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

2008-05-20

2009-06-23

Bullock, In Suk (Department: 1797)

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

From nonhydrocarbon feed

C502S020000, C502S022000, C502S026000, C502S034000, C502S027000, C502S054000, C502S055000

Reexamination Certificate

active

07550641

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.

REFERENCES:
patent: 3493490 (1970-02-01), Plank et al.
patent: 4055482 (1977-10-01), Robson
patent: 4310440 (1982-01-01), Wilson et al.
patent: 4440871 (1984-04-01), Lok et al.
patent: 4477582 (1984-10-01), Miale
patent: 4567029 (1986-01-01), Wilson et al.
patent: 4681864 (1987-07-01), Edwards et al.
patent: 4861743 (1989-08-01), Flank et al.
patent: 4871702 (1989-10-01), Chang et al.
patent: 5096684 (1992-03-01), Guth et al.
patent: 5126308 (1992-06-01), Barger et al.
patent: 5185310 (1993-02-01), Degnan et al.
patent: 6498120 (2002-12-01), Janssen et al.
patent: 6639117 (2003-10-01), Janssen et al.
patent: 6756516 (2004-06-01), Mees et al.
patent: 6825391 (2004-11-01), Janssen et al.

Affiliated with

Also associated with

Rating

Methods for recovering activity of molecular sieve catalysts does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods for recovering activity of molecular sieve catalysts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods for recovering activity of molecular sieve catalysts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4059443