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AssigneeElf Aquitaine
InventorsDidier Anglerot, Jacques Bousquet, Francesco Di Renzo, Jean-Paul Klein, Philippe Schulz, Christine Bebon, Didier Colson
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A method is provided for zeolite synthesis from a synthesis medium containing in particular a trivalent aluminum source, a tetravalent silicon source, at least an alkaline or alkaline-earth cation in hydroxide form and water in a reactor containing a solid helical moving body in a guiding tube defining an internal space and a space external to the tube. The invention is characterized in that the synthesis medium is circulated in the reactor in a continuous flow passing through the internal space then the space external to the tube and returning to the internal space, only driven by the roation of the solid helical moving body, at a speed of less than 500 rpm, in the tube which is kept fixed, the synthesis medium being kept at a temperature suitable for at least one of the ripening operations or the crystal growth of the synthesized zeolite. The invention also is directed to a device for implementing the method.
A process for the synthesis of a zeolite from a synthesis medium containing a source of trivalent aluminum, a source of tetravalent silicon, at least one alkali or alkaline-earth metal cation in hydroxide form and water, comprising maintaining said synthesis medium at a maturing temperature or crystallizing temperature in a reactor containing a solid helical rotor in a guide tube defining a space which is internal and a space which is external to the said tube, wherein said synthesis medium is circulated in the reactor as a continuous flow moving through the space which is internal and then the space which is external to said tube and returning to the internal space, solely by the rotation of the solid helical rotor, at a speed lower than 500 rev/min, in said guide tube held stationary.
Dependencies are inferred from the claim text.