基于DOTP脱色的膜分离-树脂吸附集成技术研究  

Decolourization of Crude Dioctyl Terephthalate by Membrane Separation and Resin Adsorption Technology

作　　者：张莉[1,2] 何本桥 

机构地区：[1]天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室培育基地 [2]天津工业大学材料科学与工程学院,天津300160

出　　处：《胶体与聚合物》2010年第4期161-163,共3页Chinese Journal of Colloid & Polymer

基　　金：国家高科技(863)计划(2009AA03Z223);天津市应用基础及前沿技术研究计划(08JCYBJC26400)

摘　　要：以聚偏氟乙烯中空纤维膜(PVDF)、阴离子交换树脂作为膜分离-树脂吸附集成技术的分离材料应用于对苯二甲酸二异辛酯(DOTP)粗酯的脱色,采用紫外可见光谱(UV-VIS)和薄层色谱扫描仪(TLCS)测试方法分析膜分离-树脂吸附集成工艺的脱色效果和机理。结果表明:PVDF中空纤维膜在30℃操作温度下有较高脱色率,主要截留掉DOTP粗酯中的胶质和大颗粒物质,阴离子交换树脂可进一步脱去DOTP粗酯中的小分子有色物质和残留颗粒状物质。DOTP粗酯经过膜分离-树脂吸附集成技术脱色处理,DOTP颜色到达产品标准要求。Polyvinylidene fluoride（PVDF） hollow fiber ultrafiltration membranes,anion exchange resins were used as materials in an integrate technology of membrane separation and resin absorption （MS-RA） process for decolorizing the crude DOTP.UV-visible absorption spectra and Thin Layer Chromatography Scanning（TLCS） were employed to assess the decolorization efficiency of MS-RA process and to illustrate the separation mechanism.Results show that PVDF membrane has high decolourization efficiency under the operating temperature of 30℃due to removing the gums and aggeragates in crude DOTP.Anion exchange resin 4~# was applied to further remove the small molecular coloured components and residual large particle impurities in the DOTP permeate.After decoloraziton by the integrate technology of MS-RA for crude DOTP,the color of DOTP product can meet the standards of commercial product.

关 键 词：增塑剂 脱色 对苯二甲酸二异辛酯 树脂 中空纤维膜 

分 类 号：TQ414[化学工程] O632.1[理学—高分子化学]