ChemInform Abstract: CHEMICAL ETHCHING OF INDIUM PHOSPHIDE BY HYDROGEN PEROXIDE-SULFURIC ACID-WATER SOLUTION

1980 ◽  
Vol 11 (17) ◽  
Author(s):  
Y. NISHITANI ◽  
T. KOTANI
Keyword(s):  
Hydrogen Peroxide ◽  
Sulfuric Acid ◽  
Indium Phosphide ◽  
Water Solution ◽  
Acid Water ◽  
Acid Water Solution

Low-temperature fast atom bombardment mass spectra of frozen nitric acid-water solution

1999 ◽  
Vol 34 (12) ◽  
pp. 1303-1311 ◽  
Author(s):  
Marina V. Kosevich ◽  
Oleg A. Boryak ◽  
Vlada A. Pashinskaya ◽  
Vadim S. Shelkovsky
Keyword(s):  
Nitric Acid ◽  
Low Temperature ◽  
Mass Spectra ◽  
Fast Atom Bombardment ◽  
Water Solution ◽  
Acid Water ◽  
Acid Water Solution

scholarly journals Effective Recovery Process of Copper from Waste Printed Circuit Boards Utilizing Recycling of Leachate

JOM ◽  
2020 ◽  
Author(s):  
Joona Rajahalme ◽  
Siiri Perämäki ◽  
Roshan Budhathoki ◽  
Ari Väisänen
Keyword(s):  
Hydrogen Peroxide ◽  
Sulfuric Acid ◽  
Printed Circuit Boards ◽  
Sulfuric Acid Concentration ◽  
Recovery Process ◽  
Copper Recovery ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Waste Printed Circuit Boards ◽  
Acid Consumption

AbstractThis study presents an optimized leaching and electrowinning process for the recovery of copper from waste printed circuit boards including studies of chemical consumption and recirculation of leachate. Optimization of leaching was performed using response surface methodology in diluted sulfuric acid and hydrogen peroxide media. Optimum leaching conditions for copper were found by using 3.6 mol L−1 sulfuric acid, 6 vol.% hydrogen peroxide, pulp density of 75 g L−1 with 186 min leaching time at 20°C resulting in complete leaching of copper followed by over 92% recovery and purity of 99.9% in the electrowinning. Study of chemical consumption showed total decomposition of hydrogen peroxide during leaching, while changes in sulfuric acid concentration were minor. During recirculation of the leachate with up to 5 cycles, copper recovery and product purity remained at high levels while acid consumption was reduced by 60%.

scholarly journals Effect of ions on sulfuric acid-water binary particle formation: 1. Theory for kinetic- and nucleation-type particle formation and atmospheric implications

2016 ◽  
Vol 121 (4) ◽  
pp. 1736-1751 ◽  
Author(s):  
Joonas Merikanto ◽  
Jonathan Duplissy ◽  
Anni Määttänen ◽  
Henning Henschel ◽  
Neil M. Donahue ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Particle Formation ◽  
Acid Water ◽  
Type Particle
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