Process for continuous synthesis of zsm-5 zeolite
AssigneeArkema France
InventorsElsy EL HAYEK, Heidy RAMIREZ-MENDOZA, Cécile LUTZ, Mélanie VAUTHRIN, Sylvie SZENDROVICS
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Abstract
The present invention relates to a process for the continuous synthesis of zeolite crystals of type ZSM-5 comprising the continuous feeding of a tubular reactor with a synthesis medium comprising a source of silica, a source of alumina and seeds, rapid heating of the synthesis medium to a value of between 100° C. and 300° C., crystallization at a temperature at least equal to or higher than the temperature of the previous step, and continuous recovery of zeolite crystals of type ZSM-5.
Claims11
A process for the continuous synthesis of ZSM-5 zeolite crystals, the process comprising at least the following steps a) to d):
- a) continuous feeding of a tubular reactor with a synthesis medium comprising a source of silica, a source of alumina and seeds;
- b) heating of the synthesis medium for a period equivalent to the residence time in at most ⅓ of the total length of the tubular reactor, up to a value of between 100° C. and 300° C.;
- c) crystallization at a temperature at least equal to or higher than the temperature of the previous step;
- d) continuous recovery of zeolite crystals of type ZSM-5.
Dependencies are inferred from the claim text.