Challenges with elemental sulfur removal during the leaching of copper and zinc sulfides, and from the residues; a review

Jorjani, E.; Ghahreman, Ahmad

doi:10.1016/j.hydromet.2017.06.011

Cited by 76 publications

(48 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The pH of the suspension was adjusted to 8 by the ammonia solution. Afterward, the mixture was stirred vigorously under N 2 at 60 °C for 24 h. The resulting solid was filtered, successively washed with water, CCl 4 (Kelong, China), and anhydrous ethanol (Kelong, China), and then dried under vacuum at 60 °C for 4 h. Herein, CCl 4 is used as a solvent to remove a small amount of elemental sulfur, 76 which floats on the surface of the suspension and might be produced from the excessive hydrolysis of thiometallate. 77 It is noted that the ion-exchange conditions are chosen based on a series of experiments which were performed to optimize the exchange pH, time, and temperature.…”

Section: Methodsmentioning

confidence: 99%

Synthesis, Characterization, and Hydrotreating Activity of NiW Presulfurized Catalysts Prepared via a Tetrathiotungstate-Intercalated NiAl LDH

Wang

Yang

et al. 2020

ACS Omega

View full text Add to dashboard Cite

A tetrathiotungstate-intercalated NiAl layered double hydroxide (LDH) was synthesized and then calcined under N 2 at various temperatures to prepare a series of NiW presulfurized hydrotreating catalysts. Upon calcination, WS 4 2– in the interlayer decomposes into WS 3 and then WS 2 , releasing sulfur to sulfurize nickel in the sheets. The property and activities of catalysts for hydrodesulfurization (HDS) of dibenzothiophene and hydrodearomatization (HDA) of tetralin are dependent on the calcination temperature. At 300 °C, WS 3 can be well maintained, offering highly active hydrogenation sites S 2 2– and superior HDA activity. As the temperature increases up to 500 °C, WS 3 converts into WS 2 , while nickel sulfides migrate to the edge of WS 2 to form NiWS phases with high HDS activity. LDH-based presulfurized catalysts can achieve fully sulfurized and well-dispersed tungsten species even at high tungsten loadings and can retain more WS 3 even at high temperatures because of the peculiar properties of LDHs. Therefore, they show better HDS and superior HDA activities over an oxidic NiW LDH-based catalyst (LDO) and an alumina-supported NiWS presulfurized catalyst (NiWS/Al 2 O 3 ). The optimized catalyst shows 1.59 and 1.05 times higher HDS activity than LDO and NiWS/Al 2 O 3 while 2.05 and 1.77 times higher HDA activity than LDO and NiWS/Al 2 O 3 , respectively. It also shows better HDS and HDA activity for a real diesel than a NiCoMoW/Al 2 O 3 commercial catalyst.

show abstract

Section: Methodsmentioning

confidence: 99%

Synthesis, Characterization, and Hydrotreating Activity of NiW Presulfurized Catalysts Prepared via a Tetrathiotungstate-Intercalated NiAl LDH

Wang

Yang

et al. 2020

ACS Omega

View full text Add to dashboard Cite

show abstract

“…Jorjani and Ghahreman 6 reported that if mercury is present in the ores the elemental sulfur will contain the mercury and this can be leached by sodium sulfide to free it from mercury by forming insoluble mercury sulfide while elemental sulfur forms soluble polysulfide: Na2S + (x−1)S° → Na2Sx Hg 2+ + S 2-→ HgS…”

Section: Sulfides Containing Mercurymentioning

confidence: 99%

Elemental Sulfur Production in Hydrometallurgy

Habashi¹

2017

ECB

View full text Add to dashboard Cite

show abstract

“…The hydrometallurgical route has the advantages of being able to process low-grade ores, to allow better control of co-products, and to have a lower environmental impact [5]. Nevertheless, chalcopyrite is refractory in sulfuric media with slow dissolution rates [6,7].…”

Section: Introductionmentioning

confidence: 99%

Hydrometallurgical Recovery of Cu and Zn from a Complex Sulfide Mineral by Fe3+/H2SO4 Leaching in the Presence of Carbon-Based Materials

Álvarez

Fidalgo

Gascó

et al. 2021

Metals

View full text Add to dashboard Cite

Chalcopyrite, the main ore of copper, is refractory in sulfuric media with slow dissolution. The most commonly employed hydrometallurgical process for the oxidation of chalcopyrite and copper extraction is the sulfuric acid ferric sulfate system The main objective of the present work is to study the use of cheap carbon-based materials in the leaching of copper and zinc from a sulfide complex mineral from Iberian Pyrite Belt (IPB). The addition effect of commercial charcoal (VC) and two magnetic biochars (BM and HM) that were obtained by pyrolysis of biomass wastes was compared to that of commercial activated carbon (AC). The experimental results performed in this work have shown that the presence of carbon-based materials significantly influences the kinetics of chalcopyrite leaching in the sulfuric acid ferric sulfate media at 90 °C. The amount of copper and zinc extracted from IPB without the addition of carbon-based material was 63 and 72%, respectively. The highest amount of extracted zinc (>90%) was obtained with the addition of VC and AC in IPB/carbon-based material ratio of 1/0.25 w/w. Moreover, it is possible to recover more than 80% of copper with the addition of VC in a ratio 1/0.25 w/w. Moreover, an optimization of the properties of the carbon-based material for its potential application as catalyst in the leaching of metals from sulfide is necessary.

show abstract

Challenges with elemental sulfur removal during the leaching of copper and zinc sulfides, and from the residues; a review

Cited by 76 publications

References 42 publications

Synthesis, Characterization, and Hydrotreating Activity of NiW Presulfurized Catalysts Prepared via a Tetrathiotungstate-Intercalated NiAl LDH

Synthesis, Characterization, and Hydrotreating Activity of NiW Presulfurized Catalysts Prepared via a Tetrathiotungstate-Intercalated NiAl LDH

Elemental Sulfur Production in Hydrometallurgy

Hydrometallurgical Recovery of Cu and Zn from a Complex Sulfide Mineral by Fe3+/H2SO4 Leaching in the Presence of Carbon-Based Materials

Contact Info

Product

Resources

About