scholarly journals Kinetics of Manganese Oxides Dissolution in Sulphuric Acid Solutions Containing Oxalic Acid

Engineering ◽  
2013 ◽  
Vol 05 (09) ◽  
pp. 714-719 ◽  
Author(s):  
I. V. Artamonova ◽  
I. G. Gorichev ◽  
E. B. Godunov
Keyword(s):  
Oxalic Acid ◽  
Sulphuric Acid ◽  
Manganese Oxides ◽  
Acid Solutions ◽  
Kinetics Of

Decarbonylation Kinetics of Formic Acid in Aqueous Sulphuric Acid Solutions

1976 ◽  
Vol 318 (2) ◽  
pp. 202-206 ◽  
Author(s):  
G. Ciuhandu ◽  
A. Dumitreanu ◽  
Z. Simon
Keyword(s):  
Formic Acid ◽  
Sulphuric Acid ◽  
Acid Solutions ◽  
Kinetics Of

Leaching kinetics of iron from low grade kaolin by oxalic acid solutions

2011 ◽  
Vol 51 (4) ◽  
pp. 473-477 ◽  
Author(s):  
A. Martínez-Luévanos ◽  
M.G. Rodríguez-Delgado ◽  
A. Uribe-Salas ◽  
F.R. Carrillo-Pedroza ◽  
J.G. Osuna-Alarcón
Keyword(s):  
Oxalic Acid ◽  
Low Grade ◽  
Acid Solutions ◽  
Leaching Kinetics ◽  
Kinetics Of

Kinetic Study of Iron Dissolution from Low Grade Kaolin Using Oxalic Acid Solutions

2012 ◽  
Vol 1380 ◽  
Author(s):  
A. Martínez-Luévanos ◽  
L. E. Serrato-Villegas ◽  
M. G. Rodríguez-Delgado ◽  
F. R. Carrillo-Pedroza
Keyword(s):  
Oxalic Acid ◽  
Acid Concentration ◽  
Industrial Applications ◽  
Product Layer ◽  
Low Grade ◽  
Acid Solutions ◽  
Iron Dissolution ◽  
Bearing Materials ◽  
Kaolinitic Clay ◽  
Kinetics Of

ABSTRACTKaolin is an important material that is used in industrial applications, including ceramics, paper, paints, fiberglass, inks, pharmaceuticals, and cement. The presence of impurities, particularly iron and titanium bearing materials, imparts color to kaolin. During weathering or hydrothermal alteration, significant levels of iron oxides can be deposited that leave a concentrated kaolinitic clay unusable for industrial application. Therefore, several chemical methods have been applied to kaolin beneficiation in order to reduce these contaminants. Ferric oxide dissolution is of particular interest for producers of industrial minerals such as kaolin. The objective of this work was to examine the kinetics of iron dissolution form low grade kaolin using oxalic acid solutions. The effects of acid concentration and reaction temperature were studied. It was determined that the iron dissolution rate increases with oxalic acid concentration, temperature. Leaching data showed that iron dissolution from low grade kaolin is due to diffusion through the product layer. The activation energy of the process was 46.32 kJ/mol.

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