Abstract
The dissolution of kaolinite clay in hydrochloric acid solutions has been carried out in the presence of fluoride ions. Leaching in the presence of fluoride ions activates the clay for leaching, making higher extractions possible at lower roasting and leaching temperatures. The activation energy for the leaching of clay calcined at 540°C is decreased from 71 kJ/mol to 23 kJ/mol in the presence of fluoride ions. Dissolution in the presence of fluoride appears to fit a second-order reaction mechanism.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 143-158 |
| Number of pages | 16 |
| Journal | Hydrometallurgy |
| Volume | 15 |
| Issue number | 2 |
| DOIs | |
| State | Published - 1985 |
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ASJC Scopus subject areas
- Geochemistry and Petrology
- Geotechnical Engineering and Engineering Geology
Cite this
A kinetic model for the hydrochloric acid leaching of kaolinite clay in the presence of fluoride ions. / Gajam, Soliman Younes; Raghavan, Srini.
In: Hydrometallurgy, Vol. 15, No. 2, 1985, p. 143-158.Research output: Contribution to journal › Article
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TY - JOUR
T1 - A kinetic model for the hydrochloric acid leaching of kaolinite clay in the presence of fluoride ions
AU - Gajam, Soliman Younes
AU - Raghavan, Srini
PY - 1985
Y1 - 1985
N2 - The dissolution of kaolinite clay in hydrochloric acid solutions has been carried out in the presence of fluoride ions. Leaching in the presence of fluoride ions activates the clay for leaching, making higher extractions possible at lower roasting and leaching temperatures. The activation energy for the leaching of clay calcined at 540°C is decreased from 71 kJ/mol to 23 kJ/mol in the presence of fluoride ions. Dissolution in the presence of fluoride appears to fit a second-order reaction mechanism.
AB - The dissolution of kaolinite clay in hydrochloric acid solutions has been carried out in the presence of fluoride ions. Leaching in the presence of fluoride ions activates the clay for leaching, making higher extractions possible at lower roasting and leaching temperatures. The activation energy for the leaching of clay calcined at 540°C is decreased from 71 kJ/mol to 23 kJ/mol in the presence of fluoride ions. Dissolution in the presence of fluoride appears to fit a second-order reaction mechanism.
UR - http://www.scopus.com/inward/record.url?scp=0022251519&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0022251519&partnerID=8YFLogxK
U2 - 10.1016/0304-386X(85)90050-7
DO - 10.1016/0304-386X(85)90050-7
M3 - Article
AN - SCOPUS:0022251519
VL - 15
SP - 143
EP - 158
JO - Hydrometallurgy
JF - Hydrometallurgy
SN - 0304-386X
IS - 2
ER -