从苯酐生产废水中萃取富马酸  

Extraction of Fumaric Acid from Wastewater in Phthalic Anhydride Production

作　　者：张爱丽[1] 孙丽娟[2] 杨桦[1] 金若菲[1] 李玉明[1] 

机构地区：[1]大连理工大学环境与生命学院,辽宁大连116024 [2]大连医科大学附属二院,辽宁大连116023

出　　处：《化工环保》2004年第3期206-209,共4页Environmental Protection of Chemical Industry

摘　　要：用三辛癸胺和三辛胺为萃取剂,在无稀释剂的条件下,对苯酐生产废水中的富马酸进行了络合萃取研究。研究结果表明,萃取剂的负荷量与相比呈递减的幂函数关系,三辛癸胺比三辛胺的络合酸度大;温度对萃取处理效果有明显影响,温度为10～40℃时,萃取剂的负荷量随着温度的升高而增加,但温度过高易造成乳化,最佳操作温度为30～40℃;用氢氧化钠溶液再生萃取剂,最佳反萃操作条件为:振荡时间60s、相比(水/油,体积比)2、温度60℃、碱液质量浓度12g/L;萃取剂9次循环萃取和再生使用过程中,萃取率稳定在71 8%±1 7%,再生效率稳定在94 3%±1 9%,9次循环后萃取剂的损失量为4%;从每吨废水中可回收富马酸4 8kg,可获益24元。The extraction of fumaric acid from wastewater in phthalic anhydride production was studied using TOA(tri-n-octyl amine)and TODA(tri-n-octyl/decyl amine)as extractants and without diluting agent.There is a degression power function between extractant loading and phase ratio.The extraction power of TODA is higher than that of TOA.The influence of temperature on extraction efficiency is evident.The extractant loading is enhanced with temperature increasing at 10～40℃,but it is easier to form emulsion at too higher temperature.The optimum temperature is 30～40℃.The charged extractants can be regenerated by NaOH solution with the optimum operating conditions as follows:oscillating time 60 s,phase ratio 2,temperature 60℃,NaOH mass concentration 12 g/L.The average extraction efficiency of 9 times is 71.8%±1.7%,and the regeneration efficiency is 94.3%±1.9%.The loss of extractants is 4%.The recovery of fumaric acid is (4.8 kg/t.)

关 键 词：苯酐废水 萃取 富马酸 综合利用 

分 类 号：X783[环境科学与工程—环境工程]