研究了P_(229)萃取剂从盐酸及硝酸溶液中的萃取。结果表明,P_(229)萃取Tb~(3+),Tm~(3+)的分配比D在硝酸介质中比在盐酸介质中大。获得在15—55℃下P_(229)萃取Tb~(3+),Tm~(3+)的热效应数据及温度函数。数据表明,由于ΔH>0,ΔS<0,反应主要依体系焓变促成。计算了萃取络合物的热分解反应动力学参数表观活化能E及反应级数。可信度>95％。
The distribution ratio of extraction of Tb~(3+) and Tm~(3+) with extrac-tant P_(229) from the solution of HNO_3 is greater than that from HCl. The thermal ef-fect data of extraction under 15--55℃ show △H>0 and △S<0, and enthalpy va-riation makes the reaction in progress. The properties and behaviour of thermaldecomposition of Tb(HA_2)_3 and Tm(HA_2)_3 solid complexes were studied by usingFreeman and Carroll's calculation method. The kinetic parameter of the thermal de-composition reaction of Tb(HA_2)_3 and Tm(HA_2)_3 extraction complexes was calcula-ted and the data reliability is more than 95%.
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