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氯化EVA/二氯乙烷溶液体系真空脱溶剂的传质模型研究
Study on the mass transfer model of solvent removal from CEVA/1,2-dichloroethane solution under vacuum
【摘要】 在脱溶剂初期 ,溶剂过饱和度是影响氯化EVA/二氯乙烷溶液体系脱溶剂速率的重要参数 ;在脱溶剂后期 ,还应通过高效率的表面更新来强化脱溶剂。该体系的真空脱溶剂传质模型可用气泡成核控制的起泡脱溶剂数学模型描述 ,传质速率方程可表示为r =KLa(C -Ce) n,其中 :n =2 5 .16 - 10 9.80S +179.5 2S2 -96 .87S3 ,KLa =4 0 .76 - 2 0 1.16S +319.6 2S2 - 16 2 .94 3
【Abstract】 The removal of solvent from CEVA/1,2 dichloroethane system under vacuum was studied. The result shows that the effect of supersaturation on the mass transfer parameters ( K L a , n ) depended on the supersaturation ranges. And the kinetic model of the solvent removal controlled by bubble nucleation was predicted as follows: r=K La(C-Ce) n , n=25.16-109.80S+179.52S 2-96.87S 3; K La=40.76-201.16S+319.62S 2-162.94 3.
【关键词】 氯化EVA/二氯乙烷溶液体系;
脱溶剂;
传质模型;
过饱和度;
【Key words】 CEVA/1,2 dichloroethane system; solvent removal; kinetic model; supersaturation;
【Key words】 CEVA/1,2 dichloroethane system; solvent removal; kinetic model; supersaturation;
- 【文献出处】 应用化工 ,Shaanxi Chemical Industry , 编辑部邮箱 ,2002年02期
- 【分类号】TQ311
- 【被引频次】1
- 【下载频次】68