BigPatents India

Process for zeolite synthesis from a. synthesis medium containing especially a source of trivalent aluminum, a source of tetravalent silicon, at least one alkali or alkaline-earth metal cation in hydroxide form and water in a reactor, characterized in that the; said synthesis medium is circulated in the reactor as at least two flows in opposite direction solely by means of a solid helical rotor driven in rotation at a speed lower than 500 rev/min in a guide tube which, motionless in the reactor, defines a space which is internal and a space which is external to the said tube, the first flow moving through the internal space and the second flow iioving through the external space in the opposite direction, the circulating synthesis medium being maintained at a temperature necessary for at least one of the operations of maturing or of crystal growth of the zeolite to be synthesized.