三辛胺/正辛醇/煤油体系络合萃取处理6-硝生产废水  

Treatment of 6-Nitry Wastewater by Complex Extraction Process

作　　者：原金海[1,2] 张敏[1] 

机构地区：[1]重庆科技学院化学化工学院,重庆401331 [2]重庆大学西南资源开发与环境灾害控制工程教育部重点实验室,重庆400030

出　　处：《工业安全与环保》2011年第4期9-11,共3页Industrial Safety and Environmental Protection

摘　　要：对萘磺酸类有机废水进行络合萃取研究,采用西南某化工厂6-硝(6-硝基-1,2-重氮氧基萘-4-磺酸)生产过程中产生的1,2,4-酸废水作为研究对象。通以三辛胺为络合剂,正辛醇为助溶剂,煤油为稀释剂,以萃取-反萃取体系处理1,2,4-酸废水,通过正交实验确定最佳萃取工艺条件为:络合剂与助溶剂、稀释剂的体积比为4∶1∶5。废水pH值为1.7,最佳萃取相比O/A为1∶5。废水经一级萃取后,其COD由原来的17.2 g/L降至1.84 g/L,COD去除率达到89%。反萃的最佳工艺参数为:采用15%NaOH溶液,反萃体系相比为2∶1,反萃温度为40℃,静置6 h分层,反萃取效率为84%。In this paper,the naphthalenesulfonic acid wastewater is treated by complex extraction process.The 1,2,4-acid wastewater,produced in the production of 6-nitry（6-nitro-1-diazo oxygen naphthalene-4-acid）in one chemical plant,is studied,in which TOA is selected as the extractant,octanol as the solvents and kerosene as the thinner.The optimal extraction conditions is determined by orthogonal experiments as follows： the volume ratio of TOA to octanol and to kerosene is 4∶1∶5,the volume ratio of oil phase to water phase,ie.O/A=1∶5,pH value is 1.7;COD is reduded from 17.2 g/L to 1.84 g/L after extracted and the removal rate of COD can reach 89%;15% of NaOH is selected as the back-extractant reagent,in which the volume ratio of oil phase to water phase is 2∶1,back-extraction temperature is 40 ℃,standed for 6 h and the removal rate of COD can reach 84%.

关 键 词：三辛胺 正辛醇 煤油 络合萃取 1 2 4-酸 萘磺酸 

分 类 号：X783[环境科学与工程—环境工程]