Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking
Patent
1987-07-22
1988-07-05
McFarlane, Anthony
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Cracking
55 70, 208153, 208161, 208164, 423237, 423239, 502 41, 502 43, C06, B01J 802
Patent
active
047552824
ABSTRACT:
This process discloses a reduction in the content of ammonia in a regeneration zone off gas of a fluid catalytic cracking unit by the select recycle of certain sized ammonia decomposition catalyst particles. The ammonia decomposition may be aided by injection of NO.sub.x into the off gas. The particles are acquired from a separation means through which is passed the regeneration zone off gas. A solid-free regeneration zone off gas and a stream of solid particles, including a noble metal dispersed on an inorganic support, having a size of from 10 to 40 microns, are acquired. The latter segregated particles are then injected into the regeneration zone at a predetermined make-up rate to insure a very short residence time in the dense phase of the regeneration zone and to provide a relatively constant concentration of the NH.sub.3 decomposition catalyst in the dilute phase of the regeneration zone to convert NH.sub.3 to N.sub.2 and water vapor. The regeneration zone is operated in a partial combustion mode defined by a CO content of from 1 to 6 percent by volume.
REFERENCES:
patent: 3058906 (1962-10-01), Stine et al.
patent: 3467491 (1969-09-01), Hardison
patent: 4081508 (1978-03-01), Luckenbach
patent: 4115250 (1978-09-01), Flanders et al.
patent: 4115251 (1978-09-01), Flanders et al.
patent: 4153535 (1979-05-01), Vasalos et al.
patent: 4204944 (1980-05-01), Flanders et al.
patent: 4204945 (1980-05-01), Flanders et al.
patent: 4221677 (1980-09-01), Vasalos et al.
patent: 4238317 (1980-12-01), Vasalos et al.
patent: 4290878 (1981-09-01), Blanton, Jr.
patent: 4354923 (1982-10-01), Myers et al.
patent: 4368057 (1983-01-01), Matthews
patent: 4412914 (1983-11-01), Hettinger et al.
patent: 4425259 (1984-01-01), Hettinger et al.
patent: 4427536 (1984-01-01), Klaassen et al.
patent: 4434147 (1984-02-01), Dimpfl et al.
patent: 4435282 (1984-03-01), Bertolacini et al.
patent: 4438082 (1984-03-01), Dettling et al.
patent: 4521389 (1985-06-01), Blanton et al.
patent: 4613428 (1986-09-01), Edison
Gwyn John E.
Samish Norman C.
McFarlane Anthony
Muller Kimbley L.
Shell Oil Company
LandOfFree
Process for the reduction of NH.sub.3 in regeneration zone off g does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the reduction of NH.sub.3 in regeneration zone off g, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the reduction of NH.sub.3 in regeneration zone off g will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2330893