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系统研究了2-乙基已氧基甲基膦酸工(2-乙基已基)酯(代号PT-28)在硝酸介质中萃取三价镧系元素的行为,讨论了萃取剂浓度的变化、硝酸钠的浓度及温度变化对萃取率的影响,并对PT-28. 萃取HNO_3的机理进行了探讨。
The extraction of trivalent lanthanides from 2-ethylhexyl methylphosphonic acid (2-ethylhexyl) ester (code name PT-28) in nitric acid medium was systematically studied. The changes of the extractant concentration , Sodium nitrate concentration and temperature on the extraction rate, and PT-28. The mechanism of extracting HNO3 was discussed.