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本文报道了CO_2/二正丁胺/三乙胺化学交换浓集稳定同位素~(13)C 1-5型级联之流量研究结果。级联的分离能力是流量的函数,当分离能力达到最大时(F_(max)=2.3mg atom C/cm~3·min),对应的流量L_(oPt)=6.3ml/cm~2·min。级联经历了三年的运转考验,每个实验平衡时间平均为五个半月。从天然丰度开始浓缩,级联最高浓度达98.97％,获得了98.6％以上的~(13)C产品,证实了这种方法能方便、可靠、直接地生产高浓~(13)C。由于解决了各级流量的理论计算问题,合理安排了级间流量收缩比,以及使用了一种新的高效填料——矩形螺旋圈,因而级联的分离效率高,在达到最高浓缩倍数时,级联的平均每米理论塔板数N=40.5 plates/m,并且分离能力也比较大。
In this paper, we report the results of the CO 2 / di-n-butylamine / triethylamine exchange exchange concentrated stable isotope (13) C 1-5 type cascade. The cascade separation capacity is a function of the flow rate. When the separation capacity reaches the maximum (F max = 2.3 mg atom C / cm -3 min), the corresponding flow rate L oPt is 6.3 ml / cm 2 min . The cascade experienced three years of running tests, with an average of five and a half months for each experiment. From the natural abundance began to concentrate, the highest concentration of cascade reached 98.97%, obtained more than 98.6% of ~ (13) C products, confirmed that this method can easily, reliably and directly produce high concentration ~ (13) C. Due to the theoretical calculation of the flow at various levels is solved, the interstage flow contraction ratio is reasonably arranged, and a new highly efficient packing - rectangular spiral ring is used. Therefore, the cascade separation efficiency is high. When the maximum concentration ratio is reached, Cascade average theoretical plates per meter N = 40.5 plates / m, and the separation capacity is relatively large.