The inexpensive and moisture-stable Lewis-acidic ionic liquids were prepared and applied for transesterification of soybean oil to biodiesel.The influences of molar ratio of methanol to soybean oil,reaction temperatur...The inexpensive and moisture-stable Lewis-acidic ionic liquids were prepared and applied for transesterification of soybean oil to biodiesel.The influences of molar ratio of methanol to soybean oil,reaction temperature and amount of ionic liquids were investigated.The transesterification of soybean oil to biodiesel catalyzed by choline chloride·xZnCl2 ionic liquids showed many advantages such as mild conditions and lower cost.On the other hand,the non-ideal yield and complicated separation between biodiesel and soybean oil were also investigated and analyzed.The improvement on the systems of choline chloride·xZnCl2 was proposed for further investigation.展开更多
Novel soft materials, Eu（Ⅲ）-containing complex dissolved in [C8mim][X] （X=Cl-, PF-6 and Tf2N） ionic liquids, were synthesized. FT-IR and elementary analysis of complex proved that the molecular formula is [Csmim]...Novel soft materials, Eu（Ⅲ）-containing complex dissolved in [C8mim][X] （X=Cl-, PF-6 and Tf2N） ionic liquids, were synthesized. FT-IR and elementary analysis of complex proved that the molecular formula is [Csmim] [Eu（TTA）4]. The complex and ionic liquids had high thermal stability according to TGA. The photoluminescence spectra showed that the [Csmim][Eu（TTA）4] exhibited typical red emission de- riving from 5Do-7F2 transition. After dissolving the complex in [Csmim][X] （X=C1, PF6- and Tf2N-） ionic liquids, the luminescence intensity decreased in the following order： [Csmim][Tf2N]=[Csmim][PF6 ]〉[Csmim][C1]. This was because Tf2N- and PF6 anions had larger molecular volume and weaker coordination ability than Cl.展开更多
The extraction of Ce（Ⅳ） in H2SO4/H3PO4 system was investigated systematically using bifunctional ionic liquid extractants（Bif-ILES） [A336][P507],[A336][P204] and [A336][C272] in n-heptane.The effects of H2SO4 con...The extraction of Ce（Ⅳ） in H2SO4/H3PO4 system was investigated systematically using bifunctional ionic liquid extractants（Bif-ILES） [A336][P507],[A336][P204] and [A336][C272] in n-heptane.The effects of H2SO4 concentration,extractant concentration and salting-out agent concentration were observed in detail.The extraction mechanism of Ce（Ⅳ） in H2SO4/H3PO4 system was obtained.The comparison with other extractants such as Cyanex923,TBP was also studied.Thermodynamic functions of the extraction reaction were calculated,showing that the extraction was an exothermic process.The separation of Ce（Ⅳ） from RE（Ⅲ） and Th（Ⅳ） was also investigated.The result indicated that Ce（Ⅳ） could be selectively extracted in this system.CePO4 nanoparticles were obtained in the process of stripping using H2O2 in H2SO4/H3PO4 system.X-ray diffraction（XRD）,scanning electron microscopy（SEM） and spectroscopy were adopted for the characterization of the sample.展开更多
基金Supported by the National High Technology Research and Development Program of China(2007AA06Z202)the National Key Technology Research and Development Program of China(2006BAC02A10)the Distinguished Young Scholars Foundation of Jilin Province(20060114)
文摘The inexpensive and moisture-stable Lewis-acidic ionic liquids were prepared and applied for transesterification of soybean oil to biodiesel.The influences of molar ratio of methanol to soybean oil,reaction temperature and amount of ionic liquids were investigated.The transesterification of soybean oil to biodiesel catalyzed by choline chloride·xZnCl2 ionic liquids showed many advantages such as mild conditions and lower cost.On the other hand,the non-ideal yield and complicated separation between biodiesel and soybean oil were also investigated and analyzed.The improvement on the systems of choline chloride·xZnCl2 was proposed for further investigation.
基金supported by the National Key Technology R&D Program of China (2006BAC02A10)Scientific Research Foundation for the Returned Overseas Chinese Scholars+3 种基金Ministry of Education of Chinathe Open Project Program of Key Laboratory of Chemical LasersDalian Institute of Chemical PhysicsChinese Academy of Sciences
文摘Novel soft materials, Eu（Ⅲ）-containing complex dissolved in [C8mim][X] （X=Cl-, PF-6 and Tf2N） ionic liquids, were synthesized. FT-IR and elementary analysis of complex proved that the molecular formula is [Csmim] [Eu（TTA）4]. The complex and ionic liquids had high thermal stability according to TGA. The photoluminescence spectra showed that the [Csmim][Eu（TTA）4] exhibited typical red emission de- riving from 5Do-7F2 transition. After dissolving the complex in [Csmim][X] （X=C1, PF6- and Tf2N-） ionic liquids, the luminescence intensity decreased in the following order： [Csmim][Tf2N]=[Csmim][PF6 ]〉[Csmim][C1]. This was because Tf2N- and PF6 anions had larger molecular volume and weaker coordination ability than Cl.
基金supported by National Natural Science Foundation of China(51174184)the National Basic Research Program of China(2012CBA01202)+1 种基金the Key Research Program of the Chinese Academy of Sciences(KGZD-EW-201-1)the Cooperation Project between CAS and Jiangxi Province
文摘The extraction of Ce（Ⅳ） in H2SO4/H3PO4 system was investigated systematically using bifunctional ionic liquid extractants（Bif-ILES） [A336][P507],[A336][P204] and [A336][C272] in n-heptane.The effects of H2SO4 concentration,extractant concentration and salting-out agent concentration were observed in detail.The extraction mechanism of Ce（Ⅳ） in H2SO4/H3PO4 system was obtained.The comparison with other extractants such as Cyanex923,TBP was also studied.Thermodynamic functions of the extraction reaction were calculated,showing that the extraction was an exothermic process.The separation of Ce（Ⅳ） from RE（Ⅲ） and Th（Ⅳ） was also investigated.The result indicated that Ce（Ⅳ） could be selectively extracted in this system.CePO4 nanoparticles were obtained in the process of stripping using H2O2 in H2SO4/H3PO4 system.X-ray diffraction（XRD）,scanning electron microscopy（SEM） and spectroscopy were adopted for the characterization of the sample.
