The simplest zeolite,sodalite(SOD),was synthesized iononic liquid-thermally from aqueous basic aluminosilicate precursor gels in an imidazolium-based ionic liquid,with 1-ethyl-3-methylimidazolium bromide as solvent.Th...The simplest zeolite,sodalite(SOD),was synthesized iononic liquid-thermally from aqueous basic aluminosilicate precursor gels in an imidazolium-based ionic liquid,with 1-ethyl-3-methylimidazolium bromide as solvent.The synthesis was carried out at a temperature between 50 and 150 ℃ at an ambient pressure.The effects of mass ratios of aqueous gel to ionic liquid,molar ratios of n(Si)/n(Al) in gel and crystallization temperature and time on the crystallization were investigated.The morphology and structure of the as-prepared products were characterized by X-ray diffraction and scanning electron microscopy.The results show that a mixture of sodalite and zeolite X was initially precipitated in ionic liquid at a ratio 1∶3 of aqueous gel to ionic liquid,and finally transformed in to pure sodalite as the crystallisation time is prolonged,and the crystallinity of sodalite increased with the increase of n(Si)/n(Al) from 1.1 to 10.Increasing the ratio of aqueous gel to ionic liquid,zeolite X was favorable to crystallize,and it became the only product under the hydrothermal condition.展开更多
AlPO-11 molecular sieve with AEL structure was ionothermally synthesized using ionic liquid solvent as medium. The effects of ionic liquid amount, synthesis time and temperature were investigated. The structure and ch...AlPO-11 molecular sieve with AEL structure was ionothermally synthesized using ionic liquid solvent as medium. The effects of ionic liquid amount, synthesis time and temperature were investigated. The structure and characteristics of molecular sieve samples were characterized by X-ray diffraction(XRD),scanning electron microscopy (SEM), thermo gravimetric analysis(TGA). The results indicate that AlPO-11 molecular sieve could be synthesized by 1-ethyl-3-methylimidazolium bromide ([Emim]Br) ionic liquid as both the solvent and template.展开更多
文摘The simplest zeolite,sodalite(SOD),was synthesized iononic liquid-thermally from aqueous basic aluminosilicate precursor gels in an imidazolium-based ionic liquid,with 1-ethyl-3-methylimidazolium bromide as solvent.The synthesis was carried out at a temperature between 50 and 150 ℃ at an ambient pressure.The effects of mass ratios of aqueous gel to ionic liquid,molar ratios of n(Si)/n(Al) in gel and crystallization temperature and time on the crystallization were investigated.The morphology and structure of the as-prepared products were characterized by X-ray diffraction and scanning electron microscopy.The results show that a mixture of sodalite and zeolite X was initially precipitated in ionic liquid at a ratio 1∶3 of aqueous gel to ionic liquid,and finally transformed in to pure sodalite as the crystallisation time is prolonged,and the crystallinity of sodalite increased with the increase of n(Si)/n(Al) from 1.1 to 10.Increasing the ratio of aqueous gel to ionic liquid,zeolite X was favorable to crystallize,and it became the only product under the hydrothermal condition.
文摘AlPO-11 molecular sieve with AEL structure was ionothermally synthesized using ionic liquid solvent as medium. The effects of ionic liquid amount, synthesis time and temperature were investigated. The structure and characteristics of molecular sieve samples were characterized by X-ray diffraction(XRD),scanning electron microscopy (SEM), thermo gravimetric analysis(TGA). The results indicate that AlPO-11 molecular sieve could be synthesized by 1-ethyl-3-methylimidazolium bromide ([Emim]Br) ionic liquid as both the solvent and template.
