A New "green" extractant of the diglycol amic acid type for lanthanides

Naganawa, Hirochika; Shimojo, Kojiro; Mitamura, Hisayoshi; Sugo, Yumi; Noro, Junji*; Goto, Masahiro*

Solvent Extraction Research and Development, Japan, 14, p.151 - 159, 2007/00

JP, 2006-157842   Licensable Patent Information Database   Patent publication (In Japanese)

A compound having diglycol amic acid frame, DODGAA, has been synthesized as a new "green" extractant for lanthanides. The new extractant composed, hydrogen, oxygen, and nitrogen atoms is fully combustible to gases without solid waste and its solubility in water is found to be very low. These properties enable us to avoid the burden of industrial waste produced by the incineration of deteriorated extractant and the risk of aquatic environmental pollution. In the extraction ability for lanthanide ions and the ability for their mutual separation, DODGAA is much superior to carboxykic acid type extractants, such as Versatic10, that can also be completely combustible. The extraction and separation performance of DODGAA is comparable to that of organophosphorus extractants, such as PC-88A and DEHPA, that are widely used in current industry but less "green".