title: Recovery of vanadium from spent catalysts of sulfuric acid plant by using inorganic and organic acids: Laboratory and semi-pilot tests.
abstract: Catalysts are used extensively in industry to purify and upgrade various feeds and to improve process efficiency. These catalysts lose their activity with time. Spent catalysts from a sulfuric acid plant (main elemental composition: 5.71% V2O5, 1.89% Al2O3, 1.17% Fe2O3 and 61.04% SiO2; and the rest constituting several other oxides in traces/minute quantities) were used as a secondary source for vanadium recovery. Experimental studies were conducted by using three different leaching systems (citric acid with hydrogen peroxide, oxalic acid with hydrogen peroxide and sulfuric acid with hydrogen peroxide). The effects of leaching time, temperature, concentration of reagents and solid/liquid (S/L) ratio were investigated. Under optimum conditions (1:25 S/L ratio, 0.1 M citric acid, 0.1 M hydrogen peroxide, 50°C and 120 min), 95% V was recovered in the presence of hydrogen peroxide in citric acid leaching.
authors.affiliation: Mineral-Metal Recovery and Recycling (MMR&R) Research Group, Mineral Processing Division, Department of Mining Engineering, Suleyman Demirel University, TR32260 Isparta, Turkey.
authors.forename: Ceren
authors.initials: C
authors.lastname: Erust
authors.affiliation: Mineral-Metal Recovery and Recycling (MMR&R) Research Group, Mineral Processing Division, Department of Mining Engineering, Suleyman Demirel University, TR32260 Isparta, Turkey. Electronic address: ataakcil@sdu.edu.tr.
authors.forename: Ata
authors.initials: A
authors.lastname: Akcil
authors.affiliation: Mineral-Metal Recovery and Recycling (MMR&R) Research Group, Mineral Processing Division, Department of Mining Engineering, Suleyman Demirel University, TR32260 Isparta, Turkey; National Center on Complex Processing of Mineral Raw Material of the Republic of Kazakhstan, Almaty, Kazakhstan; Kazakh National Technical University named after K.I. Satpaev, 22 Satpaev Str., 050013 Almaty, Kazakhstan.
authors.forename: Zyuldyz
authors.initials: Z
authors.lastname: Bedelova
authors.affiliation: Mineral-Metal Recovery and Recycling (MMR&R) Research Group, Mineral Processing Division, Department of Mining Engineering, Suleyman Demirel University, TR32260 Isparta, Turkey; National Center on Complex Processing of Mineral Raw Material of the Republic of Kazakhstan, Almaty, Kazakhstan; Kazakh National Technical University named after K.I. Satpaev, 22 Satpaev Str., 050013 Almaty, Kazakhstan.
authors.forename: Kuanysh
authors.initials: K
authors.lastname: Anarbekov
authors.affiliation: Kazakh National Technical University named after K.I. Satpaev, 22 Satpaev Str., 050013 Almaty, Kazakhstan.
authors.forename: Aliya
authors.initials: A
authors.lastname: Baikonurova
authors.affiliation: Mineral-Metal Recovery and Recycling (MMR&R) Research Group, Mineral Processing Division, Department of Mining Engineering, Suleyman Demirel University, TR32260 Isparta, Turkey.
authors.forename: Aysenur
authors.initials: A
authors.lastname: Tuncuk
mesh_terms: D019343:Citric Acid / Q000737:chemistry*; D007220:Industrial Waste / Q000032:analysis; D019815:Oxalic Acid / Q000737:chemistry*; D059027:Recycling / Q000379:methods*; D013464:Sulfuric Acids / Q000737:chemistry*; D014639:Vanadium / Q000032:analysis*; D018505:Waste Management / Q000295:instrumentation / Q000379:methods*
chemical_list: D007220:Industrial Waste; D013464:Sulfuric Acids; D014639:Vanadium; D019343:Citric Acid; D019815:Oxalic Acid; C033158:sulfuric acid
keywords: Leaching; Metal recovery; Spent catalyst; Vanadium; Waste management