稀土学报(英文版)
稀土學報(英文版)
희토학보(영문판)
JOURNAL OF RARE EARTHS
2002年
5期
416-419
,共4页
乐善堂%廖伍平%李德谦%苏锵
樂善堂%廖伍平%李德謙%囌鏘
악선당%료오평%리덕겸%소장
rare earths%two phase titration%sec-octylphenoxy acetic acid%extraction
The compositions of the extracted complexes of La, Gd, Er and Y with sec-octyl-phenoxy acetic acid in heptane and the related apparent extraction equilibrium constants KM were determined using two-phase titration technique. The stoichiometric compounds for La, Gd, Er and Y should be LaA3*2.5HA, GdA3*3HA, ErA3*3.1HA and YA3*4.3HA respectively. And their pKM are 3.43, 3.46, 3.08 and 2.58 respectively.
