshi OUE, Hiroshi MATSUSHIMA, Kazunari SUZUKI, Hiroaki NAKANO   +5 more
doaj   +1 more source