Method for calcining crystalline (metallo)aluminophosphate compo

Details Method for calcining crystalline (metallo)aluminophosphate compo Method for calcining crystalline (metallo)aluminophosphate compo

1990-12-31

1992-12-29

Breneman, R. Bruce

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

502208, 502214, C01B 3334

Patent

active

051749769

ABSTRACT:
This invention relates to a method for calcining without structural alteration crystalline [metallo]aluminophosphate compositions, e.g, those comprising pores which are formed by 18-membered rings. The method comprises contacting the dried composition with an inert gas at high flow rates while heating said composition to calcining temperature at a heating rate no greater than 10.degree. C./minute. Thereafter the composition is contacted at calcining temperature with an oxygen-containing gas at high flow rates.

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