Self-Assembling Structures in the Extraction
of Some Rare Earth Elements in Systems with D2EHPA

E. N. Golubina and N. F. Kizim

Novomoskovsk’s Institute of the Mendeleev University of Chemical Technology of Russia,
ul. Druzhby 8, Novomosskovsk, Tula Region, 301665 Russia

Received July 22, 2011

Abstract—Effect of different factors on the formation of self-assembling structures in a dynamic interfacial
layer in LnA₃–H₂O–D2EHPA–solvent extraction systems was studied. Increase in temperature was shown to
inhibit the formation of the self-assembling structures. An exposure of dynamic interfacial layer to mechanical
vibrations using a microvibrator was found to prevent structurization and provide higher aggregative stability
of disperse system. The structure deteriorates when exposed to vibration and decomposes to aggregates at rather
high power. On the extraction of rare earth elements (REE) of yttrium subgroup, the system partially recovers
its properties after termination of exposure to vibration, i.e., it is coagulation and thixotropic and becomes con-
densation in time.

DOI: 10.1134/S0036023612090070

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