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74 条记录 (耗时 0.031 秒)

    Performance enhancement of zeolite catalysts with water cofeed
    14.
    发明授权
    Performance enhancement of zeolite catalysts with water cofeed 失效
    沸石催化剂与水共混物性能的提高

    公开(公告)号：US5773679A

    公开(公告)日：1998-06-30

    申请号：US578346

    申请日：1995-12-26

    申请人： Jeffrey S. Beck ,  David L. Stern

    发明人： Jeffrey S. Beck ,  David L. Stern

    IPC分类号： C07C6/12 ,  C07C5/52

    CPC分类号： C07C6/123 ,  B01J2229/12 ,  B01J2229/32 ,  C07C2529/40

    摘要： A process for shape-selective hydrocarbon conversion that involves initially contacting a feed stream which includes an alkylaromatic compound and a co-feed of water, under conversion conditions with a catalytic molecular sieve. Preferably, the catalytic molecular sieve has been modified by being ex situ selectivated with a silicon compound. After an effective amount of time, the water co-feed is omitted from the feed stream and the hydrocarbon conversion process is continued. Optionally, the catalytic molecular sieve can also be in situ trim-selectivated.

    摘要翻译： 一种用于形状选择性烃转化的方法，其包括在转化条件下与催化分子筛接触包括烷基芳族化合物和水的共同进料的进料流。 优选地，通过用硅化合物进行异地选择来改变催化分子筛。 在有效量的时间之后，从进料流中省去水共同进料，继续进行烃转化过程。 任选地，催化分子筛也可以原位修剪选择。

    Hydrothermally stable catalyst and its use in catalytic cracking
    18.
    发明授权
    Hydrothermally stable catalyst and its use in catalytic cracking 失效
    水热稳定催化剂及其在催化裂化中的应用

    公开(公告)号：US07615143B2

    公开(公告)日：2009-11-10

    申请号：US10903152

    申请日：2004-07-30

    申请人： Tan-Jen Chen ,  Paul F. Keusenkothen ,  J. Jason Wu ,  John Scott Buchanan ,  Guang Cao ,  Larry L. Iaccino ,  David L. Stern ,  Matthew J. Vincent

    发明人： Tan-Jen Chen ,  Paul F. Keusenkothen ,  J. Jason Wu ,  John Scott Buchanan ,  Guang Cao ,  Larry L. Iaccino ,  David L. Stern ,  Matthew J. Vincent

    IPC分类号： C10G11/05

    CPC分类号： C10G11/05 ,  C10G2400/20

    摘要： There is provided a catalyst composition having improved hydrothermal stability for the catalytic cracking of a hydrocarbon feedstock to selectively produce propylene. The catalyst composition comprises a first crystalline molecular sieve selected from the group consisting of IM-5, MWW, ITH, FER, MFS, AEL, and AFO and an effective amount of a stabilization metal (copper, zirconium, or mixtures thereof) exchanged into the molecular sieve. The catalyst finds application in the cracking of naphtha and heavy hydrocarbon feedstocks. When used in the catalytic cracking of heavier hydrocarbon feedstocks, the catalyst composition preferably comprises a second molecular sieve having a pore size that is greater than the pore size of the first molecular sieve. The process is carried out by contacting a feedstock containing hydrocarbons having at least 4 carbon atoms is contacted, under catalytic cracking conditions, with the catalyst composition.

    摘要翻译： 提供了一种具有改进的水热稳定性用于烃原料的催化裂化以选择性地生产丙烯的催化剂组合物。 催化剂组合物包含选自由IM-5，MWW，ITH，FER，MFS，AEL和AFO组成的组的第一结晶分子筛和有效量的稳定金属（铜，锆或其混合物）交换成 分子筛。 该催化剂可用于石脑油和重质烃原料的裂解。 当用于较重烃原料的催化裂化时，催化剂组合物优选包含具有大于第一分子筛孔径的孔径的第二分子筛。 该方法通过使含有至少4个碳原子的烃的原料在催化裂化条件下与催化剂组合物接触来进行。

    Enhanced crystal acidity exchange method
    19.
    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

    申请人： Jean W. Beeckman ,  Glenn R. Sweeten ,  Daria N. Lissy ,  David L. Stern ,  Stephen J. McCarthy ,  Dominick N. Mazzone ,  Christine N. Elia

    发明人： Jean W. Beeckman ,  Glenn R. Sweeten ,  Daria N. Lissy ,  David L. Stern ,  Stephen J. McCarthy ,  Dominick N. Mazzone ,  Christine N. Elia

    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。