Process for the synthesis of IZM-2 zeolite in the presence of a template, 1,6-bis(methylpiperidinium)hexane dihydroxide

A process for preparing an IZM-2 zeolite, comprising at least the following steps:

• i) mixing, in an aqueous medium,
• at least one zeolite with structure type FAU having a molar ratio SiO2(fau)/Al2O3 (fau) of greater than or equal to 30,
• at least one nitrogen-containing organic compound R, R being 1,6-bis(methylpiperidinium)hexane dihydroxide, and
• at least one source of at least one fluoride anion,
• optionally at least one additional source of an oxide XO2, wherein the molar ratio XO2/SiO2(fau) is in the range of 0 to 4,
• the mixture having the following molar composition:
• (XO2 + SiO2 (fau))/Al2O3 (fau)
• in the range 30 to 600,
• H2O/(XO2 + SiO2 (fau))
• in the range 1 to 100,
• R/(XO2 + SiO2 (fau))
• in the range 0.01 to 0.6, and
• BF/(XO2 + SiO2 (fau))
• in the range 0.005 to 0.75,
• in which
• X is one or more tetravalent element(s) selected from the group consisting of the following elements:
• silicon, germanium, and titanium,
• SiO2(fau) being the quantity of SiO2 supplied by the FAU zeolite,
• Al2O3 (fau) being the quantity of Al2O3 supplied by the FAU zeolite, and
• BF is a fluorine salt, in which B is a cation selected from the cations NH4+, Na+, K+ and Li+, or is hydrofluoric acid in an aqueous solution, and
• ii) hydrothermal treatment of said mixture obtained from step i) at a temperature in the range of 120° C. to 200° C. for a period in the range of 1 day to 10 days, until said 1ZM-2 zeolite has been formed.