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首页> 外文期刊>Journal of porous materials >Preparation of an extra-large pore titanosilicate with 14×12-ring channels and its catalytic performance in epoxidation
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Preparation of an extra-large pore titanosilicate with 14×12-ring channels and its catalytic performance in epoxidation

机译：用14×12环通道的超大孔隙硅酸盐制备及其在环氧化中的催化性能

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摘要

An interlayer expanded zeolite, IEZ-PLS-3(Si-O-Si), was post-synthesized by the simple interlayer silylation of layered ECNU-9(P), which was derived from a lamellar precursor (PLS-3) using dichlorotetramethyldisiloxane (DCTMS) as the silylation reagent. The IEZ-PLS-3(Si-O-Si) was composed of ferrierite sheets and an intersected 14 x 12-ring (R) extra-large pore system. The results revealed that the IEZ-PLS-3(Si-O-Si) was composed of nanosized crystals, indicating that it is favorable for catalysis. Ti active sites were introduced into the framework of the IEZ-PLS-3(Si-O-Si) by solid-phase stirring in H(2)TiF(6)aqueous solution at room temperature. The catalytic properties of the resulting material (Ti-IEZ-PLS-3(Si-O-Si)) were tested by carrying out the epoxidation of propene and allyl chloride, both of which have industrial application value. The Ti-IEZ-PLS-3(Si-O-Si) showed a higher catalytic activity compared to the typical well-known titanosilicate zeolites, including titanium silicalite-1 (TS-1) and Ti-MWW, which are currently used in industries. We also conducted the epoxidation of cyclohexene using bulk tert-butyl peroxide (TBHP) in decane as the oxidant to explore the pore properties of the Ti-IEZ-PLS-3(Si-O-Si). The Ti-IEZ-PLS-3(Si-O-Si) exhibited better catalytic performance than the TS-1 and Ti-MWW for cyclohexene due to its larger pore aperture.
机译：通过层状ECNU-9（P）的简单中间层甲硅烷基化，将晶状体甲硅烷基合成的层间膨胀的沸石IEZ-PLS-3（Si-O-Si），其使用二氯四甲基二硅氧烷衍生自拉米前体（PLS-3） （DCTMS）作为甲硅烷基化试剂。 IEZ-PLS-3（Si-O-Si）由硅铁矿板和相交14×12环（R）超大孔系统组成。结果表明，IEZ-PLS-3（Si-O-Si）由纳米晶体组成，表明它有利于催化。通过在室温下的H（2）TIF（6）水溶液中的固相搅拌将Ti活性位点引入IEZ-PLS-3（Si-O-Si）的框架中。通过进行丙烯和烯丙基氯的环氧化来测试所得材料的催化性质（Ti-IEZ-PLS-3（Si-Si）），其中两者都具有工业应用价值。与典型的众所周知的钛硅酸盐沸石相比，Ti-IEZ-PLS-3（Si-O-Si）显示出更高的催化活性，包括目前使用的钛硅酸盐-1（TS-1）和Ti-Mww。行业。我们还使用癸烷作为氧化剂的本体叔丁基过氧化物（TBHP）进行环己烯的环氧化，以探索Ti-Iez-PLS-3（Si-O-Si）的孔隙性质。 Ti-Iez-PLS-3（Si-O-Si）由于其较大的孔隙孔而言，具有比TS-1和Ti-Mww的催化性能更好。

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