Activation method of titanium silicalite
    4.
    发明授权
    Activation method of titanium silicalite 有权
    钛硅沸石的活化方法

    公开(公告)号:US06288004B1

    公开(公告)日:2001-09-11

    申请号:US09305281

    申请日:1999-05-05

    IPC分类号: B01J2989

    摘要: A method is described for improving the catalytic performances of titanium silicalite having formula (I) by the activation of the catalyst (I) in an aqueous medium with hydrogen peroxide, in the presence of precursors of fluoride ions or anionic species containing fluorine. The activated catalyst (I) is particularly useful in oxidation processes with hydrogen peroxide of organic substrates and, in particular, in hydroxylation reactions of aromatic compounds, amoximation reactions of carbonyl compounds, epoxidation reactions of olefinic compounds and oxidation reactions of nitrogenated compounds.

    摘要翻译: 描述了一种通过在具有氟离子或含氟阴离子物质的前体的存在下,通过在具有过氧化氢的水性介质中活化催化剂(I)来改善式(I)的钛硅沸石的催化性能的方法。 活化的催化剂(I)特别适用于有机底物的过氧化氢的氧化过程,特别是芳族化合物的羟基化反应,羰基化合物的肟化反应,烯烃化合物的环氧化反应和含氮化合物的氧化反应。

    Silica/zeolite composite materials in spherical form and process for
their preparation
    5.
    发明授权
    Silica/zeolite composite materials in spherical form and process for their preparation 失效
    二氧化硅/沸石复合材料球形及其制备方法

    公开(公告)号:US5965476A

    公开(公告)日:1999-10-12

    申请号:US801593

    申请日:1997-02-14

    摘要: 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.

    摘要翻译: 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。

    Process for the oxidation of aromatic compounds to hydroxyaromatic
compounds
    7.
    发明授权
    Process for the oxidation of aromatic compounds to hydroxyaromatic compounds 有权
    芳香族化合物氧化成羟基芳族化合物的方法

    公开(公告)号:US6133487A

    公开(公告)日:2000-10-17

    申请号:US176316

    申请日:1998-10-22

    CPC分类号: C07C37/60 C07C41/26 Y02P20/52

    摘要: An improved process is described for the synthesis of hydroxylated aromatic compounds by means of the oxidation of an aromatic substrate with hydrogen, peroxide in an organic solvent, in the presence of synthetic zeolites, wherein the improvement consists in the fact that the organic solvent is selected from compounds having general formula (I) ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3 and R.sub.4, the same or different, represent a hydrogen atom or an alkyl group with from 1 to 4 carbon atoms or from compounds having general formula (II) ##STR2## wherein R and R', the same or different, represent an alkyl radical with from 1 to 4 carbon atoms.

    摘要翻译: 描述了通过在合成沸石存在下,通过在有机溶剂中用氢气,过氧化物氧化芳族底物来合成羟化芳族化合物的改进方法,其中改进在于选择有机溶剂 来自具有通式(I)的化合物,其中:R 1,R 2,R 3和R 4相同或不同,表示氢原子或具有1至4个碳原子的烷基或具有通式(II)的化合物,其中R和 R'相同或不同,表示具有1至4个碳原子的烷基。

    Process for preparing porous spherical silica xerogels
    8.
    发明授权
    Process for preparing porous spherical silica xerogels 失效
    制备多孔球形二氧化硅干凝胶的方法

    公开(公告)号:US6103209A

    公开(公告)日:2000-08-15

    申请号:US628978

    申请日:1996-04-08

    IPC分类号: C04B38/00 C01B33/16 C01B33/12

    CPC分类号: C01B33/163

    摘要: Process for preparing porous spherical silica particles substantially consisting in emulsifying an acidic silica sol in a dispersing media, gelifying the microdrops of the sol in the emulsified state and submitting the resulting gel to thermal treatment in the presence of the emulsifier liquid and of sol gelation base.

    摘要翻译: 制备多孔球状二氧化硅颗粒的方法,其基本上包括在分散介质中乳化酸性二氧化硅溶胶,使乳化状态下的溶胶的微滴凝胶化,并将所得凝胶在乳化剂液体和溶胶凝胶基质存在下进行热处理 。