Methods for recovering activity of molecular sieve catalysts

Details Methods for recovering activity of molecular sieve catalysts Methods for recovering activity of molecular sieve catalysts

2005-06-30

2009-06-23

Bullock, In Suk (Department: 1797)

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

Regenerating or rehabilitating catalyst or sorbent

Treating with a liquid or treating in a liquid phase,...

C502S020000, C502S026000, C502S034000, C502S054000, C502S055000

Reexamination Certificate

active

07550403

ABSTRACT:
The invention is directed to a method of rejuvenating silicoaluminophosphate molecular sieve catalyst that has been deactivated hydrothermally as well as a method of using the rejuvenated catalyst to make an olefin product from an oxygenate feed. In particular, the invention is directed to rejuvenating the catalyst by contacting it with warm water, ammonium salts, dilute acids or low pressure steam until the catalytic activity level of the catalyst has been increased to the desired extent.

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