渗透汽化法分离水溶液中低质量分数的乙酸乙酯  

Pervaporation of aqueous solution separation of low-concentration ethyl acetate

作　　者：毛凯[1] 相里粉娟[1] 陈祎玮[1] 金万勤[1] 

机构地区：[1]南京工业大学化学化工学院材料化学工程国家重点实验室,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2008年第5期16-19,共4页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家重点基础研究发展计划(2003CB615702);国家自然科学基金资助项目(20436030);江苏省自然科学基金资助项目(BK2006722)

摘　　要：为了降低乙酸乙酯工业生产的能耗,提高产品收率,进行渗透汽化法分离水溶液中低质量分数乙酸乙酯的研究.采用实验室自制的聚二甲基硅氧烷(PDMS)/陶瓷复合膜,考察乙酸乙酯的质量分数和原料液温度对渗透汽化性能的影响.研究发现,当原料液中乙酸乙酯的质量分数为7%、温度为50℃时,膜的渗透通量和分离因子分别达到8.7 kg/(m2.h)和38.1.在分离因子相当的前提下,聚二甲基硅氧烷/陶瓷复合膜的渗透通量与其他报道的膜材料相比具有明显的优势.A laboratory prepared polydimethylsiloxane（PDMS）/ceramic composite membranes was used to separate ethyl acetate （EtAc） from pervaporation of low-concentration aqueous solution to reduce the energy consumption and improve the yield. The effects of feed concentration and temperature on the separation performance were investigated. A high flux of 8.7 kg/（ m^2·h） and a separation factor of 38.1 were obtained with the feed concentration of 7% at 50 ℃. Under the condition of comparative separation factor, the flux of PDMS/ceramic composite membranes was much higher than those of the other reported membranes.

关 键 词：乙酸乙酯 渗透汽化 聚二甲基硅氧烷 陶瓷 复合膜 

分 类 号：TQ028.98[化学工程]