caa a22 4500 469110325 CHVBK 20180323133108.0 cr unu---uuuuu 170328e19921101xx s 000 0 eng 10.1007/BF02037479 doi (NATIONALLICENCE)springer-10.1007/BF02037479 Separation of actinides with alkylpyridinium salts [Elektronische Daten] [J. Strnad, K. Heckmann] Various f-elements are separated as anionic complexes from both acidic and alkaline solutions by precipitation with alkylpyridinium salts. The precipitates are also cationic surfactants where the simple counter-ion (e.g. nitrate or chloride) is replaced by the negatively charged complex anion of an actinide or lanthanide. The low solubility of these precipitates is explained by a strong affinity of divalent complex counter-ions of f-elements to the quaternary nitrogen. Precipitations in solutions of nitric acid allow to separate tetravalent f-elements from other metals, in alkaline carbonate solutions tetravalent and hexavalent actinides are precipitated simultaneously. The last procedure yields precipitates, which are very intimate mixtures of hexavalent and tetravalent actinides. This allows to prepare mixed oxides in a simple way. Akadémiai Kiadó, 1992 Strnad J. Institute of Physical and Macromolecular Chemistry, University of Regensburg, Universitätsstrasse 31, D-8400, Regensburg, (Germany) aut Heckmann K. Institute of Physical and Macromolecular Chemistry, University of Regensburg, Universitätsstrasse 31, D-8400, Regensburg, (Germany) aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 163/1(1992-11-01), 47-57 0236-5731 163:1<47 1992 163 10967 https://doi.org/10.1007/BF02037479 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02037479 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Strnad J. Institute of Physical and Macromolecular Chemistry, University of Regensburg, Universitätsstrasse 31, D-8400, Regensburg, (Germany) aut NATIONALLICENCE 700 1- Heckmann K. Institute of Physical and Macromolecular Chemistry, University of Regensburg, Universitätsstrasse 31, D-8400, Regensburg, (Germany) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 163/1(1992-11-01), 47-57 0236-5731 163:1<47 1992 163 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer