Investigation of selective leaching and kinetics of copper from malachite ore in aqueous perchloric acid solutions

2018 ◽  
Vol 54 (5) ◽  
pp. 815-827 ◽  
Author(s):  
Mehmet Kayra Tanaydın ◽  
Nizamettin Demirkıran
Keyword(s):  
Perchloric Acid ◽  
Acid Solutions ◽  
Selective Leaching ◽  
Aqueous Perchloric Acid ◽  
Kinetics Of

The Oxidation of Tetrahydrofuran by Ruthenium Tetroxide

1972 ◽  
Vol 50 (19) ◽  
pp. 3129-3134 ◽  
Author(s):  
Donald G. Lee ◽  
Matthijs Van Den Engh
Keyword(s):  
Perchloric Acid ◽  
Activation Parameters ◽  
Isotopic Labeling ◽  
Acid Solutions ◽  
Ruthenium Tetroxide ◽  
Rate Determining Step ◽  
Rate Of Reaction ◽  
Hydride Abstraction ◽  
Aqueous Perchloric Acid ◽  
Kinetics Of

The kinetics of the oxidation of tetrahydrofuran by ruthenium tetroxide in aqueous perchloric acid solutions have been investigated. The rate of reaction is found to be directly dependent on the concentrations of oxidant and reductant, but inversely dependent on the acidity of the medium. A mechanism involving hydride abstraction in the rate determining step was found to be consistent with the evidence obtained from isotopic labeling and an analysis of the activation parameters (ΔH≠ = 14.0 kcal/mol, ΔS≠ = −18.4 e.u.) of the reaction. This conclusion is further substantiated by noting the similarity between the reactions of ruthenium tetroxide with alcohols and ethers.

The Oxidation of 2-Propanol by Ruthenium Tetroxide

1972 ◽  
Vol 50 (13) ◽  
pp. 2000-2009 ◽  
Author(s):  
Donald G. Lee ◽  
Matthijs van den Engh
Keyword(s):  
Perchloric Acid ◽  
Acid Solutions ◽  
Ruthenium Tetroxide ◽  
High Acid ◽  
Rate Determining Step ◽  
Carbonium Ion ◽  
Hydride Abstraction ◽  
Aqueous Perchloric Acid ◽  
Kinetics Of ◽  
Very High

The kinetics of the oxidation of 2-propanol by ruthenium tetroxide in aqueous perchloric acid solutions have been investigated. The results indicate that the two mechanisms pertain; at moderate acidities (1–6.5 M HClO4) the rate determining step involves hydride abstraction while at very high acid concentrations the rate determining step becomes carbonium ion formation.

Kinetics of the manganese(III)-sulfur(IV) reaction in aqueous perchloric acid solutions

1984 ◽  
Vol 23 (8) ◽  
pp. 1134-1137 ◽  
Author(s):  
P. A. Siskos ◽  
N. C. Peterson ◽  
R. E. Huie
Keyword(s):  
Perchloric Acid ◽  
Acid Solutions ◽  
Aqueous Perchloric Acid ◽  
Kinetics Of
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