Details

Autor(en) / Beteiligte

• Scharf, Christiane
• Ditze, André
• Schwerdtfeger, Klaus
• Fürmeier, Sven

Titel

Investigation of the Structure of Neodymium-Di-(2-Ethylhexyl) Phosphoric Acid Combinations Using Electrospray lonization and Matrix-Assisted Laser Desorption Ionization Mass Spectrometry and Nuclear Magnetic Resonance Spectroscopy

Ist Teil von

• Metallurgical and materials transactions. B, Process metallurgy and materials processing science, 2005-08, Vol.36 (4), p.429

Ort / Verlag

New York: Springer Nature B.V

Erscheinungsjahr

2005

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Neodymium-di-(2-ethylhexyl) phosphoric acid (DEHPA) species forming in the organic phase during solvent extraction of neodymium with solutions of DEHPA have been studied. Two samples were prepared: one with a low molar ratio of neodymium to DEHPA, which is liquid and clear, and the other with a high molar ratio of neodymium to DEHPA (complete loading), which has the consistency of a gel. Electrospray ionization (ESI) and matrix-assisted laser desorption ionization (MALDI) mass spectrometric investigations show numerous compounds, in addition to the generally assumed species dimeric DEHPA and Nd(DEHP.DEHPA)^sub 3^, in the liquid sample. The nuclear magnetic resonance (NMR) spectroscopic investigation of pure DEHPA and of a completely loaded sample confirm the formula of pure DEHPA and of the organic part of Nd(DEHP)^sub 3^. Furthermore, chemical analysis of a dried, completely loaded sample also proves the existence of the species Nd(DEHP)^sub 3^. Results of X-ray powder diffraction measurements of this sample agree well with literature data. [PUBLICATION ABSTRACT]