高压离子交换排代法富集锂同位素(Ⅱ)——HETP计算和富集条件  

ENRICHMENT OF LITHIUM ISOTOPES BY HIGH PRESSURE ION EXCHANGE DISPLACEMENT CHROMATOGRAPHY (Ⅱ)——CALCULATION OF HETP AND ERICHMENT CONDITIONS

作　　者：凌达仁 郑祖英 岳廷盛 杨坤山 王娅妮 徐惠群 Ling Daren;Zheng Zuying;Yue Tingsheng;Yang Kungshan;Wang Yani;Xu Huiqun(Department of Modern Physics,Lanzhou University,Lanzhou)

机构地区：[1]兰州大学现代物理系

出　　处：《高等学校化学学报》1983年第4期481-486,共6页Chemical Journal of Chinese Universities

摘　　要：本文根据“精馏平衡塔板型”富集同位素理论提出了富集同位素时计算HETP的方法,寻找出富集和实验参数之间的关系,并进行了讨论;表明Glueckanf塔板理论和Snyder公式适用于简单排代机制的轻同位素富集过程。This paper describes a new method of calculating the height equialent to a theoretical plate (HETP) from the value of the total enrichment of the species to be enriched in the unsteady band (E’e) according to the equilibrium theory of the distillation type used for enriching isotopes. From this, the quantitative relations between the total enrichment and the experimental parameters are established.The results show it is favorable for reaching a high enrichment degree for a short time if the conditions with low concentration of eluent, high linear flow rate and long adsorption band are adopted for enriching lithium isotopes and that Glueckauf’s theory and Snyder’s formula are also suitable for light isotopes enrichment process with simple displacement mechanism.In this connection, 0.079M CaAc2 is chosen as the eluent, 9.9cm/min as the linear flow rate and 2.35m as the length of lithium band with the natural abundance. After the band is eluted under these chosen conditions for about 140m (17days), the quantities of lithium isotopes at the edges of the band reach up to 97.5% in 7Li and 15.8% in 0Li respectively.

关 键 词：富集条件 塔板理论 同位素 离子交换 (Ⅱ) 实验参数 

分 类 号：P61[天文地球—矿床学]