Đăng nhập
 
Tìm kiếm nâng cao
 
Tên bài báo
Tác giả
Năm xuất bản
Tóm tắt
Lĩnh vực
Phân loại
Số tạp chí
 

Bản tin định kỳ
Báo cáo thường niên
Tạp chí khoa học ĐHCT
Tạp chí tiếng anh ĐHCT
Tạp chí trong nước
Tạp chí quốc tế
Kỷ yếu HN trong nước
Kỷ yếu HN quốc tế
Book chapter
Tạp chí quốc tế 2018
Số tạp chí 39(2018) Trang: 1-6
Tạp chí: Mineral Processing and Extractive Metallurgy Review

Niobium and tantalum are found together in natural minerals. Leaching with concentrated acid solution or alkaline roasting followed by water/dilute acid leaching results in a solution containing these two metals. In this work, we reviewed the extraction and separation of Nb(V) and Ta(V) from leach liquors in the absence and presence of hydrofluoric acid by acidic, neutral extractants and amines. Several solvent extraction systems were compared in the light of the requirement of hazardous chemicals, extraction/separation efficiency, and stability/solubility of extractants. Since the cationic species of Nb(V) and Ta(V) are unstable in the aqueous solution, the application of acidic extractants for extraction and separation of these metals is limited. Amines can extract Nb(V) as well as Ta(V) irrespective of the presence of fluoride ion but the separation of these metals from the loaded amines should be carried out in stripping process, resulting in process complexity. Another disadvantage encountered for amine is related to high viscosity in extraction process. Neutral extractants are considered as promising extractants which are effective to separate Ta(V) and Nb(V) from either non-fluoride or to moderate fluoride ion concentration in terms of extraction, separation and stripping efficiency. Compared to the traditional methyl iso-butyl ketone (MIBK) based system, methyl isoamyl ketone (MIAK) is found to be a promising extractant to separate Nb(V) and Ta(V).

Các bài báo khác
Số tạp chí 27(2018) Trang: 78-85
Tạp chí: Journal of the Korean Institute of Resources Recycling
Số tạp chí 39(2018) Trang: 1-17
Tạp chí: Mineral Processing and Extractive Metallurgy Review
Số tạp chí 7(2018) Trang: 26-31
Tạp chí: International Journal of Engineering and Technology (UAE)
Số tạp chí 7(2018) Trang: 140-144
Tạp chí: International Journal of Engineering and Technology (UAE)
Số tạp chí 2(2018) Trang: 150-157
Tác giả: Võ Văn Tài
Tạp chí: STATISTICAL THEORY AND RELATED FIELDS
Số tạp chí 11(60)(2018) Trang: 147-158
Tạp chí: Bulletin of the Transilvania university of Brasov. Series II - Forestry. Wood industry. Agricultural food engineering
Số tạp chí 24(2)(2018) Trang: 93-100
Tạp chí: Chemical Industry & Chemical Engineering Quarterly
Số tạp chí 24(2)(2018) Trang: 229-235
Tạp chí: Bulgarian Journal of Agricultural Science
Số tạp chí 18(2018) Trang: 56
Tạp chí: BMC Complementary and Alternative Medicine
Số tạp chí Vol.8 No. 4-2(2018) Trang: 1501-1506
Tạp chí: International Journal on Advanced Science, Engineering and Information Technology
Số tạp chí DEPISA Monograpth 5(2018) Trang: 41-57
Tạp chí: Supporting Professional Learning in Sourheast Asian Universiy through DEPISA
Số tạp chí 2018(2018) Trang: 1-18
Tạp chí: Process Integration and Optimization for Sustainability


Vietnamese | English






 
 
Vui lòng chờ...