The criteria of critical runaway and stable temperatures of catalytic decomposition of hydrogen peroxide in the presence of hydrochloric acid

2006 ◽  
Vol 135 (1-3) ◽  
pp. 319-327 ◽  
Author(s):  
K LU ◽  
C YANG ◽  
P LIN
Keyword(s):  
Hydrogen Peroxide ◽  
Hydrochloric Acid ◽  
Catalytic Decomposition

scholarly journals Dissolution of copper from smelting slag by leaching in chloride media

2017 ◽  
Vol 53 (3) ◽  
pp. 407-412
Author(s):  
M. Dimitrijevic ◽  
D. Urosevic ◽  
S. Milic ◽  
M. Sokic ◽  
R. Markovic
Keyword(s):  
Hydrogen Peroxide ◽  
Hydrochloric Acid ◽  
Aqueous Solutions ◽  
Room Temperature ◽  
Catalytic Decomposition ◽  
Copper Smelting ◽  
Copper Extraction ◽  
Complete Dissolution ◽  
Iron Extraction ◽  
Smelting Slag

Leaching of copper smelting slag in chloride media was studied. The lixiviants used were aqueous solutions of hydrochloric acid (0.5-2.0 M HCl) as well as hydrogen peroxide and hydrochloric acid (0.5-3.0 M H2O2, 1.0 M HCl). The maximum final copper extraction from the slag of 73% was attained with 3 M H2O2, at room temperature after 120 minutes of reaction. At the same time, 55% of the iron from the slag was also dissolved. The copper extraction increased during the first 60 minutes of reaction and essentially ceased thereafter. Because of a rapid catalytic decomposition of hydrogen peroxide, it should be added contiuously to the leach suspension rather than at once at the begining of the experiment. In fact, it appears that almost complete dissolution of copper from the slag is achievable after about 4 hours of leaching by implementing the method of continuous lixiviant addition. Also, it seems that the final iron extraction could be limitied to as low as 20% by using this method.

Dual- vs single-active site mechanism in the catalytic decomposition of hydrogen peroxide

1978 ◽  
Vol 40 (6) ◽  
pp. 1277-1278 ◽  
Author(s):  
Mario Barteri ◽  
Marcello Farinella ◽  
Basilio Pispisa
Keyword(s):  
Hydrogen Peroxide ◽  
Active Site ◽  
Catalytic Decomposition
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