三聚甲醛-甲醛-水-[BMIM][NO_(3)]的气液相平衡研究  

Vapor-Liquid Equilibrium of Trioxane-Formaldehyde-Water-[BMIM][NO_(3)]System

作　　者：李飞 张涛[1] 吕莉[1] 唐文翔 唐盛伟[1] LI Fei;ZHANG Tao;LYU Li;TANG Wenxiang;TANG Shengwei(School of Chemical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学化学工程学院,成都610065

出　　处：《华东理工大学学报（自然科学版）》2024年第6期795-801,共7页Journal of East China University of Science and Technology

基　　金：中央高校基本科研业务费(2022SCUH0041,SCU2023D012)。

摘　　要：研究了离子液体1-丁基-3-甲基咪唑-硝酸盐([BMIM][NO_(3)])对甲醛-水(FA-H_(2)O)、三聚甲醛-水(TOX-H_(2)O)体系的气液相平衡的影响。结果表明,[BMIM][NO_(3)]的加入可以有效改善体系的气液相平衡,加入摩尔分数为0.070的[BMIM][NO_(3)]可以使共沸现象消失。将非随机双液(NRTL)模型用于关联实验数据,TOX-H_(2)O-[BMIM][NO_(3)]三元物系计算值与实验值的平均相对偏差为1.32%,FA-H_(2)O-[BMIM][NO_(3)]三元物系计算值与实验值的平均相对偏差为1.74%。测定了TOX-FA-H_(2)O-[BMIM][NO_(3)]的气液平衡数据,结果表明,[BMIM][NO_(3)]的加入可以使平衡时气相中的TOX摩尔分数增加17.49%。研究结果对提高气相中TOX的摩尔分数具有理论指导意义。The effects of ionic liquids[BMIM][NO_(3)]on the vapor-liquid equilibria of formaldehyde-trioxane-water(FA-TOX-H_(2)O)systems were studied.The results showed that adding[BMIM][NO_(3)]could effectively improve the vapor-liquid equilibrium of the system,and adding a certain amount of[BMIM][NO_(3)]could eliminate the azeotrope phenomenon.The non-random two-liquid(NRTL)model was used to fit the experimental data.The average relative deviation between experimental and calculated values of the TOX-H_(2)O-[BMIM][NO_(3)]ternary system was 1.32%,and that of the FA-H_(2)O-[BMIM][NO_(3)]ternary system was 1.74%.The vapor-liquid equilibrium of TOX-FA-H_(2)O-[BMIM][NO_(3)]was measured.The results showed that the addition of[BMIM][NO_(3)]could increase the molar fraction of TOX in the vapor phase by 17.49%.The results are significant for increasing the molar fraction of TOX in vapor phase.

关 键 词：三聚甲醛 甲醛 气液平衡 离子液体 NRTL模型 

分 类 号：TQ311[化学工程—高聚物工业]