膜分离法精制低不饱和度聚醚多元醇的模型研究
作者:杨  柳1,马卫华1,戚  莉2,钟  秦1
单位: 1.南京理工大学化工学院,江苏 南京 210094;2.江苏钟山化工有限公司,江苏 南京 210038
关键词: 聚醚多元醇;膜通量;浓差极化;数学模型
DOI号:
分类号:
出版年,卷(期):页码: 2012,32(4):61-65

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0.99左右,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。
Flat membrane ultrafiltration was applied to purification of low unsaturated degree polyether polyols, which flat membrane prepared from polyethersulphone(PES). Crude polyether polyols were used as polyols/hexane miscella in a 1:1 proportion. Based on the studies on operating pressure and flow speed, a mathematic resistance model describing membrane flux as a function of pressure and flow rate was established, and the model parameters were got by fitting the experimental data. The resullts showed that the predicted results of membrane flux as a function were in good agreement with the experimental results well, with a relative error varying between 0.13%~14.02%, and the correlation coefficients were all around 0.99. Using this model, flux change can be predicted and the effective process parameters were prvided for the industrial purification process.

基金项目:
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)

作者简介:
杨柳(1987-),女,吉林梨树人,硕士生,从事聚醚多元醇方向的研究..*联系人.

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