Extraction of Np(Ⅳ) From Nitric Acid Solution With Di(1-Methyl-Heptyl) Methyl Phosphonate

Authors :: XIAO Zhe
LI Feng-feng
WANG Yi-lin
ZHANG Ye
YU Ting
JIA Hong-wei
HE Hui
YE Guo-an
Source :: He huaxue yu fangshe huaxue, Vol 44, Iss 2, Pp 178-185 (2022)
Publication Year :: 2022
Publisher :: Editorial Office of Journal of Nuclear and Radiochemistry, 2022.
Abstract: The extraction of Np(Ⅳ) from nitric acid medium by using di(1-methyl-heptyl) methyl phosphonate diluted in kerosene was investigated. The influences were studied in this research including the contact time, the concentration of DMHMP, HNO3 as well as nitrate and the temperature. Slope analyses indicate that Np(Ⅳ) is coordinated mainly in the form of neutral molecules and the extractant complex is Np(NO3)4·2DMHMP. The value of enthalpy change for the reaction is negative which means that the extraction of Np(Ⅳ) is an exothermic process.

Subjects :: di(1-methyl-heptyl) methyl phosphonate
extraction
np(ⅳ)
Nuclear engineering. Atomic power
TK9001-9401
Chemical technology
TP1-1185

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