Microwave spent catalyst decoking method

Details Microwave spent catalyst decoking method Microwave spent catalyst decoking method

2008-11-04

2010-06-29

Hendrickson, Stuart (Department: 1793)

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

Regenerating or rehabilitating catalyst or sorbent

By heat

C502S040000, C502S038000

Reexamination Certificate

active

07745366

ABSTRACT:
The microwave spent catalyst decoking method is a method for regenerating petrochemical catalysts by removing coke deposited in the catalyst using a 2.45 GHz microwave oven. The spent catalyst is heated in air or pure oxygen in the presence of a susceptor. The susceptor is made of silicon carbide-based composite material that absorbs 2.45 GHz microwave energy fast and efficiently. In one embodiment, the susceptor material is formed into pellets that are preferably four to five millimeters in diameter. The susceptor pellets are mixed with the spent catalyst and loaded into a thermally shielded refractory tube that rotates about its central axis. In a another embodiment, the apparatus is a thermally shielded tower or vertical tube made of refractory material that is transparent to microwave radiation and supports rows of susceptor rods that are aligned horizontally.

REFERENCES:
patent: 4026821 (1977-05-01), Schoofs et al.
patent: 4144189 (1979-03-01), Kirkbride
patent: 4282066 (1981-08-01), Wagener et al.
patent: 4398076 (1983-08-01), Hanson
patent: 4551437 (1985-11-01), Berrebi
patent: 4605371 (1986-08-01), Berrebi
patent: 4663507 (1987-05-01), Trerice
patent: 4749470 (1988-06-01), Herbst et al.
patent: 4968403 (1990-11-01), Herbst et al.
patent: 5073349 (1991-12-01), Herbst et al.
patent: 5374413 (1994-12-01), Kim et al.
patent: 5382412 (1995-01-01), Kim et al.
patent: 6184427 (2001-02-01), Klepfer et al.
patent: 6516143 (2003-02-01), Toya et al.
patent: 6596915 (2003-07-01), Satyapal et al.
patent: 2004/0175547 (2004-09-01), Blankenbeckler et al.
patent: 2006/0252630 (2006-11-01), Fanson et al.
patent: 2008/0142511 (2008-06-01), Ripley
patent: 3504878 (1979-10-01), None
patent: 1128894 (1982-08-01), None
patent: 8295951 (1996-11-01), None
patent: 11246918 (1999-09-01), None

Affiliated with

Also associated with

Rating

Microwave spent catalyst decoking method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microwave spent catalyst decoking method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microwave spent catalyst decoking method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4245545