Enrichment on Bangka tin slag’s tantalum and niobium oxide contents through non-fluoride process
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چکیده
منابع مشابه
Preparation of benzoyl fluoride from benzotrifluoride catalyzed by niobium oxide
Several metals were found to catalyze the conversion of benzotrifluoride to benzoyl fluoride in the presence of carboxylic acids and sulfonic acids, together with the corresponding anhydride, and molecular oxygen. Nb2O5 exhibited the highest activity, and a conversion of 99.8% and a selectivity of 90% were obtained in 10 min under mild conditions. The composition of the acid and anhydride was f...
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ژورنال
عنوان ژورنال: Eastern-European Journal of Enterprise Technologies
سال: 2018
ISSN: 1729-4061,1729-3774
DOI: 10.15587/1729-4061.2018.129914