【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。更多还原

【Abstract】 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.更多还原