2-氯-4,6-二硝基-1,3-苯二酚萃取热力学研究

采用萃取平衡实验法,研究了用有机溶剂萃取水相中2-氯-4,6-二硝基-1,3-苯二酚的萃取热力学性质。考察了选用乙酸乙酯作萃取剂,苯、甲苯、环己烷和正庚烷作稀释剂时对萃取水相中2-氯-4,6-二硝基-1,3-苯二酚的影响。结果表明,萃合物的结构与稀释剂的种类有关,并且2-氯-4,6-二硝基-1,3-苯二酚在有机相中的分配系数随稀释剂介电常数的增大而增大。通过研究温度对萃取过程的影响,证实了乙酸乙酯从水相中萃取2-氯-4,6-二硝基-1,3-苯二酚的过程是一个放热过程,表观热效应ΔH=-10.088 kJ/mol。

Study on extraction thermodynamic properties of 2-chloro-4,6-dinitro-resorcinol

The thermodynamic properties of organic solvent extraction for 2-chlom-4,6-dinitm-resorcinol from aqueous phase were investigated by extraction balance test methods. Taking ethyl acetate as the extractant and different organic solvent such as benzene, toluene, cyclohexane and n-heptane as the diluent, extraction for 2-chlom-4,6-dinitro- resorcinol from aqueous phase was analyzed. The results show that structure of extract is dependent on the diluem kind. The distribution coefficient of 2-chlom-4,6- dinitre-resorcinol in the organic phase increases with the dielectric constant of the diluent. By studying the effect of temperature on extraction, it is confirmed that the extraction of 2-chloro-4,6-dinitro-resorcinol belongs to exothermal reaction process and the apparent thermal effect AH is equal to - 10.088 KJ/mol.