Liquid phase process for C8 alkylaromatic isomerization
    9.
    发明授权
    Liquid phase process for C8 alkylaromatic isomerization 失效
    C8烷基芳族异构化的液相方法

    公开(公告)号:US06872866B1

    公开(公告)日:2005-03-29

    申请号:US10736312

    申请日:2003-12-15

    IPC分类号: B01J29/06 C07C5/22 C07C5/27

    摘要: A liquid or partially liquid phase process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene uses a zeolitic catalyst system preferably based on zeolite beta and on pentasil-type zeolite. The invention obtains an improved yield of para-xylene from the mixture relative to prior art processes in a more economical manner. A preferred beta zeolite is a surface-modified zeolite beta resulting from acid washing of a templated native zeolite at conditions insufficient to effect bulk dealumination. A preferred pentasil zeolite is a MTW-type with a silica-to-alumnina ratio between 20 and 45.

    摘要翻译: 用于使二甲苯和乙苯的非平衡混合物异构化的液体或部分液相方法使用优选基于β沸石和pentasil型沸石的沸石催化剂体系。 相对于现有技术方法,本发明以更经济的方式获得了来自混合物的对二甲苯的提高的产率。 优选的β沸石是在不足以影响大部分脱铝的条件下由模板天然沸石酸洗而得到的表面改性沸石β。 优选的pentasil沸石是二氧化硅与校准比在20和45之间的MTW型。

    Oxidation of ketones to esters using a tin substituted zeolite beta
    10.
    发明授权
    Oxidation of ketones to esters using a tin substituted zeolite beta 有权
    使用锡取代沸石β将酮氧化成酯

    公开(公告)号:US06344583B1

    公开(公告)日:2002-02-05

    申请号:US09557302

    申请日:2000-04-25

    IPC分类号: C07C6902

    CPC分类号: C07D315/00 C07D309/30

    摘要: Applicants have developed a process for the oxidation of ketones to esters. The process involves contacting the ketone with hydrogen peroxide and a catalyst at oxidation conditions. The catalyst is a molecular sieve represented by the empirical formula: (MwSnxTiySi1−x−y−zGez)O2 where M is a trivalent metal such as aluminum or boron. These molecular sieves have a microporous three dimensional framework structure of at least SiO2 and SnO2 tetrahedral units, a crystallographically regular pore system and the characteristic x-ray diffraction pattern of zeolite beta.

    摘要翻译: 申请人已经开发了将酮氧化成酯的方法。 该方法包括在氧化条件下使酮与过氧化氢和催化剂接触。 催化剂是由经验式表示的分子筛:其中M是三价金属如铝或硼。 这些分子筛具有至少SiO 2和SnO 2四面体单元的微孔三维骨架结构,晶体学规则孔系统和β沸石的特征X射线衍射图。