Invention Grant
- Patent Title: Method for preparing a high-purity AFX structural zeolite with a nitrogen-containing organic structuring agent
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Application No.: US17057408Application Date: 2019-05-16
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Publication No.: US11643332B2Publication Date: 2023-05-09
- Inventor: Raquel Martinez Franco , Eric Llido , David Berthout , Bogdan Harbuzaru
- Applicant: IFP Energies nouvelles
- Applicant Address: FR Rueil-Malmaison
- Assignee: IFP Energies nouvelles
- Current Assignee: IFP Energies nouvelles
- Current Assignee Address: FR Rueil-Malmaison
- Agency: Fitch, Even, Tabin & Flannery, LLP
- Priority: FR 54.383 2018.05.24
- International Application: PCT/EP2019/062556 2019.05.16
- International Announcement: WO2019/224084A 2019.11.28
- Date entered country: 2020-11-20
- Main IPC: C01B39/48
- IPC: C01B39/48 ; B01J29/70 ; B01J37/04 ; B01J37/10 ; B01J37/00 ; B01J37/06 ; B01J20/18 ; B01J20/30
Abstract:
The invention relates to a process for preparing an AFX-structure zeolite comprising at least the following steps:
i) mixing, in an aqueous medium, an FAU-structure zeolite having an SiO2 (FAU)/Al2O3 (FAU) molar ratio of between 2.00 (limit included) and 6.00 (limit excluded), an organic nitrogenous compound R, at least one source of at least one alkali and/or alkaline-earth metal M, the reaction mixture having the following molar composition: (SiO2 (FAU))/(Al2O3 (FAU)) between 2.00 (limit included) and 6.00 (limit excluded), H2O/(SiO2 (FAU)) between 1 and 100, R/(SiO2 (FAU)) between 0.01 and 0.6, M2/nO/(SiO2 (FAU)) between 0.005 and 0.7, limits included, until a homogeneous precursor gel is obtained;
ii) hydrothermal treatment of said precursor gel obtained on conclusion of step i) at a temperature of between 120° C. and 220° C., for a time of between 12 hours and 15 days.
i) mixing, in an aqueous medium, an FAU-structure zeolite having an SiO2 (FAU)/Al2O3 (FAU) molar ratio of between 2.00 (limit included) and 6.00 (limit excluded), an organic nitrogenous compound R, at least one source of at least one alkali and/or alkaline-earth metal M, the reaction mixture having the following molar composition: (SiO2 (FAU))/(Al2O3 (FAU)) between 2.00 (limit included) and 6.00 (limit excluded), H2O/(SiO2 (FAU)) between 1 and 100, R/(SiO2 (FAU)) between 0.01 and 0.6, M2/nO/(SiO2 (FAU)) between 0.005 and 0.7, limits included, until a homogeneous precursor gel is obtained;
ii) hydrothermal treatment of said precursor gel obtained on conclusion of step i) at a temperature of between 120° C. and 220° C., for a time of between 12 hours and 15 days.
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