Process for the preparation of doped pentasil-type zeolites using a doped reactant
    2.
    发明授权
    Process for the preparation of doped pentasil-type zeolites using a doped reactant 有权
    使用掺杂的反应物制备掺杂的pentasil型沸石的方法

    公开(公告)号:US06969692B2

    公开(公告)日:2005-11-29

    申请号:US10647632

    申请日:2003-08-25

    摘要: A process for the preparation of a metal-doped pentasil-type zeolite comprising the steps of: a) preparing an aqueous precursor mixture comprising a silicon source and an aluminum source, at least one of these sources being doped with a rare earth metal or a transition metal of Groups Vb–VIIIb, Ib, or IIb of the Periodic System, and b) thermally treating the precursor mixture to form a metal-doped pentasil-type zeolite. With this process, metal-doped pentasil-type zeolites can be prepared while the risk of precipitation of the dopant as a separate phase is minimized.

    摘要翻译: 一种制备金属掺杂的pentasil型沸石的方法,包括以下步骤:a)制备包含硅源和铝源的水性前体混合物,这些源中的至少一个掺杂有稀土金属或 元素周期系Vb-VIIIb族,Ib族或IIb族的过渡金属,和b)热处理前体混合物以形成金属掺杂的pentasil型沸石。 通过该方法,可以制备金属掺杂的pentasil型沸石,同时使作为分离相的掺杂剂的沉淀的风险最小化。

    Process for the preparation of doped pentasil-type zeolite using doped seeds
    7.
    发明授权
    Process for the preparation of doped pentasil-type zeolite using doped seeds 有权
    使用掺杂种子制备掺杂的pentasil型沸石的方法

    公开(公告)号:US06964934B2

    公开(公告)日:2005-11-15

    申请号:US10647854

    申请日:2003-08-25

    摘要: The present invention relates to a process for the preparation of doped pentasil-type zeolite, which process comprises the steps of: a) preparing an aqueous precursor mixture from a silicon source, an aluminium source, and doped non-zeolitic seeds; and b) thermally treating the precursor mixture to form a doped pentasil-type zeolite. The term “non-zeolitic seeds” includes seeds made from materials selected from the group consisting of (i) X-ray amorphous materials, (ii) milled crystalline materials, such as milled zeolites, that have a relative crystallinity of not more than 75%, and (iii) crystalline materials other than zeolites, such as clays (e,g, bentonite and kaolin) and (low) crystalline aluminas.

    摘要翻译: 本发明涉及一种制备掺杂的pentasil型沸石的方法,该方法包括以下步骤:a)从硅源,铝源和掺杂的非沸石种子制备水性前体混合物; 和b)热处理前体混合物以形成掺杂的pentasil型沸石。 术语“非沸石种子”包括由选自以下的材料制成的种子:(i)X射线无定形材料,(ii)研磨的结晶材料,例如研磨的沸石,其相对结晶度不大于75 %,和(iii)沸石以外的结晶材料,例如粘土(e,g,膨润土和高岭土)和(低)结晶氧化铝。