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    • 5. 发明授权
    • Silica/zeolite composite materials in spherical form and process for
their preparation
    • 二氧化硅/沸石复合材料球形及其制备方法
    • US5965476A
    • 1999-10-12
    • US801593
    • 1997-02-14
    • Luigi BalducciRaffaele UngarelliCristina Tonini
    • Luigi BalducciRaffaele UngarelliCristina Tonini
    • B01J29/04B01J29/06B01J29/70B01J29/80B01J29/89C01B37/00C01B39/02C07C37/60B01J32/00
    • C07C37/60B01J29/80B01J29/89B01J29/7007Y02P20/52
    • The present invention relates to silica/zeolite composite materials in spherical form and the process for their preparation which occurs by the dispersion of submicronic particles of titanium silicalite, beta zeolite, or mixtures of beta zeolite with titanium silicalite, in a silica sol synthesized by acid hydrolysis of silicon alkoxides; the hybrid sol thus obtained, subjected to emulsification and gelation techniques in organic mediums, produces these materials in a spherical form with an average diameter of between 20 and 150 .mu.m and containing up to 70% by weight of titanium silicalite, beta zeolite or mixtures of titanium silicalite/beta zeolite.The materials of the invention, having a high mechanical resistance and characterized by a surface area of between 300 and 800 m.sup.2 /g, are applied as catalysts; in particular, those consisting of titanium silicalite or mixtures of titanium silicalite/beta zeolite are advantageously used in oxidation reactions of organic compounds with hydrogen peroxide.
    • 本发明涉及球形二氧化硅/沸石复合材料及其制备方法,其通过在硅酸钠溶液中分解而制得的二氧化硅/沸石复合材料,其通过将钛硅沸石,β沸石的亚微米级颗粒或β-沸石与钛硅沸石的混合物分散在由硅酸 硅烷醇盐的水解; 由此获得的在有机介质中进行乳化和凝胶化技术的混合溶胶将这些材料制成球形,平均直径为20至150μm,并含有至多70重量%的钛硅沸石,β沸石或混合物 的钛硅质岩/β沸石。 本发明的具有高机械性能并且表征面积在300-800m2 / g之间的材料被用作催化剂; 特别是由钛硅沸石或钛硅沸石/β沸石的混合物组成的有机化合物与过氧化氢的氧化反应有利地使用。