高盐含酚工业废水的脱酚工艺研究与优化  

Study and optimization of dephenolization process for industrial wastewater containing high concentration salt and phenol

作　　者：张潆心 蒋文伟[1] 焦高成 彭小双 曾鸿锟 ZHANG Ying-xin;JIANG Wen-wei;JIAO Gao-cheng;PENG Xiao-shuang;ZENG Hong-kun(School of Chemical Engineering,Sichuan University,Chengdu 610207,China;Haohua Yuhang Chemical Industry Co.,Ltd.,Jiaozuo 454002,China)

机构地区：[1]四川大学化学工程学院,四川成都610207 [2]昊华宇航化工有限责任公司,河南焦作454002

出　　处：《现代化工》2024年第S01期201-206,212,共7页Modern Chemical Industry

摘　　要：研究了磷酸三丁酯(TBP)-煤油体系在对硝基苯酚(PNP)工业废水中的萃取工艺,TBP与PNP主要形成1∶1型的络合物,萃取过程的ΔH=-28.21 kJ/mol,废水中盐的存在对络合萃取有正向影响。采用单因素实验法考察了萃取剂浓度、搅拌转速、有机相/水相的体积比(O/A)对脱酚率以及化学需氧量(COD)去除率的影响。根据单因素实验结果,设计三因素三水平Box-Behnken模型进行响应面优化实验。实验结果表明,响应面优化后的最优工艺条件为:TBP浓度为28%,搅拌转速为187 r/min,相比为0.6,该条件下脱酚率为99.97%,单级萃取后萃余水相酚含量为0.12 mg/L。The extraction process for p⁃nitrophenol(PNP)industrial wastewater by tributyl phosphate(TBP)⁃kerosene system is studied.TBP and PNP mainly forms a 1∶1 complex,the extraction processΔH=-28.21 kJ·mol^(-1),and the presence of salt in wastewater has a positive effect on the complex extraction.The impacts of extractant concentration,stirring speed,and organic phase/water phase volume ratio(O/A)on the removal rates of phenol and chemical oxygen demand(COD)are investigated by using single factor experiment.According to the results from single factor experiment,a three⁃factor three⁃level Box⁃Behnken model is designed for response surface optimization experiment.Experimental results show that the optimal process conditions after the response surface optimization are as follows:the concentration of TBP is 28%,the stirring speed is 187 r·min^(-1),and O/A is 0.6.Under these conditions,the removal rate of phenol is 99.97%,and phenol content in the raffinate water phase after single stage extraction is 0.12 mg·L^(-1).

关 键 词：磷酸三丁酯 对硝基苯酚 响应面 含酚废水 

分 类 号：TQ09[化学工程]