Extraction of levulinic acid using tri-n-butyl phosphate and tri-n-octylamine in 1-octanol: Column design
Extraction of levulinic acid using tri-n-butyl phosphate and tri-n-octylamine in 1-octanol: Column design
复制标题
DOI：
10.1016/j.jtice.2016.07.002
复制
发表时间：
2016-09
影响因子：
5.7
通讯作者：
D. Datta;M. E. Marti;H. Uslu;Sushil Kumar
中科院分区：
文献类型：
--
作者：
D. Datta;M. E. Marti;H. Uslu;Sushil Kumar
研究了2种不同萃取剂[磷酸三正丁酯(TBP)和三正辛胺(TOA)]在298℃下以正辛醇为萃取剂对乙酰丙酸的反应萃取行为，利用平衡数据计算了分配系数(Kd)、萃取效率(%E)和装载率(Z)。TOA为正辛醇提供了最高的KD值。用0.689摩尔/kg的TOA提取乙酰丙酸的最大KD为9.571，乙酰丙酸得率为90.54%。增加初始酸浓度会导致萃取率下降。TBP的负载率小于1，而两种类型，即1：1和2：1的酸胺络合物有望与TOA形成。通过计算乙酰丙酸回收率90%所需的最小剂料比、理论级数、萃取柱的高度和直径来评价萃取工艺的可行性。
The reactive extraction of levulinic acid using two different extractants [tri-n-butyl phosphate (TBP) and tri-n-octylamine (TOA)] dissolved in 1-octanol was investigated at 298 K. Using the equilibrium data, the distribution coefficient (KD), extraction efficiency (%E) and loading ratios (Z) were calculated. TOA provided highestKDvalues with 1-octanol. A maximumKDwas obtained as 9.571 using 0.689 mol/kg TOA while 90.54 % of the initial levulinic acid was extracted. Increasing the initial acid concentration resulted in a decrease in the extraction efficiency. Loading ratios were found to be less than 1 for TBP while both types,i.e.1:1 and 2:1 acid-amine complexes were expected to form with TOA. The feasibility of the extraction process was assessed by calculating minimum solvent to feed ratio required for 90% recovery of levulinic acid, number of theoretical stages, height and diameter of the extraction column.