Enhanced crystal acidity exchange method
    8.
    发明授权
    Enhanced crystal acidity exchange method 失效
    增强晶体酸度交换方法

    公开(公告)号:US07553790B2

    公开(公告)日:2009-06-30

    申请号:US11258440

    申请日:2005-10-25

    IPC分类号: B01J29/06

    CPC分类号: B01J29/40 B01J2229/42

    摘要: The present invention describes a method to increase the activity of a catalyst by first performing an ion exchange step with a potassium ion, followed by performing an ion-exchange step with an ammonium ion. Specifically, the present invention describes a method to increase the acidity of a zeolite by incorporating a potassium salt ion-exchange prior to an ammonium salt ion-exchange step. Even more specifically, the present invention is drawn to a method of increasing the activity of a zeolite by employing more than one potassium ion exchanges followed by at least one ammonium ion exchange. The present invention also describes a method to reduce the amount of sodium normally found in commercially produced zeolite by employing any of these methods. The present invention is also drawn to the catalysts produced by any of these methods.

    摘要翻译: 本发明描述了通过首先用钾离子进行离子交换步骤,然后用铵离子进行离子交换步骤来提高催化剂活性的方法。 具体地,本发明描述了通过在铵盐离子交换步骤之前引入钾盐离子交换来提高沸石的酸度的方法。 更具体地说,本发明涉及通过使用多于一种的钾离子交换,然后进行至少一种铵离子交换来提高沸石的活性的方法。 本发明还描述了一种通过使用任何这些方法来减少通常在商业生产的沸石中发现的钠的量的方法。 本发明还涉及通过任何这些方法制备的催化剂。

    Synthesis crystalline molecular sieves
    10.
    发明申请
    Synthesis crystalline molecular sieves 审中-公开
    合成结晶分子筛

    公开(公告)号:US20080253959A1

    公开(公告)日:2008-10-16

    申请号:US11731870

    申请日:2007-03-30

    IPC分类号: C01B33/20 C01B39/00

    CPC分类号: C01B37/00 C01B39/00

    摘要: In a process for synthesizing a crystalline molecular sieve, an aqueous synthesis mixture is produced capable of forming the crystalline molecular sieve. Crystallization of the synthesis mixture is induced so as to form crystals of said molecular sieve in the synthesis mixture and, when crystallization is complete, the molecular sieve crystals are allowed or caused to separate from the remainder of the synthesis mixture to produce a solid phase comprising said molecular sieve crystals and a supernatant liquid phase. The supernatant liquid phase is then decanted from the solid phase to recover the molecular sieve crystals and the crystals are dried without initially being subjected to washing or filtration.

    摘要翻译: 在合成结晶分子筛的方法中,制备能够形成结晶分子筛的水性合成混合物。 诱导合成混合物的结晶,以便在合成混合物中形成所述分子筛的晶体,并且当结晶完成时,使分子筛结晶与合成混合物的其余部分分离以产生包含 所述分子筛晶体和上清液相。 然后从固相中倾析出上清液相,回收分子筛晶体,并将晶体干燥,最初不进行洗涤或过滤。