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AssigneeShell Oil Company
InventorsJean-Louis Guth, Laurent Georges Huve, Anne-Claude Voegtlin
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Process for the preparation of a mesoporous, crystalline, acidic molecular sieve comprising the successive steps of (a) preparing an aqueous mixture comprising a silicon source, a fluorine source, and an organic template at a temperature in the range of at most 90° C. such that crystallization starts; (b) adjusting the pH of the solution to such value in the range of from about 5.0 to about 12.5 that a precipitate is formed; (c) recovering the precipitate; and (d) calcining the precipitate to obtain the mesoporous, crystalline, acidic molecular sieve, wherein an aluminum source is added in one or more of steps (a) and (b) and/or between steps (c) and (d) in such amount that after addition of all aluminum source the Si/Al atomic ratio is at least about 3.
A process for the preparation of a mesoporous, crystalline, acidic molecular sieve comprising the successive steps of
A process for the preparation of a mesoporous, crystalline, acidic molecular sieve comprising the successive steps of
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