Extraction of Np(IV) and HNO 3  by Triphenylphosphine Oxide | Zendy

ElNaggar H. A. | Zendy; Shehata M. K. | Zendy; AbdelGawad A. S. | Zendy

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Extraction of Np(IV) and HNO 3 by Triphenylphosphine Oxide

Author(s) -

ElNaggar H. A.,

Shehata M. K.,

AbdelGawad A. S.

Publication year - 1971

Publication title -

zeitschrift für anorganische und allgemeine chemie

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.354

H-Index - 66

eISSN - 1521-3749

pISSN - 0044-2313

DOI - 10.1002/zaac.19713830212

Subject(s) - triphenylphosphine oxide , chloroform , chemistry , carbon tetrachloride , extraction (chemistry) , triphenylphosphine , solvent , aqueous solution , benzene , reagent , inorganic chemistry , nuclear chemistry , organic chemistry , catalysis

The extraction of Np(IV) and HNO 3 from aqueous solutions containing only this acid (1–10 M) has been studied with solutions of triphenylphosphine oxide (TPPO) in carbon tetrachloride, benzene and chloroform. The species TPPO · HNO 3 and Np(NO 3 ) 4 · 2TPPO are the most predominently extracted species; there is also experimental evidence for Np(NO 3 ) 4 · TPPO. An equilibrium “constant” of 0.7 is calculated for the extraction of HNO 3 with solutions of the reagent in CCl 4 . This value is found to fit also the measurements on TPPO in C 6 H 6 . The position of the solvent CHCl 3 is reversed, compared with the extraction of the acid and Np(IV) by the solvents CCl 4 and C 6 H 6 , respectively.

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