Nitric Acid and Water Extraction by T2EHDGA in n -Dodecane

Campbell, Emily L.; Holfeltz, Vanessa E.; Hall, Gabriel B.; Nash, Kenneth L.; Lumetta, Gregg J.; Levitskaia, Tatiana G.

doi:10.1080/07366299.2017.1400161

Title: Nitric Acid and Water Extraction by T2EHDGA in n -Dodecane

Journal Article · Fri Nov 10 00:00:00 EST 2017 · Solvent Extraction and Ion Exchange

DOI:https://doi.org/10.1080/07366299.2017.1400161· OSTI ID:1430430

Campbell, Emily L. ^[1]; Holfeltz, Vanessa E. ^[2]; Hall, Gabriel B. ^[3]; Nash, Kenneth L. ^[4];

^[3]; Levitskaia, Tatiana G. ^[3]

Pacific Northwest National Laboratory, Richland, Washington, USA; Chemistry Department, Washington State University, Pullman, Washington, USA
Pacific Northwest National Laboratory, Richland, Washington, USA; School of Nuclear Science and Engineering, Oregon State University, Corvallis, OR
Pacific Northwest National Laboratory, Richland, Washington, USA
Chemistry Department, Washington State University, Pullman, Washington, USA

Liquid-liquid distribution behavior of nitric acid (HNO3) and water by a diglycolamide ligand, N,N,N',N'-tetra-2-ethylhexyldiglycolamide (T2EHDGA) into n-dodecane diluent was investigated. Spectroscopic FTIR and NMR characterization of the organic extraction solutions indicate T2EHDGA carbonyl coordinates HNO3 and progressively aggregates at high acid conditions. Water extraction increases in the presence of HNO3. The experimentally observed distribution of HNO3 was modeled using the computer program, SXLSQI. The results indicated that the formation of two organic phase species—HNO3·T2EHDGA and (HNO3)2·T2EHDGA—satisfactory describes the acid transport behavior. Temperature dependent solvent extraction studies allowed for determination of thermodynamic extraction constants and ΔH and ΔS parameters for the corresponding extractive processes.

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Research Organization:: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-76RL01830

OSTI ID:: 1430430

Report Number(s):: PNNL-SA-125907; AF5805010

Journal Information:: Solvent Extraction and Ion Exchange, Vol. 35, Issue 7; ISSN 0736-6299

Publisher:: Taylor and Francis

Country of Publication:: United States

Language:: English

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