聚甲氧基二己基醚的合成与分离  

Synthesis and separation of polymethoxy dihexyl ether

作　　者：王雪 范娜 孙兰义 林旭锋 徐永强 商红岩 夏洋峰 安高军 WANG Xue;FAN Na;SUN Lanyi;LIN Xufeng;XU Yongqiang;SHANG Hongyan;XIA Yangfeng;AN Gaojun(College of Chemistry and Chemical Engineering in China University of Petroleum(East China),Qingdao 266580,China;Systems Engineering Institute of Academy of Military Sciences,Beijing 100071,China)

机构地区：[1]中国石油大学化学化工学院,山东青岛266580 [2]军事科学院系统工程研究院,北京10071

出　　处：《中国石油大学学报（自然科学版）》2024年第5期207-217,共11页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：科技部国家重点项目(2018YFB0604805)。

摘　　要：以强酸性阳离子交换树脂(SQUPC-4)为催化剂,正己醇和三聚甲醛(TOX)为原料,合成一种新型的含氧燃料聚甲氧基二己基醚(PODHE_(n)),考察对其合成与分离方法。结果表明:当正己醇和TOX的物质的量比为1∶0.6、反应温度为100℃、催化剂用量(质量分数)为4%、反应时间为2.5 h时,目标产物PODHE_(n)的收率超过84%;PODHE_(n)精馏过程最优工艺参数为回流比5、塔顶采出比0.338、进料塔板第5块;当精馏塔操作条件为塔压力105 kPa、塔底温度263.5℃、塔顶温度106℃时,PODHE_(1-3)纯度超过99.9%;PODHE_(1-3)具有十六烷值高(大于75),低温性能优异(凝点为-52.0℃、冷滤点为-35.0℃)、安全性能好(闪点为116.0℃)、净热值高(37.4 MJ/kg)等优点,各项性能指标可满足或接近于车用柴油国家标准的技术要求,是一种性能优良的柴油调合组分。A new kind of oxygenated fuel polymethoxy dihexyl ether(PODHE_(n))was synthesized from n-hexanol and trioxymethylene(TOX)using acid cation exchange resin(SQUPC-4)as catalyst.The synthesis and separation of the reaction were investigated as well.The results show that the yield of PODHE_(1-3)is more than 84%when the molar ratio n(n-butanol)/n(TOX)is 1∶0.6,the reaction temperature is 100℃,the amount of catalyst(mass fraction)is 4%,and the reaction time is 2.5 h,.The optimal process parameters for the PODHE_(n) rectification process are:reflux ratio is 5,tower top recovery ratio is 0.338,and feed position is the fifth block.Under these conditions,the purity of PODHE_(1-3)could reach 99.9%when the column pressure is 105 kPa,the bottom temperature is 263.5℃,and the top temperature is 106℃.PODHE_(1-3)has the advantages of high cetane number(more than 75),excellent low temperature performance(freezing point of-52.0℃,and cold filter plugging point of-35.0℃),good safety performance(flash point of 116.0℃),high net calorific value(37.4 MJ/kg),etc.The performance indexes meets or approaches the technical requirements of the national standard of vehicle diesel,and it is a diesel blending component with excellent performance.

关 键 词：正己醇 三聚甲醛 聚甲氧基二己基醚 Aspen Plus软件 物理化学性能 

分 类 号：TQ2[化学工程—有机化工]