JP2011057987A5

JP2011057987A5 -

Info

Publication number: JP2011057987A5
Application number: JP2010204215A
Authority: JP
Filing date: 2010-09-13
Publication date: 2013-10-31
Anticipated expiration: 2030-09-13

Claims

Prerefining and hydroconversion of heavy hydrocarbon crude feed containing at least 0.5 wt% asphaltenes and more than 10 wtppm metals (nickel and / or vanadium) for the production of prerefined synthetic crude A fixed floor method of performing,
The feedstock has undergone hydrodemetallation in a hydrodemetallation (HDM) section, the hydrodemetallation (HDM) section comprising at least two switchable reaction zones, the switchable reaction Each zone comprises at least one hydrodemetallation catalyst;
-At least a portion of the at least partially demetalized effluent is then hydrocracked in a hydrocracking (HCK) section, the hydrocracking (HCK) section comprising at least one fixed bed hydrogenation Including a cracking catalyst;
• at least a portion of the at least partially hydrocracked effluent is then hydrodesulfurized in a hydrodesulfurization section, the hydrodesulfurization section comprising at least one hydrodesulfurization catalyst;
The HDM section and the HDS section operate in the presence of a catalyst system comprising at least two catalysts, one for HDM and the other for HDS, the HCK process is performed between the HDM process and the HDS process, The HDM catalyst and the HDS catalyst comprise at least one support composed of a porous refractory oxide, at least one metal from Group VIB, and at least two metals from Group VIII. , One of the at least two metals from group VIII is a major promoter termed VIII-1, and the other (s) is a co-promoter VIII-i (i is 2-5) In the catalyst, the elements from group VIII are in a proportion of 0.5-0 defined by the atomic ratio [VIII-1 / (VIII-1 +... + VIII-i)] A method existing at .85.

The process according to claim 1, wherein the switchable reaction zones are arranged in series for use in a circulation mode consisting of continuous repetition of steps b) and c) as defined below:
a) the switchable reaction zones are all used together for a period at least equal to the inactivation time and / or the occlusion time of one of them;
b) at least one of the switchable reaction zones is bypassed and the catalyst it contains is regenerated and / or replaced with fresh or regenerated catalyst;
c) a process in which all switchable reaction zones are used together, wherein the switchable reaction zones in which the catalyst has been regenerated and / or replaced during the preceding process are in their initial position or switchable zone Reconnected to another location within, the process continues for a period at least equal to the deactivation time and / or occlusion time of one of the switchable bands.

The process according to claim 2, wherein the switchable reaction zone in which the catalyst has been regenerated during step b) is reconnected to another position within the switchable reaction zone during step c).

The method according to claim 1 or 2, wherein the hydrodemetallation section also comprises at least one bypass reaction zone.

The process according to any one of claims 1 to 4 , wherein the hydrocracking section and / or the hydrodesulfurization section comprises at least one bypass reaction zone.

6. The method according to any one of claims 1 to 5 , wherein the hydrodemetallation section comprising at least two switchable reaction zones consists of a continuous repetition of steps b) and c). At least one reaction zone constituted by at least one bypass hydrodemetallation reactor comprising at least one hydrodemetallation catalyst for use in the process, which is also arranged in series, followed by hydrogenation The cracking section and the strong hydrodesulfurization section consist of one or more reaction zones, which can preferably be bypassed separately or otherwise by steps d) and e) below:
a) a step where all reaction zones are used together;
b) at least one of the switchable reaction zones is bypassed and the catalyst it contains is regenerated and / or replaced with fresh or regenerated catalyst;
c) The reaction zones are all used together, and switchable reaction zones in which the catalyst has been regenerated and / or replaced during the preceding steps are within their initial positions or switchable zones. Reconnecting to another location of the;
d) At least one of the reaction zones of the hydrodemetallation section and / or hydrocracking section and / or hydrodesulfurization section may be bypassed during the cycle if the catalyst is deactivated and / or blocked. Wherein the catalyst it contains is regenerated and / or replaced with fresh or regenerated catalyst;
e) A process in which the reaction zones in which the catalyst has been regenerated and / or replaced during the preceding process are reconnected to their initial position.

The hydrodemetallization section includes two switchable reaction zones and also includes one reaction zone constituted by a bypass hydrodemetallation reactor, the subsequent hydrocracking section and hydrodesulfurization section comprising a bypass reaction zone The method of claim 6, comprising:

8. A process according to claim 6 or 7, wherein the switchable reaction zone in which the catalyst has been replaced during step b) is reconnected to another position within the switching reaction zone during step c).

The hydroconversion catalyst comprises at least one metal selected from the group formed by the metals from Group VIII and Group VIB used alone or as a mixture, and one support, The method according to any one of claims 1 to 8, wherein the support comprises 10 to 90 wt% iron-containing zeolite and 90 to 10 wt% inorganic oxide.

The HDM catalyst and the HDS catalyst include a support composed of alumina, molybdenum as an element from Group VIB, nickel and cobalt as elements from Group VIII, and among the elements from Group VIII, One of these is a major promoter called VIII-1 and the other is called co-promoter VIII-i, i is equal to 2, in these catalysts the elements from group VIII are in atomic ratio [ The method according to any one of claims 1 to 9, wherein the method is present in a ratio of 0.5 to 0.85 defined by VIII-1 / (VIII-1 + VIII-2)].

The catalyst system is used in the first switchable reaction zone (s) at the inlet to the HDM section and on the first reaction zone (s) at the inlet to the HDS section. The method according to any one of claims 1 to 10, wherein the HDM section and the HDS section are separated by an HCK section.

12. At least a portion of the hydrodesulfurized effluent is then distilled by atmospheric distillation to obtain at least one atmospheric distillate fraction and atmospheric residue. The method according to one.