Process for producing substantially binder-free zeolite

Details Process for producing substantially binder-free zeolite Process for producing substantially binder-free zeolite

C - Chemistry, Metallurgy

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C01B 33/18 (2006.01) B01J 20/18 (2006.01) B01J 29/06 (2006.01) B01J 29/40 (2006.01) B01J 29/80 (2006.01) C01B 37/02 (2006.01) C01B 39/02 (2006.01) B01J 29/08 (2006.01) C01B 33/34 (1990.01)

Patent

CA 2101174

Silica-bound extruded zeolites may be converted into binder-free zeolite aggregates by aging the zeolite in an aqueous ionic solution which contains hydroxy ions such that the initial molar ratio of OH- :SiO2 is up to 1.2 and which causes the silica binder to be converted substantially to zeolite of the type initially bound. Such extrudates have excellent mechanical strength and show advantageous properties such as adsorption comparable with non- extruded zeolite powder.

Des zéolites extrudées, liées par silice, peuvent être transformées en agrégats de zéolites sans liant, par vieillissement de la zéolite dans une solution ionique aqueuse qui contient des ions hydroxy, dans laquelle le rapport molaire initial OH-:SiO2 atteint 1,2, et qui fait transformer le liant, qui était du silice, pratiquement en une zéolite du type qui était initialement lié. De tels extrudats ont une excellente résistance mécanique et des propriétés avantageuses, telles qu'un pouvoir d'adsorption, comparable à celles d'une poudre de zéolites non extrudées.

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