作　　者： ; ;

机构地区： 华东理工大学化学与分子工程学院工业催化研究所

出　　处： 《华东理工大学学报（自然科学版）》 1997年第2期249-253,共5页

摘　　要： 以钛酸正丁酯（ＴＢＯＴ）为钛源，正硅酸乙酯（ＴＥＯＳ）为硅源，在４４３Ｋ用四丙基溴化铵（ＴＰＡＢｒ）和四乙基氢氧化铵（ＴＥＡＯＨ）的混合物为模板剂，合成了Ｔｉ－Ｓｉ分子筛。经ＸＲＤ、ＦＴ－ＩＲ、ＳＥＭ以及ＢＥＴ比表面积分析，证实了在以ＴＰＡＢｒ＋ＴＥＡＯＨ为模板剂合成的样品中钛已进入ｓｉｌｉｃａｌｉｔｅ－１的骨架，而以ＴＰＡＢｒ＋二乙胺或三甲胺为模板剂则合成不出Ｔｉ－Ｓｉ分子筛。ＳＥＭ的结果表明用氨水和ＴＥＡＯＨ调节反应液的碱度，对晶体的生长和形貌的影响各不相同，用ＴＥＡＯＨ时，合成样品的晶粒较大。还就ＴＥＡＯＨ、二乙胺、三甲胺引入的不同作用进行了讨论。 Using the mixture templeting reagent, tetrabutyl titanate as titanium source, tetraethyl orthosilicate as silicon source, the synthesis of Ti Si zeolite was studied. TS 1 zeolite was prepared using the mixture of tetrapropyl ammonium bromide (TPABr) and tetraethyl ammonium hydroxide (TEAOH) as a templating reagent at 443K. XRD, IR and SEM were employed to characterize the synthesize samples. The surface area of samples was measured by BET. These studies indicated that the Ti 4+ entered the framework of silicalite 1 in the samples using the templating reagent of TPABr and TEAOH. But the crystal of TS 1 zeolite could not be obtained using TPABr + diethyl amine (DEA) or TPABr + trimethyl amine (TMA) as a templating reagent. The results of SEM also showed that the size of the crystal prepared with the mixture templating reagent was more irregular and larger than that with TPAOH. The influence of adding NH 4OH to adjust the pH of the solution synthesizing zeolite on the growth and topology of crystal is different with the situation of adding TEAOH. The function of organic bases (TEAOH, TEA and DMA) in the synthesis gel was also discussed.

关 键 词： 分子筛 合成 四丙基溴化铵 钛硅分子筛 模板剂

领　　域： [化学工程] [理学] [理学]