Solvent Extraction of Niobium and Tantalum. V. Separation of Niobium and Tantalum with TOA and Some N-Substituted Long Chain Amines
Copyright policy ) Djordjević, C.; Sevdić, D .;
Solvent Extraction of Niobium and Tantalum. V. Separation of Niobium and Tantalum with TOA and Some N-Substituted Long Chain Amines
Separation of niobium and tantalum by solvent extraction with di-n-octylami no eth anol (DOAE), di-n-octylamino propanol (DOAP), di-n-octylamino butanone (DOAB), di-n-octylamino acetic acid (DOAA), di-n-octylamine (DOA) and tri-n-octylamine (TOA) in chloroform is described, in the metal concentration ra n ge of 10-5 M. Separation can be a chieved in 0.2 M HF metal solutions in the sulphuric acid concentration range of 1-5 M. Tantalum is extracted into the organic phase and can be stri pped back easily with 1-6 M hydrochloric acid. Niobium and tantalum of radiochemical purity are obtained. The separation factors displayed by these extraction reagents are compare d and discussed.
- University of Zagreb Croatia
- Ruđer Bošković Institute Croatia
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