Das, P K and Mishra, D and Anand, S and Das, R P (1999) Reduction of Mn(IV)oxide by (NH4)2 SO3 in the presence of metal ions in ammoniacal medium. Hydrometallurgy, 52. pp. 91-104.
![[thumbnail of DM6.pdf]](http://eprints.nmlindia.org/style/images/fileicons/application_pdf.png "DM6.pdf")
PDF
DM6.pdf
Restricted to NML users only. Others may use ->
Download (388kB) | Request a copy
Abstract
The reduction of manganese dioxide with ammonium sulphite in the presence of CuII., NiII.
and CoII. has been studied. It was observed that the catalytic activity is in the order CuII.)
CoII.)NiII.. The activation energies were estimated to be approximately 41, 70 and 74 kJ
moly1 in the presence of CuII., CoII. and NiII., respectively. The catalytic reduction follows
the shrinking core model. The interactive effects of metal ions were studied using 23 full factorial
design of experiments. The linear coefficients for the three metals were positive whereas
CuII.–CoII. showed a negative correlation and NiII. did not have any synergistic effect. q1999
Published by Elsevier Science B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Catalytic reduction; CuII.; NiII.; CoII.; MnO2; (NH4)2SO3 |
| Subjects: | Chemical Engineering |
| Divisions: | Metal Extraction and Forming |
| Depositing User: | Dr Devabrata Mishra |
| Date Deposited: | 19 Jan 2012 11:00 |
| Last Modified: | 03 Sep 2026 05:54 |
| URI: | http://eprints.nmlindia.org/id/eprint/4636 |
Actions (login required)
- View Item