提溴废液脱色净化研究  

Study on purification and decolorization of waste liquid from bromine extraction

作　　者：陈侠[1] 王华文[1] 栾晓东[1] 齐永新[1] 高晓晔[1] 

机构地区：[1]天津科技大学海洋科学与工程学院,天津海洋资源与化学重点实验室,天津300457

出　　处：《无机盐工业》2014年第11期47-50,共4页Inorganic Chemicals Industry

基　　金：天津市自然科学基金(13JYBJC18600);天津市科技兴海项目(KJXH2012-04)

摘　　要：提溴废液是海水日晒制盐-提钾-提溴后的母液，其氯化镁质量浓度高达400，450e4L．但其浊度和色度均较大，影响其加工的精细化工产品色泽和质量。研究了对提溴废液进行物理法脱色和化学法脱色。结果表明。提溴废液的色度是由有机有色物质造成的；砂滤能很好地去除悬浮物，使浊度从40．9NTU降到约2NTU．但脱色率仅为41％：活性炭吸附的脱色率为60％．砂滤和活性炭吸附的脱色效果均不理想。最佳实验条件下次氯酸钠和双氧水的脱色率分别为80％和79％，能达到较好的脱色效果，综合氧化时间、氧化温度考虑，次氯酸钠脱色优于双氧水脱色；为此提溴废液脱色净化工艺选择砂滤预处理＋次氯酸钠脱色，脱色的最佳条件：次氯酸钠加入量8％（质量分数）、pH=6．0、氧化时间为40min、脱色率为80％。Waste liquid from bromine extraction was the mother liquid of sun salt water after potassium extraction and bromine extraction.Its mass concentration of MgC12 reached 400~450 g/L,but the larger turbidity and chroma affected the quality of fine chemicals processed from it.So physical and chemical decolorizations were studied.Results showed that the color of bromine liquid waste was mainly composed of organic coloring substances;sand filtration effectively removed the suspended solids,reduced the turbidity from 40.9 NTU to about 2 NTU,but the decolorization rate was only about 41% ; active carbon decolorization rate was 60% ,the decolorization rates of both sand filtration and active carbon were not ideal. Under the best experimental conditions, the decolorization rates of NaCIO and H202 were 80% and 79%, respectively, which achieved better decolorizaiton effect;comprehensive consideration of oxidation time and oxidation temperature,the decoioriation effect of NaCIO was better than that of H202;the purification and decolorization technology of waste liquid of bromine system was pretreated by sand filtration and decolorized through NaC10, and the best decolorization conditions as follow：the adding amount of NaCIO was 8% （mass fraction）, pH=6.0, oxidation time was 40 min, and the decolorization rate was 80%.

关 键 词：提溴废液 过滤 吸附 氧化 脱色 

分 类 号：TQ124.5[化学工程—无机化工]