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    Process to prepare propylene
    27.
    发明授权
    Process to prepare propylene 有权

    公开(公告)号：US11447432B2

    公开(公告)日：2022-09-20

    申请号：US16470321

    申请日：2017-12-19

    申请人： GASOLFIN B.V.

    发明人： Raymond Paul Fletcher

    IPC分类号： C07C4/06 ,  B01J29/70 ,  B01J29/76 ,  B01J37/04 ,  B01J37/08 ,  B01J37/30 ,  C07C5/27

    摘要： The invention is directed to a process to prepare propylene from a hydrocarbon feed comprising pentane by contacting the hydrocarbon feed with a heterogeneous cracking catalyst as present in one or more fixed beds thereby obtaining a cracked effluent. The heterogeneous catalyst comprises a matrix component and a molecular sieve comprising framework alumina, framework silica and a framework metal selected from the group of Zn, Fe, Ce, La, Y, Ga and/or Zr. Propylene is isolated from the cracked effluent.

    Process for preparing iron(III)-exchanged zeolite composition
    28.
    发明授权
    Process for preparing iron(III)-exchanged zeolite composition 有权

    公开(公告)号：US11439992B2

    公开(公告)日：2022-09-13

    申请号：US16899138

    申请日：2020-06-11

    申请人： BASF Corporation

    发明人： Qi Fu ,  Barbara Slawski ,  Peter Pfab

    IPC分类号： B01J29/72 ,  C01B39/02 ,  B01J29/76 ,  B01J29/072 ,  B01D53/94 ,  B01J35/04 ,  B01J37/02 ,  B01J29/14 ,  B01J37/30 ,  F01N3/10 ,  F01N3/20

    摘要： The present disclosure relates to processes for formation of a molecular sieve, particularly a metal-promoted molecular sieve, and more particularly an Iron(III) exchanged zeolite. Preferably, the zeolite is of the chabazite form or similar structure. The processes can include combining a zeolite with Iron(III) cations in an aqueous medium. The process can be carried out at a pH of less than about 7, and a buffering material can be used with the aqueous medium. The processes beneficially result in Iron exchange that can approach 100% along with removal of cations (such as sodium, NH4, and H) from the zeolite. An Iron(III)-exchanged zeolite prepared according to the disclosed processes can include about 2,000 ppm or less of cation and about 1% by weight or greater of Iron(III). The disclosure also provides catalysts (e.g., SCR catalysts) and exhaust treatment systems including the Iron(III)-exchanged zeolite.

    Multistage nanoreactor catalyst and preparation and application thereof
    29.
    发明授权
    Multistage nanoreactor catalyst and preparation and application thereof 有权

    公开(公告)号：US11427516B2

    公开(公告)日：2022-08-30

    申请号：US16952183

    申请日：2020-11-19

    申请人： Jiangnan University

    发明人： Xiaohao Liu ,  Yuebing Xu ,  Feng Jiang ,  Bing Liu ,  Dapeng Liu ,  Ting Wang

    IPC分类号： C07C1/04 ,  B01J35/00 ,  B01J37/02 ,  B01J37/06 ,  B01J21/08 ,  B01J23/78 ,  B01J21/04 ,  B01J29/064 ,  B01J37/03 ,  B01J37/00 ,  B01J37/08 ,  B01J37/30 ,  B01J23/889

    摘要： The present disclosure discloses a multistage nanoreactor catalyst and preparation and application thereof, belonging to the technical field of synthesis gas conversion. The catalyst consists of a core of an iron-based Fischer-Tropsch catalyst, a transition layer of a porous oxide or porous carbon material, and a shell layer of a molecular sieve having an aromatization function. The molecular sieve of the shell layer can be further modified by a metal element or a non-metal element, and the outer surface of the molecular sieve is further modified by a silicon-oxygen compound to adjust the acidic site on the outer surface and the aperture of the molecular sieve, thereby inhibiting the formation of heavy aromatic hydrocarbons. According to the disclosure, the shell layer molecular sieve with a transition layer and a shell layer containing or not containing auxiliaries, and with or without surface modification can be prepared by the iron-based Fischer-Tropsch catalyst through multiple steps. The catalyst can be used for direct preparation of aromatic compounds, especially light aromatic compounds, from synthesis gas; the selectivity of light aromatic hydrocarbons in hydrocarbons can be 75% or above, and the content in the liquid phase product is not less than 95%; and the catalyst has good stability and good industrial application prospect.