介绍了一种新的离子液体合成法——水浴微波法,以乙醇胺、二乙醇胺、三乙醇胺和N,N-二甲基乙醇胺为阳离子,甲酸、乙酸和乳酸为阴离子,合成一系列醇胺类离子液体。以乙醇胺乳酸盐离子液体为例,通过正交实验(L9(34))分析,得到最佳合成条件为:合成时间30 min,温度65 ℃,微波功率300 W,乙醇胺与乳酸的摩尔比1︰1.1。在此条件下,除N,N-二甲基乙醇胺类离子液体外,其余8种离子液体产率均保持90 %以上。乙醇胺乳酸盐对SO2具有较高的吸收容量,吸收的SO2与乙醇胺乳酸盐的摩尔比为1.063,选其作为最佳吸收剂进行脱硫性能研究。研究发现,适宜吸收温度为25 ℃,解吸温度和解吸时间分别为90 ℃和60 min。实验同时表明,水浴微波法可以加速SO2的解吸过程。
以N ,N′-亚甲基双丙烯酰胺为交联剂 ,过硫酸钾为引发剂 ,采用溶液聚合法合成了丙烯酸 -丙烯酰胺二元共聚高吸水性树脂 .研究了单体组成、单体浓度、引发剂用量、交联剂用量、反应温度等因素对产物性能的影响 .并对反应动力学和共聚物的溶涨动力学进行了探讨
Ammonium aluminum sulfate hydroxide[NH4Al(SO4)2·12H2O], the precursor of Al2O3, was prepared with the method of sintering, leaching and adjusting the pH value by using fly ash and ammonium sulfate as raw materials.High-purity alumina was prepared by calcining NH4Al(SO4)2·12H2O.The effects of the temperature and time of sintering, molar ratio of(NH4)2SO4 vs the Al2O3 in fly ash and the grain size of fly ash on the extraction efficiency of Al2O3 from fly ash were studied.The efficiency of Al2O3 extraction could reach 95.6 percent under the optimum conditions.The purity of the Al2O3 from calcining NH4Al(SO4)2·12H2O that was refined by recrystallization was higher than 99.9 percent.