化工进展2011，Vol.30Issue(12)：2606-2610,5.
膜分离法精制低不饱和度聚醚多元醇
Experimental study on the purification of low unsaturated degree polyether polyols with membrane separation
摘要
Abstract
Purification of polyether polyols,ZSN-330,with low unsaturated degree was studied by using ultrafiltration membrane prepared from polyethersulphone（PES）.Crude polyether polyols were used as polyols/hexane miscella in a 1∶1 proportion.The intercepting rate of zinc and cobalt ions were more than 90% and the content of zinc and cobalt ions were less than 1 ？g/g among most tests.The double metal cyanide catalysts（DMC）was found in the residue by IR test.The effects of molecular weight cut-off,feed liquid viscosity,operating pressure,flow speed on permeate flux were investigated.The optimal operating condition of ultrafiltration were determined as molecular weight cut-off 150 kDa,diluting by hexane in a 1∶1 proportion,operating pressure 0.5 MPa,flow speed 40 L/h.The contaminated membrane was ultrasonic cleaned by deionized water,2‰ sodium hydroxide solution,hexane,respectively.The one cleaned by 2‰ sodium hydroxide solution,can recover up to 66.4% permeate flux,better than other two solutions.关键词
聚醚多元醇/低不饱和度/精制/膜分离/膜通量Key words
polyether polyols/low unsaturated degree/purification/membrane separation/membrane flux分类
化学化工引用本文复制引用
杨柳,马卫华,戚莉,钟秦..膜分离法精制低不饱和度聚醚多元醇[J].化工进展,2011,30(12):2606-2610,5.基金项目
江苏省科技成果转化专项资金项目 （）
