TY  - JOUR
AU  - Dimitrijevic, S. P.
AU  - Anđić, Zoran
AU  - Kamberović, Željko
AU  - Dimitrijevic, S. B.
AU  - Vuković, N.
PY  - 2014
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/1641
AB  - The paper presents an improved process for recycling of silver-plate brass housing. Silver and copper are recovered with a purity of 99.99 % and 99.90 %, respectively, with the aim of obtaining materials of higher value using additional procedures based on the same process and equipment. The novel approach with subsequent electrorefining yields copper of 99.99 % purity with BS EN 1978:1998 (Cu-CATH-1) quality and is referred to as LME grade A. Additional processing of silver results in superfine, micro-sized Ag powder with partie size from 0.14 to 1.13 mu m and purity of 99.999 %. Copper electrorefining tests were performed using 1.50 dm(3) of synthetic electrolyte in a 2 dm(3) electrolytic cell. Effects of current density and electrolyte composition were investigated. Optimal current density for the first and second refining was 120 A/m(2) and 200 A/m(2), respectively. Additional refining of silver was performed by chemical reduction from an aqueous solution. Optimal results were obtained with ascorbic acid as a reduction agent in concentration of 0.1 mol/dm(3) and polyvinylpyrrolidon as a protective agent in concentration of 2 % by mass. The investigation results could be adopted into production.
PB  - Bulgarian Acad Science, Sofia
T2  - Bulgarian Chemical Communications
T1  - Recycling of silver-plated brass for production of high purity copper and ultrafine silver powder for electric contacts
VL  - 46
IS  - 4
SP  - 814
EP  - 824
UR  - https://hdl.handle.net/21.15107/rcub_cherry_1641
ER  - 

@article{
author = "Dimitrijevic, S. P. and Anđić, Zoran and Kamberović, Željko and Dimitrijevic, S. B. and Vuković, N.",
year = "2014",
abstract = "The paper presents an improved process for recycling of silver-plate brass housing. Silver and copper are recovered with a purity of 99.99 % and 99.90 %, respectively, with the aim of obtaining materials of higher value using additional procedures based on the same process and equipment. The novel approach with subsequent electrorefining yields copper of 99.99 % purity with BS EN 1978:1998 (Cu-CATH-1) quality and is referred to as LME grade A. Additional processing of silver results in superfine, micro-sized Ag powder with partie size from 0.14 to 1.13 mu m and purity of 99.999 %. Copper electrorefining tests were performed using 1.50 dm(3) of synthetic electrolyte in a 2 dm(3) electrolytic cell. Effects of current density and electrolyte composition were investigated. Optimal current density for the first and second refining was 120 A/m(2) and 200 A/m(2), respectively. Additional refining of silver was performed by chemical reduction from an aqueous solution. Optimal results were obtained with ascorbic acid as a reduction agent in concentration of 0.1 mol/dm(3) and polyvinylpyrrolidon as a protective agent in concentration of 2 % by mass. The investigation results could be adopted into production.",
publisher = "Bulgarian Acad Science, Sofia",
journal = "Bulgarian Chemical Communications",
title = "Recycling of silver-plated brass for production of high purity copper and ultrafine silver powder for electric contacts",
volume = "46",
number = "4",
pages = "814-824",
url = "https://hdl.handle.net/21.15107/rcub_cherry_1641"
}

Dimitrijevic, S. P., Anđić, Z., Kamberović, Ž., Dimitrijevic, S. B.,& Vuković, N.. (2014). Recycling of silver-plated brass for production of high purity copper and ultrafine silver powder for electric contacts. in Bulgarian Chemical Communications
Bulgarian Acad Science, Sofia., 46(4), 814-824.
https://hdl.handle.net/21.15107/rcub_cherry_1641

Dimitrijevic SP, Anđić Z, Kamberović Ž, Dimitrijevic SB, Vuković N. Recycling of silver-plated brass for production of high purity copper and ultrafine silver powder for electric contacts. in Bulgarian Chemical Communications. 2014;46(4):814-824.
https://hdl.handle.net/21.15107/rcub_cherry_1641 .

Dimitrijevic, S. P., Anđić, Zoran, Kamberović, Željko, Dimitrijevic, S. B., Vuković, N., "Recycling of silver-plated brass for production of high purity copper and ultrafine silver powder for electric contacts" in Bulgarian Chemical Communications, 46, no. 4 (2014):814-824,
https://hdl.handle.net/21.15107/rcub_cherry_1641 .