The extraction behaviour of Zr in TBP-laurc-hydrcxaroic acid (LHA)-kerosene-HNO3 and LHA-chloicbenzene-xylece-FNO3 systems is studied. The factors influencing the retention cf Zr in organic phase scrubbed by 0.01 mol/1 HNO3 and 5% Na2CO3 solution are also studied. The mechanism of extraction of Zr by LHA is studied preliminarily. The composition of the complex extracted is found to be Zr(NO3)2 (CH3(CH2)10CONEO)2. With the presence of LHA in TBP-kerosene-HNO3 systerr, the distribution coefficient and retenti...