C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/228, 252/33
C10G 25/06 (2006.01) C10G 25/00 (2006.01) C10G 25/09 (2006.01)
Patent
CA 1175000
-2- ABSTRACT Crude oils or residual fractions from the distillation of petroleum containing substantial amounts of metals such as Ni, V, Fe, Cu, Na and high Conradson carbon values are made suit- able for processing in reduced crude conversion processes by preliminary contacting with a sorbent containing a metal addi- tive to immobilize vanadium pentoxide deposited on the sorbent material. It has been shown previously that as the vanadium pentoxide level builds up on the sorbent, the elevated temperature encountered in the regeneration zone causes the vanadia to flow and form a liquid coating on each particle. Any interuption of particle flow results in coalescence between the sorbent par- ticles. Once coalescence occurs, fluidization becomes diffi- cult to reinitiate. This results in stoppage of flow in the cyclone diplegs, ineffective operation of cyclones, rapid increase in loss of the sorbent, finally resulting in unit shutdown. The sorbent can also be made, as we have done, by combining and precipitating other gels with the clay so as to act as a binder for initial utilization until some hydrothermal conditioning occurs. This binder, such as silica, alumina, titania, zircon- ia, calcia, boria, or magnesia then serves a dual purpose as disclosed herin. Metal additives, described in this invention, when properly -3- applied serve to form compounds or complexes with vanadia which have melting points above the temperatures encountered in the regeneration zone, thus avoiding the formation of liquid vana- dia and coalescence between particles. A second method of avoiding vanadia liquidation can be employed by means of select regeneration conditions wherein the regenerated sorbent is recovered in a partially coked state. In this case, the deposited vanadia is held in a lower oxidation state, the oxides of which have melting temperatures above those encount- ered in the regeneration zone.
399612
Beck H. Wayne
Carruthers James D.
Cornelius Edward B.
Hettinger William P. Jr.
Kovach Stephen M.
Ashland Oil Inc.
Gowling Lafleur Henderson Llp
LandOfFree
Immobilization of vanadian deposited on sorbent materials... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Immobilization of vanadian deposited on sorbent materials..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Immobilization of vanadian deposited on sorbent materials... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1207772