Process for producing substantially binder-free zeolite
AssigneeExxon Chemical Patents Inc.
InventorJohannes Petrus Verduijn
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Abstract
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.sup.- :SiO.sub.2 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.
Claims20
A zeolite-bound zeolite which is substantially free of non-zeolitic binder comprising a plurality of first matrix zeolite crystals said first matrix zeolite being selected from the group consisting of MFI, KFI, Y, Beta, Omega, Chabasite, T, Offretite, ZSM-22, ZSM-23, titanosilicate, ZSM-34, and ZSM-12 bound together with second zeolite crystals which are of the same type or a crystallographic match of said first matrix zeolite, said second zeolite crystals having a submicron particle size and being smaller than said first matrix zeolite crystals.
Dependencies are inferred from the claim text.