膜精制低不饱和度聚醚多元醇模型  

A model for the membrane purification of low unsaturated polyether polyols

作　　者：杨柳[1] 马卫华[1] 戚莉 钟秦[1] 

机构地区：[1]南京理工大学化工学院,南京210094 [2]江苏钟山化工有限公司,南京210038

出　　处：《膜科学与技术》2012年第4期61-65,共5页Membrane Science and Technology

基　　金：江苏省科技成果转化专项资金项目(BA2009016);南京理工大学自主科研专项计划资助(2010ZYTS018)

摘　　要：采用错流平板膜超滤技术,使用聚醚砜超滤膜精制低不饱和度聚醚多元醇,粗聚醚多元醇由正己烷1∶1体积比稀释.在前期对操作压力、料液流速等条件研究的基础上,采用阻力叠加法建立膜通量与各影响因素之间的数学模型,通过实验数据拟合模型参数.结果表明:模型拟合值曲线与实验数据拟合良好,各曲线的相关系数均在0.97以上,且膜通量的理论值与实验值之间的相对偏差较小,在0.13%～14.02%范围内.根据该数学模型,可以预测不同操作条件下的膜通量值,同时为精制工艺的工业化生产提供有效的工艺参数.A flat ultrafiltration membrane, which was prepared from polyethersulphone（PES）, was used to purify low unsaturated degree polyether polyols. The crude polyether polyols were used as polyols/hexane miseella in a 1 ： 1 molar ratio. Based on the studies on operating pressure and liquid flow speed, a mathematic resistance model describing membrane flux as a funetion of pressure and flow rate was established, and the model parameters were got by fitting the experimental data. The resullts show that the predicted results of membrane flux as a function were in good agreement with the experimental results well, with a relative deviation varying between 0. 13%-14. 02%, and the correlation coefficients were all above 0. 97. Using this model, flux change can be predicted and the effective process parameters were provided for the industrial purification process.

关 键 词：聚醚多元醇 膜通量 浓差极化 数学模型 

分 类 号：TQ316[化学工程—高聚物工业]