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    LOW-TEMPERATURE SYNTHESIS OF HIGH-PURITY AFX ZEOLITE
    1.
    发明申请
    LOW-TEMPERATURE SYNTHESIS OF HIGH-PURITY AFX ZEOLITE 有权

    公开(公告)号：US20220332595A1

    公开(公告)日：2022-10-20

    申请号：US17764224

    申请日：2020-09-18

    Applicant: IFP Energies nouvelles

    Inventor： Bogdan HARBUZARU ,  David BERTHOUT ,  Eric LLIDO ,  Laetitia JOTHIE ,  Raquel MARTINEZ FRANCO

    IPC: C01B39/48

    Abstract: The invention relates to a process for synthesizing a high-purity AFX zeolite, comprising at least the following steps:
    i) mixing, in an aqueous medium, of at least one source of silicon (Si) in SiO2 oxide form, at least one source of aluminum (Al) in Al2O3 oxide form, a nitrogenous organic compound of 1,6-bis(methylpiperidinium)hexane dihydroxide type, and at least one source of at least one alkali metal chosen from lithium, potassium or sodium, and the mixture of at least two of these metals, until a homogeneous precursor gel is obtained; ii) hydrothermal treatment of said precursor gel obtained at the end of step i) at a temperature of between 75° C. and 95° C., limits included, for a period of between 40 and 100 hours, limits included, to obtain a solid AFX-structure crystalline phase, termed “AFX zeolite”. The invention also relates to the high-purity AFX zeolite obtained.

    METHOD FOR FAST SYNTHESIS OF AN AFX-STRUCTURE ZEOLITE WITH A FAUJASITE SOURCE
    3.
    发明申请
    METHOD FOR FAST SYNTHESIS OF AN AFX-STRUCTURE ZEOLITE WITH A FAUJASITE SOURCE 有权

    公开(公告)号：US20220194805A1

    公开(公告)日：2022-06-23

    申请号：US17604238

    申请日：2020-04-14

    Applicant: IFP Energies nouvelles

    Inventor： Raquel MARTINEZ FRANCO ,  Bogdan HARBUZARU ,  Eric LLIDO ,  David BERTHOUT

    IPC: C01B39/48

    Abstract: The present invention relates to a process for the rapid synthesis of an AFX-structure zeolite comprising at least: i) mixing, in an aqueous medium, a FAU-structure zeolite having an SiO2 (FAU)/Al2O3 (FAU) molar ratio of between 2.00 and 100, a nitrogen-containing organic compound R, at least one source of at least one alkali and/or alkaline-earth metal M of valence n, with the following molar composition: (SiO2 (FAU))/(Al2O3 (FAU)) between 2.00 and 100, H2O/(SiO2 (FAU)) between 1 and 100, R/(SiO2 (FAU)) between 0.01 and 0.6, M2/nO/(SiO2(FAU)) between 0.005 and 0.45, wherein SiO2 (FAU) denotes the amount of SiO2 provided by the FAU zeolite and Al2O3(FAU) denotes the amount of Al2O3 provided by the FAU zeolite, until a homogeneous precursor gel is obtained; ii) hydrothermally treating said precursor gel obtained at the end of step i) under autogenous pressure at a temperature of between 120° C. and 250° C., for 4 to 12 hours.

    LOW-TEMPERATURE SYNTHESIS OF CATALYST BASED ON ZEOLITE AFX AND APPLICATION THEREOF IN NH3-SCR
    6.
    发明申请
    LOW-TEMPERATURE SYNTHESIS OF CATALYST BASED ON ZEOLITE AFX AND APPLICATION THEREOF IN NH3-SCR 有权

    公开(公告)号：US20220339612A1

    公开(公告)日：2022-10-27

    申请号：US17764264

    申请日：2020-09-18

    Applicant: IFP Energies nouvelles

    Inventor： Bogdan HARBUZARU ,  David BERTHOUT ,  Eric LLIDO ,  Laetitia JOTHIE

    IPC: B01J29/70 ,  F01N3/20 ,  B01J37/04 ,  B01J37/08 ,  B01J37/02

    Abstract: The invention relates to a process for preparing a catalyst based on an AFX zeolite exchanged with at least one transition metal, comprising at least the following steps:
    i) mixing, in an aqueous medium, of at least one source of silicon (Si) in SiO2 oxide form, at least one source of aluminum (Al) in Al2O3 oxide form, 1,6-bis(methylpiperidinium)hexane dihydroxide, and at least one source of at least one alkali metal, until a homogeneous precursor gel is obtained; ii) hydrothermal treatment at a temperature between 75° C. and 95° C., limits included; iii) at least one ion exchange with a solution comprising at least one species capable of releasing a transition metal, iv) heat treatment by drying followed by at least one calcination under a stream of air at a temperature between 400 and 700° C. The invention also relates to the catalyst obtained and to the use thereof for the selective reduction of NOx.

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