Maintaining molecular sieve catalytic activity under water...

Details Maintaining molecular sieve catalytic activity under water... Maintaining molecular sieve catalytic activity under water...

2006-03-21

2006-03-21

Wood, Elizabeth D. (Department: 1755)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Phosphorus or compound containing same

C502S208000

Reexamination Certificate

active

07015174

ABSTRACT:
The invention is directed to methods for protecting metalloaluminophosphate molecular sieves, particularly silicoaluminophosphate (SAPO) molecular sieves, from loss of catalytic activity due to contact with a gas containing water. The methods of the invention provide procedures that enable activated sieve to contact water vapor, within a certain range of time, temperature, and water partial pressure conditions, before the sieve becomes substantially deactivated.

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