石油化工2019，Vol.48Issue(12)：1236-1241,6.DOI:10.3969/j.issn.1000-8144.2019.12.008
环己烷萃取聚甲氧基二甲醚过程
Extraction process of polymethoxydimethyl ether by cyclohexane
摘要
Abstract
Using cyclohexane as extractant,the liquid-liquid equilibrium data of polymethoxydimethyl ether(DMMn)+water+cyclohexane system were analyzed by GC method,and the influencing factors of extracting DMMn with cyclohexane were investigated. The experimental results showed that extracting DMMn with cyclohexane was better than isopropyl ether,and the extraction selectivity coefficient of DMM3-5 was much higher than 1. At 293.15 K and normal pressure,the liquid-liquid equilibrium data of DMM3-5+water+cyclohexane system conform to the thermodynamic consistency of Hand junction correlation. Under the conditions of extraction time of 5 min and rotation speed of 100 r/min,the optimal extraction conditions were as follows:the mass ratio of extractant to reaction liquid was 1.2,and the mass ratio of water supplement to formaldehyde in reaction liquid was 2. Under this extraction condition,after 3 times of countercurrent extraction,the extraction rate of DMM2-8 was 90.86%,the loss rate of extractant was 0.87%,and the dehydration rate was 92.46%.关键词
聚甲氧基二甲醚/环己烷/相平衡/萃取/甲醛/甲缩醛Key words
polymethoxydimethyl ether/cyclohexane/phase equilibrium/extraction/formaldehyde/methylal分类
化学化工引用本文复制引用
吴艳,马博文,梁旭,王雪岭..环己烷萃取聚甲氧基二甲醚过程[J].石油化工,2019,48(12):1236-1241,6.基金项目
国家重点研发计划资助项目(2018YFB0604804). （2018YFB0604804）
