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Titolo:
DISSOLUTION KINETICS OF COPPER(II) OXIDE IN AMMONIUM-CHLORIDE SOLUTIONS
Autore:
YARTASI A; COPUR M;
Indirizzi:
ATATURK UNIV,FAC ENGN,DEPT CHEM ENGN ERZURUM 25240 TURKEY
Titolo Testata:
Minerals engineering
fascicolo: 6, volume: 9, anno: 1996,
pagine: 693 - 698
SICI:
0892-6875(1996)9:6<693:DKOCOI>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Keywords:
OXIDE ORES; LEACHING; REACTION KINETICS; MODELING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
A. Yartasi e M. Copur, "DISSOLUTION KINETICS OF COPPER(II) OXIDE IN AMMONIUM-CHLORIDE SOLUTIONS", Minerals engineering, 9(6), 1996, pp. 693-698

Abstract

In the present work, the dissolution of copper (II) oxide in ammoniumchloride solutions was studied. In the experiments, the following variables were chosen: the solution concentration, reaction temperature, solid-to-liquid ratio, and stirring speed. It was observed that the decrease in the solid-to-liquid ratio, and the increase of the reaction temperature and solution concentration increased the dissolution rate. It was found that the stirring speed had no significant effect on thedissolution rate. The reaction kinetics of copper(II) oxide accordingto the heterogeneous and homogeneous reaction models were examined and it was found that the dissolution rate was controlled by diffusion from the product layer formed around the particle. The dissolution kinetics can be expressed: 1-3(1-x)(2/3) + 2(1-X) = [5.39 . 10(6)(C)(2.41)(S/L)(-1.14)e(-9785/T)]. t The calculated activation energy was 81.3 kj mol(-1).

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Documento generato il 25/10/20 alle ore 11:24:07