SELECTIVE LEACHING FOR THE RECOVERY OF COPPER FROM PCB Md Fazlul Bari*, Mst. Noorzahan Begum, Shamsul Baharin Jamaludin, Kamarudin Hussin School of Materials Engineering, University Malaysia Perlis, 02600 Arau,Malaysia Abstract This reported on the leaching behavior of printed circuit board (PCB) using a new leaching agent of ammonia
Leaching and selective recovery of Cu from printed circuit boards. Preprint (PDF Availe) · September 2019 PCB– secondary sourc e for copper productio n . 227. 228. 229. Fig. 9.
a high 98% of selective recovery of the leached Cu (as copper sulﬁde) at a copper / sulﬁde molar ratio of 1:3, initial pH 1.0–2.0, and with 100 ppm of ferric sulfate concentration. Copper
(iii) temperature, (iv) particle size, and (v) agitation were optimized for the maximum Cu leaching. Further in this study, selective copper sulfide recovery was also examined from the multimetallic PCB leachate. Important precipitation parameters such as (i) effect of initial lixiviant concentration and (ii)
Selective leaching process for the recovery of copper and zinc oxide from copper-containing dust Jun-Yi Wu Department of Mechanical Engineering and Green Energy Materials Center, Far East University, Tainan 744, Taiwan,Fang-Chih Chang The Experimental Forest, National Taiwan University, Nan-Tou 55750, Taiwan Correspondence [email protected]Cited by: 8
Jan 01, 2018· Experimental conditions, Temperature 60 oC, acid concentration 0.5 M. Temperature greatly affects the leaching kinetics of copper removal from PCBs .Cu(II) recovery was prominently influenced with temperature and leaching time, as presented in Fig.2. It was found that the Cu(II) removal increased with temperature 40 oC to 80 oC.
Selective leaching Glycine The presence of copper minerals with gold is known to lead to many challenges during the cyanidation of gold ores, such as high consumption of cyanide with low gold extraction and undesirable impacts on gold recovery during the downstream processes. An alternative selective leaching process for copper minerals from
Sep 29, 2015· Effect of various lixiviants on (a) the time required for metal recovery from the PCB pieces and (b) the surface appearance of the PCB pieces before and after leaching. Figure 3 Amounts of metals recovered from a 4 cm × 4 cm PCB piece (a) by HCl and HNO 3 and (b) by H 2 SO 4,C 2 H 4 O 2 and C 6 H 8 O 7,at 150 rpm and room temperature.
May 22, 2012· leaching, the recovery of copper from the drainage water of mines, as a method of the extraction of minerals, it was well established as early as the eighteenth century, but until about 25 years ago miners did not realize that bacteria taken an active part in the process. (A) as a method of the extraction of minerals, it was well established (B) as a method of the extraction of minerals well
Copper leaching was increased for sulfuric acid concentrations up to 1.2 mol/L and hydrogen peroxide concentrations of 10.0 vol% for a pulp density of 100 g/L at 50 degrees C over 4 h, whereas for
Feb 01, 2017· Le et al. (2011) conducted a study on recovery of copper from nitrate leach liquor of printed circuit boards by solvent extraction using 50% LIX984N at pH 1.9 and reported that the selective extraction of 99.7% copper from the leach solution is obtained in three stages with 50% LIX984N at O/A phase ratio. Cheromex CP-150 is consisted of 5
Selective leaching process for the recovery of copper and zinc oxide from copper-containing dust Jun-Yi Wu Department of Mechanical Engineering and Green Energy Materials Center, Far East University, Tainan 744, Taiwan,Fang-Chih Chang The Experimental Forest, National Taiwan University, Nan-Tou 55750, Taiwan Correspondence [email protected]
Feb 27, 2020· In this study, recovery of copper from solid material (obtained by leaching of chalcopyrite with oxalic acid in the presence of hydrogen peroxide) with a copper oxalate structure was carried out selectively using HCl. The chemical composition of the solid was as 29.3%, 9.7%, and 13.3% for Cu, Fe, and S, respectively. Selective recovery of copper by degrading the copper oxalate
The inﬂuence of ammonium salt on the copper recovery from printed circuit boards PCB was reported by Oishi et al. . They found that leaching was more selective for chloride than sulfate system and similar tendency was reported for puriﬁcation step realized by solvent extraction. Bari et al.  also investigated various ammonium salts for
process for copper recovery from electronic scraps employ-ing the Cu(I)-ammine complex is proposed on the basis of a thermodynamic consideration. As the ﬁrst step for its experimental veriﬁcation, the copper leaching behavior from a PCB in the Cu(II)-NH 3-(NH 4) 2SO 4 solutions was studied under a nitrogen atmosphere. 2. Copper Recovery Process
Present focuses on the selective recovery of copper from the enriched ground printed circuit boards (PCBs) using leaching and solvent extraction. The metal-enriched ground sample obtained from the beneficiation of the sized PCBs in a oratory scale column type air separator contained mainly 49.3% Cu, 3.83% Fe, 1.51% Ni, 5.45% Sn, 4.71% Pb, and 1.85% Zn.
allows selective leaching of the metals. The dependence of zinc, copper, iron, aluminum, nickel, gold, silver, lead, tin and palladium recovery on the leaching time for the PCBs waste is shown in Figs. 1-3. Leaching of PCBs waste with sulphuric acid and hydrogen peroxide gave 76 % Zn, 85 % Cu, 82 % Fe,
Dec 30, 2011· Highlights Selective leaching of Au from scrap mobile phone PCBs by two stage electro-generated chlorine and recovery by ion exchange. Copper leaching (97%) by 1st stage electro-generated leaching (ORP value <350 mV Ag/AgCl) with a minor gold (5%). Gold leaching (93%, ∼67 mg/L) by 2nd leaching (ORP value >1100 mV Ag/AgCl) in 0.1 mol/L HCl at 25 °C. A concentrated
Sep 29, 2015· Effect of various lixiviants on (a) the time required for metal recovery from the PCB pieces and (b) the surface appearance of the PCB pieces before and after leaching
Feb 02, 2013· Man-Seung Lee, Jong-Gwan Ahn, Jae-Woo Ahn.,2003, Recovery of copper, tin and lead from the spent nitric etching solutions of printed circuit board and regeneration of the etching solution, Hydrometallurgy 70 (2003) 23–29.  Brown, C.J., Davy, D., Simmons, P.J., 1980. Recovery of nitric acid from solutions used for treating metal surface.
A blend of brass ashes containing 48.0% of zinc and 16.6% of copper was processed through selective leaching with dilute H2SO4 and solvent extraction, using D2EHPA as the extracting agent in order
Dec 01, 2015· Printed circuit board recycling: Physical processing and copper extraction by selective leaching Author links open overlay panel Flávia P.C. Silvas a Mónica M. Jiménez Correa a Marcos P.K. Caldas a b Viviane T. de Moraes a Denise C.R. Espinosa a Jorge A.S. Tenório a
Nov 26, 2014· The concerns a hydrometallurgical method for selective recovery of copper from low-grade electric and electronic wastes. The following consecutive stages were proposed: smelting of the scraps to produce Cu–Zn–Ag alloy, leaching of the alloy in ammoniacal solution, and selective copper electrowinning. Cu–Zn–Ag alloy was a polymetallic and five-phase system.
Zong Gao, Jianchi Li, C. Zhang, Printed circuit board Recycling:A State of Art survey, Dept of Industrial Engineering, Texas USA. IEEE (2002) 7. Md Fazlul Bari, Mst. Noorzahan Begum, Shamsul Baharin Jamaludin, Kamarudin, Selective leaching for the recovery of copper from pcb, Hussin School of
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