二-(2-乙基己基)磷酸-石蜡萃取镧(Ⅲ)机理的研究

Study on the Mechanism of Extraction of Lanthanum(Ⅲ) with Di-(2-Ethylhexyl) phosphoric Acid-Wax

报导二-(2-乙基己基)磷酸-石蜡体系萃取镧(Ⅲ)的机理,测得其萃合物为La(HA_2)_3考查了温度对萃取L_a^3-的影响,求得不同pH下的萃取反应热。

The mechanism of extraction of Lanthanum(Ⅲ) with di-(2-ethylhexyl) phosphoric acid-wax has been studied. The extracted species has been found to be La(HA2)3 and their composition has been introduced. The influence factors of temperature to extraction of Lanthanum(Ⅲ) have been examined. The extraction reaction heat at pH=1.68 and pH=1.49 have been found to be -7.66KJ and -9.19KJ respectively.