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.

Abstract: The invention describes a process for the photocatalytic reduction of carbon dioxide carried out in the liquid phase and/or in the gas phase under irradiation employing a photocatalyst of microporous crystalline metal sulfide type, said process being carried out by bringing a charge containing the CO2 and at least one sacrificial compound into contact with said photocatalyst, then by irradiating the photocatalyst by at least one irradiation source producing at least one wavelength lower than the bandgap width of said photocatalyst, so as to reduce the CO2 and to oxidize the sacrificial compound, so as to produce an effluent containing, at least in part, C1 or more carbon-based molecules other than CO2.

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.

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 6.00 and 200, limits included, 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 6.00 and 200, H2O/(SiO2 (FAU)) between 1.00 and 100, R/(SiO2 (FAU)) between 0.01 and 0.60, M2/nO/(SiO2 (FAU)) between 0.005 and 0.45, 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.

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.

Abstract: The invention relates to a process for preparing a synthetic IZM-2 zeolite, which consists in performing a hydrothermal treatment of an aqueous gel containing a source of silicon and a source of amorphous aluminium, two nitrogenous or structuring organic compounds including two quaternary ammonium functions, 1,6-bis(methylpiperidinium)hexane dihydroxide and 1,6-bis(methylpiperidinium)hexane dibromide, used as a mixture, in combination with a source of a specific alkali metal chloride M (preferably NaCl), the aqueous gel not comprising any source of at least one fluoride anion.

Abstract: The present invention relates to a crystallised solid, called IZM-5, comprising a chemical composition expressed on an anhydrous base, in terms of mole, and defined by the following general formula: SnaZnbS8: cR, wherein R represents at least one nitrogenous organic species; S sulphur, “a” is the molar amount of tin, denoted Sn, between 0.1 and 5; “b” is the molar amount of zinc, denoted Zn, between 0.2 and 8; “c” is the molar amount of the nitrogenous organic species R between 0 and 4.

Abstract: The invention describes a process for the photocatalytic reduction of carbon dioxide carried out in the liquid phase and/or in the gas phase under irradiation employing a photocatalyst of microporous crystalline metal sulfide type, said process being carried out by bringing a charge containing the CO2 and at least one sacrificial compound into contact with said photocatalyst, then by irradiating the photocatalyst by at least one irradiation source producing at least one wavelength lower than the bandgap width of said photocatalyst, so as to reduce the CO2 and to oxidize the sacrificial compound, so as to produce an effluent containing, at least in part, C1 or more carbon-based molecules other than CO2.

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.

Abstract: The present invention relates to a process for preparing a zeolite composite material composed of a mixture of AFX and BEA zeolites, comprising at least the following steps: i) mixing in aqueous medium, in particular proportions, of an FAU zeolite having an SiO2/Al2O3 mole ratio of between 30 and 100 and a parameter Pze such that: 3250<Pze<7200, with at least one zeolite of FAU structure type having an SiO2/Al2O3 mole ratio of between 2 and 30 (upper limit excluded), of at least one organonitrogen compound R, R being 1,5-bis(methylpiperidinium)pentane dihydroxide, 1,6-bis(methylpiperidinium)hexane dihydroxide and/or 1,7-bis(methylpiperidinium)heptane dihydroxide, of at least one source of at least one alkali metal and/or alkaline-earth metal M of valency n, to obtain a gel, ii) hydrothermal treatment of said gel obtained at a temperature of between 120° C. and 220° C., for a time of between 12 hours and 15 days.

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.

Abstract: The present invention relates to a process for preparing a zeolite composite material composed of a mixture of AFX and BEA zeolites, comprising at least the following steps: i) mixing in aqueous medium, in particular proportions, of an FAU zeolite having an SiO2/Al2O3 mole ratio of between 30 and 100 and a parameter Pze such that: 3250<Pze<7200, with at least one zeolite of FAU structure type having an SiO2/Al2O3 mole ratio of between 2 and 30 (upper limit excluded), of at least one organonitrogen compound R, R being 1,5-bis(methylpiperidinium)pentane dihydroxide, 1,6-bis(methylpiperidinium)hexane dihydroxide and/or 1,7-bis(methylpiperidinium)heptane dihydroxide, of at least one source of at least one alkali metal and/or alkaline-earth metal M of valency n, to obtain a gel, ii) hydrothermal treatment of said gel obtained at a temperature of between 120° C. and 220° C., for a time of between 12 hours and 15 days.

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 6.00 and 200, limits included, 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 6.00 and 200, H2O/(SiO2 (FAU)) between 1.00 and 100, R/(SiO2(FAU)) between 0.01 and 0.60, M2/nO/(SiO2(FAU)) between 0.005 and 0.45, 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.

Abstract: The invention relates to a process for preparing a synthetic IZM-2 zeolite, which consists in performing a hydrothermal treatment of an aqueous gel containing a source of silicon and a source of amorphous aluminium, two nitrogenous or structuring organic compounds including two quaternary ammonium functions, 1,6-bis(methylpiperidinium)hexane dihydroxide and 1,6-bis(methylpiperidinium)hexane dibromide, used as a mixture, in combination with a source of a specific alkali metal chloride M (preferably NaCl), the aqueous gel not comprising any source of at least one fluoride anion.

Abstract: The invention relates to a process for preparing an IZM-2 zeolite, comprising at least: i) mixing, in aqueous medium, of at least one source of at least one tetravalent element X (XO2), at least one source of at least one trivalent element (Y2O3), 1,6-bis(methylpiperidinium)hexane dihydroxide, at least one source of at least one alkali metal M of valency n chosen from alkali metal chlorides, n being an integer greater than or equal to 1, M being chosen from lithium, potassium, sodium and caesium, and the mixture of at least two of these metals, and optionally in the presence of a source of at least one fluoride anion, BF, the mixture having a specific molar composition to obtain a homogeneous precursor gel; ii) hydrothermal treatment of said precursor gel.

Abstract: The invention relates to a process for preparing an IZM-2 zeolite, comprising at least: i) mixing, in aqueous medium, of at least one source of at least one tetravalent element X (XO2), at least one source of at least one trivalent element (Y2O3), 1,6-bis(methylpiperidinium)hexane dihydroxide, at least one source of at least one alkali metal M of valency n chosen from alkali metal chlorides, n being an integer greater than or equal to 1, M being chosen from lithium, potassium, sodium and caesium, and the mixture of at least two of these metals, and optionally in the presence of a source of at least one fluoride anion, BF, the mixture having a specific molar composition to obtain a homogeneous precursor gel; ii) hydrothermal treatment of said precursor gel.

Abstract: A novel process is described for the preparation of a microporous crystalline solid, known as IZM-2 microporous solid or IZM-2 zeolite. This novel process consists of carrying out the synthesis of IZM-2 zeolite by conversion/transformation of a zeolite with structure type FAU under hydrothermal conditions. In particular, said novel process consists of carrying out the synthesis of an IZM-2 zeolite starting from a zeolite with structure type FAU used as the source of silicon and aluminium and a specific organic molecule or template comprising two quaternary ammonium functions, namely 1,6-bis(methylpiperidinium)hexane dibromide.

Abstract: A novel process is described for the preparation of a microporous crystalline solid, known as IZM-2 microporous solid or IZM-2 zeolite. This novel process consists of carrying out the synthesis of IZM-2 zeolite by conversion/transformation of a zeolite with structure type FAU in a fluorinated medium under hydrothermal conditions. In particular, said novel process consists of carrying out the synthesis of an IZM-2 zeolite in a fluorinated medium starting from a zeolite with structure type FAU used as the source of silicon and aluminium and a specific organic molecule or template comprising two quaternary ammonium functions, namely 1,6-bis(methylpiperidinium)hexane dihydroxide.

Abstract: A novel process is described for the preparation of a microporous crystalline solid, known as IZM-2 microporous solid or IZM-2 zeolite. This novel process consists of carrying out the synthesis of IZM-2 zeolite by conversion/transformation of a zeolite with structure type FAU in a fluorinated medium under hydrothermal conditions. In particular, said novel process consists of carrying out the synthesis of an IZM-2 zeolite in a fluorinated medium starting from a zeolite with structure type FAU used as the source of silicon and aluminium and a specific organic molecule or template comprising two quaternary ammonium functions, namely 1,6-bis(methylpiperidinium)hexane dihydroxide.

Abstract: A novel process is described for the preparation of a microporous crystalline solid, known as IZM-2 microporous solid or IZM-2 zeolite. This novel process consists of carrying out the synthesis of IZM-2 zeolite by conversion/transformation of a zeolite with structure type FAU under hydrothermal conditions. In particular, said novel process consists of carrying out the synthesis of an IZM-2 zeolite starting from a zeolite with structure type FAU used as the source of silicon and aluminium and a specific organic molecule or template comprising two quaternary ammonium functions, namely 1,6-bis(methylpiperidinium)hexane dibromide.