萃取-吸附法处理辛醇废碱液  

Study on extraction and adsorption treatment of aldolisation spent caustic

作　　者：马克存 李向富[2] 左艳梅 

机构地区：[1]中国石油大庆化工研究中心,黑龙江大庆163714 [2]中国石油四川石化有限责任公司,四川成都611930

出　　处：《化工进展》2016年第5期1544-1548,共5页Chemical Industry and Engineering Progress

摘　　要：辛醇废碱液中含有大量有机物,为此开展了萃取-大孔树脂吸附法处理辛醇废碱液、高效回收有机物的实验研究,实验结果表明：当辛醇废碱液的ρ（COD）为104651mg/L时,以辛醇为萃取剂,在p H=3、辛醇与辛醇废碱液的体积比为0.5、萃取级数为2等条件下,出水ρ（COD）可降至6453mg/L以下,COD去除率达到93.8%以上,萃取剂辛醇可以通过精馏再生循环利用;采用HYA-106大孔吸附树脂对辛醇二级萃取出水进行吸附处理,HYA-106大孔吸附树脂较佳的吸附流速为1BV/h、温度为40℃,此时出水ρ（COD）平均在155~183mg/L之间,COD去除率在97.1%~97.4%之间,单位体积树脂的废水处理量为34BV以上,树脂吸附量在213~215mg COD/m L树脂之间,吸附-解吸效果稳定;萃取-吸附工艺的COD总去除率达到99.8%以上,最大程度地实现了辛醇废碱液中有机物的回收。Extraction and adsorption was adopted in sequence to remove the large amount of organics in the aldolisation spent caustic,wherein 2-ethyl hexanol was used as extractant which was then recovered by rectification,and HYA-106 macroporous resin was used for adsorption which showed stable adsorption-desorption performance. The results showed that under the conditions of p H=3,the volume ratio of 2-ethyl hexanol to spent caustic was 0.5 and the extraction stages was 2,ρ（COD） of the spent caustic could be decreased from 104651mg/L to 6453mg/L,while the ρ（COD） removal rate reached over 93.8%. At 40℃,the adsorption rate of HYA-106 macroporous adsorption resin was 1BV/h, ρ（COD） of the extraction effluent was decreased to 155—183mg/L,while ρ（COD） removal rate was 97.1%—97.4%. The total ρ（COD） removal rate of the combined extraction and adsorption process reached more than 99.8%,showing the organics in the spent caustic was removed to a maximal extent.

关 键 词：萃取 吸附 再生 大孔吸附树脂 辛醇 废碱液 

分 类 号：X703.1[环境科学与工程—环境工程]