US Patent 7550403 Methods for recovering activity of molecular sieve catalysts

Patent 7550403 was granted and assigned to Honeywell UOP on June, 2009 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Honeywell UOP

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

75504030

Patent Inventor Names

John Q. Chen0

Date of Patent

June 23, 2009

Patent Application Number

111718860

Date Filed

June 30, 2005

Patent Primary Examiner

‌

In Suk Bullock

Patent 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.