Recovery of cobalt and molybdenum from consumed catalyst using hydrochloric acid

Sutama, D. K. and Prasetya, A. and Petrus, H. T. B. M. and Astuti, W. (2021) Recovery of cobalt and molybdenum from consumed catalyst using hydrochloric acid. In: International Seminar on Mineral and Coal Technology.

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Abstract

Cobalt and molybdenum are valuable metals whose presence in nature is very limited. The consumed catalyst, which is abundantly available in the petroleum refinery industry, is a potential source of those metals. A hydrometallurgical process using acid as a leaching agent is usually used to extract and separate the metals more effectively. This method is considered capable of yielding recovery of a higher percentage of metal. In this study, hydrochloric acid solutions at various concentrations of 1.0, 1.5 and 2 M were used. The consumed catalyst was obtained from Pertamina Refinery Unit IV, Cilacap, Indonesia. Leaching experiment was carried out for 300 minutes and sampling was undertaken at 1, 3, 5, 15, 30, 90 and 300 minutes. The particle size and agitation speed were fixed at 200 mesh and 400 rpm. Samples of consumed catalyst were analyzed using EDXRF before the leaching process. Samples of solution were analyzed using ICP-EOS. Experimental results have shown that the recovery of cobalt and molybdenum increases with the increase of either concentration of hydrochloric acid or temperature. The highest recoveries in cobalt and molybdenum were 34.66 and 5.03, respectively, obtained at a concentration of hydrochloric acid of 2 M and temperature 60 C.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Library Dosen
Subjects: T Technology > TP Chemical technology
T Technology > TP Chemical technology > Chemical engineering
Divisions: Faculty of Engineering > Chemistry Engineering Department
Depositing User: Sri JUNANDI
Date Deposited: 26 Sep 2024 00:57
Last Modified: 26 Sep 2024 00:57
URI: https://ir.lib.ugm.ac.id/id/eprint/5004

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