Preparation of Ammonium Metavandate from A Spent Vanadium Catalyst

•Vanadium compounds are widely used in the chemical industry, e.g. V2O5 as catalyst and NH4VO3 as corrosive inhibitor in absorption column of CO2.
•Up till now, the vanadium sources are titomagnetite ores and their concentrates. Researches are conducted to utilize vanadium catalysts that have been disposed in the industrial processes.
•Besides fulfilling the demand for vanadium, the usage of the spent catalysts help to prevent environmental pollution due to the poisonous and dangerous vanadium.
•The objective of this research is to recover vanadium compounds from spent catalyst in form NH4VO3. This recovery process consists of two stages, i.e. extraction and crystallization.
•The result shows that the presence of Fe compound has colored and decreased the purity of the crystal. Consequently, Fe compound should be separated by precipitation.
•NH4VO3 with 60 %-recovery with respect to the spent catalyst and 76%-purity could be obtained by extraction at room temperature using a solution of Na2CO3 1.887 M as a solvent. The time of extraction 60 minutes and the ratio of the V2O5 weight in the spent catalyst to the solvent volume was 6 gr/l.
•The process was then continued by the precipitation of Fe compound at pH 12 for two hours and the crystallization of NH4VO3 using NH4Cl 11.215 M for 4 – 5 hours at 60OC.

Dibuat oleh : Maya Ramadianti Musadi
Alamat e-mail :maya_rama@itenas.ac.id
Keterangan : Karya Ilmiah ini merupakan Poster yang dimuat pada WCCE9 APCChE 2013

Preparation of Ammonium Metavandate from A Spent Vanadium Catalyst