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    PROCESS FOR PREPARING IRON(III)-EXCHANGED ZEOLITE COMPOSITION
    11.
    发明申请
    PROCESS FOR PREPARING IRON(III)-EXCHANGED ZEOLITE COMPOSITION 审中-公开

    公开(公告)号：US20200298217A1

    公开(公告)日：2020-09-24

    申请号：US16899138

    申请日：2020-06-11

    Applicant: BASF Corporation

    Inventor： Qi Fu ,  Barbara Slawski ,  Peter Pfab

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

    Abstract: 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.

    Molecular Sieve Catalyst Compositions, Catalytic Composites, Systems, And Methods
    14.
    发明申请
    Molecular Sieve Catalyst Compositions, Catalytic Composites, Systems, And Methods 审中-公开
    分子筛催化剂组合物，催化复合材料，系统和方法

    公开(公告)号：US20150367337A1

    公开(公告)日：2015-12-24

    申请号：US14741756

    申请日：2015-06-17

    Applicant: BASF Corporation

    Inventor： Xiaofan Yang ,  John K. Hochmuth ,  Wen-Mei Xue ,  Xiaoming Wang ,  Matthew Tyler Caudle ,  Ahmad Moini ,  Dustin O. Hollobaugh ,  Qi Fu ,  Michael Breen

    IPC: B01J29/76 ,  B01D53/94 ,  B01J35/04 ,  B01J29/72

    Abstract: Described is a selective catalytic reduction catalyst comprising a zeolitic framework material of silicon and aluminum atoms, wherein a fraction of the silicon atoms are isomorphously substituted with a tetravalent metal. The catalyst can include a promoter metal such that the catalyst effectively promotes the reaction of ammonia with nitrogen oxides to form nitrogen and H2O selectively over a temperature range of 150 to 650° C. In another aspect, described is a selective catalytic reduction composite comprising an SCR catalyst material and an ammonia storage material comprising a transition metal having an oxidation state of IV. The SCR catalyst material promotes the reaction of ammonia with nitrogen oxides to form nitrogen and H2O selectively over a temperature range of 150° C. to 600° C., and the SCR catalyst material is effective to store ammonia at temperatures of 400° C. and above. A method for selectively reducing nitrogen oxides, and a method for simultaneously selectively reducing nitrogen oxide and storing ammonia are also described. Additionally, an exhaust gas treatment system is also described.

    Abstract translation: 描述了包含硅和铝原子的沸石骨架材料的选择性催化还原催化剂，其中一部分硅原子被四价金属同晶取代。 催化剂可以包括促进剂金属，使得催化剂有效地促进氨与氮氧化物的反应，以在150至650℃的温度范围内选择性地形成氮和H 2。另一方面，描述了选择性催化还原复合材料，其包含 SCR催化剂材料和包含具有IV氧化态的过渡金属的氨储存材料。 SCR催化剂材料促进氨与氮氧化物的反应，在150℃至600℃的温度范围内选择性地形成氮和H2O，SCR催化剂材料在400℃的温度下有效储存氨。 以上。 还描述了选择性还原氮氧化物的方法，以及同时选择性地还原氮氧化物和储存氨的方法。 此外，还描述了废气处理系统。

    Process for preparing iron(III)-exchanged zeolite composition
    15.
    发明授权
    Process for preparing iron(III)-exchanged zeolite composition 有权

    公开(公告)号：US10710059B2

    公开(公告)日：2020-07-14

    申请号：US16062364

    申请日：2016-12-20

    Applicant: BASF Corporation

    Inventor： Qi Fu ,  Barbara Slawski ,  Peter Pfab

    IPC: B01J29/06 ,  B01J29/72 ,  C01B39/02 ,  B01J29/76 ,  B01J29/072 ,  B01D53/94 ,  B01J35/04 ,  B01J37/02 ,  B01J29/14 ,  B01J37/30 ,  F01N3/10 ,  F01N3/20

    Abstract: 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.

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