What is the role of sulfuric acid in the leaching process after fluorination of coltan ore?

Label:chem

Topic
After fluorination, the ore is subjected to sulfuric acid leaching to dissolve the fluorinated Ta and Nb compounds, converting them into a solution that can be further processed for metal recovery.
Answer
Sulfuric acid is used to leach the fluorinated products of Ta and Nb from the coltan ore. The leaching process at room temperature with 2N sulfuric acid solution effectively dissolves the fluorinated Ta and Nb compounds, achieving high recovery rates of about 94% Ta and 95% Nb. The resulting pregnant leach solution (PLS) contains significant concentrations of Ta and Nb, which can be further purified and separated.
Return to Home Chemical List
Knowledge you may be interested in
How does the particle size of coltan ore affect the recovery of tantalum (Ta) and niobium (Nb) during the fluorination process? What is the role of ammonium bifluoride (ABF) in the extraction of tantalum (Ta) and niobium (Nb) from coltan-bearing ore? What are the new compounds isolated from the roots of Stemona tuberosa, and what are their structures? What is the effect of zeolite topology on the hydrocracking pathways of 9,10-dihydrophenanthrene (9,10-DHP)? What are the structure-activity relationships (SAR) of the 9,10-dihydrophenanthrene derivatives? How were the 9,10-dihydrophenanthrene derivatives synthesized and tested for their inhibitory activity? What are the 9,10-dihydrophenanthrene derivatives, and what is their role in treating COVID-19? What is the larvicidal effect of sodium hypochlorite on juvenile Aedes aegypti mosquitoes? How effective is copper sulfate pentahydrate as a larvicide against juvenile Aedes aegypti mosquitoes? What is the efficacy of silver nitrate as a larvicide against juvenile Aedes aegypti mosquitoes? What is the role of sulfuric acid and ferric sulfate in the leaching process of silver and copper from photovoltaic waste? How does the concentration of sulfuric acid and ferric sulfate affect the leaching efficiency of silver and copper? What are the environmental advantages of using sulfuric acid and ferric sulfate over nitric acid in the leaching process? What is the role of pyronaridine tetraphosphate in treating infections caused by highly pathogenic coronaviruses such as SARS-CoV-2, SARS-CoV-1, and MERS-CoV? How does pyronaridine tetraphosphate compare to other antiviral treatments like molnupiravir and nirmatrelvir in terms of efficacy against SARS-CoV-2? What is the mechanism of action of pyronaridine tetraphosphate against SARS-CoV-2 and other coronaviruses? What is the role of the dimeric salen ligand derived from L-tartaric acid in the asymmetric addition of trimethylsilyl cyanide to aldehydes? How does the Ti-salen complex derived from the dimeric salen ligand perform in the asymmetric addition of trimethylsilyl cyanide to various aldehydes? What is the role of the SARS-CoV-2 main protease (Mpro) in viral replication, and why is it considered a valid drug target? What improvements were made to the SARS-CoV-2 Mpro high-throughput screening (HTS) assay?