Regenerator for regenerating catalysts under different operating conditions

Patent metadata

Field	Value
Publication number	US-9708552-B2
Application number	US-201514848657-A
Country	US
Kind code	B2
Filing date	Sep 9, 2015
Priority date	Sep 10, 2014
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

The present invention concerns a moving bed catalyst regenerator ( 1 ) comprising a vessel ( 2 ) extending in a vertical direction, said vessel being divided into at least two regeneration zones extending along the vertical height of said vessel, in which particles of catalyst move under gravity, in which each regeneration zone comprises, in succession and in the order in which the catalysts move:
a) a combustion section (CO); b) an oxychlorination section (O) disposed below the combustion section and comprising means for bringing catalyst from the combustion section (CO) to the oxychlorination section (O); c) a calcining section (CA) disposed below the oxychlorination section; characterized in that the regeneration zones are separated from each other by a separation means which is impermeable to catalysts and to gases in a manner such that the catalysts of each of the zones are capable of being regenerated under different operating conditions.

First claim

The invention claimed is:

1. A moving bed catalyst regenerator ( 1 ) comprising a vessel ( 2 ) extending in a vertical direction, said vessel being divided into at least two regeneration zones extending along the vertical height of said vessel, in which particles of catalyst move under gravity, in which each regeneration zone comprises, in succession and in the order in which the catalysts move:
a) a combustion section (CO);
b) an oxychlorination section (O) disposed below the combustion section and comprising means for bringing catalyst from the combustion section (CO) to the oxychlorination section (O);
c) a calcining section (CA) disposed below the oxychlorination section;
characterized in that the regeneration zones are separated from each other by a separation means which is impermeable to catalysts and to gases in a manner such that the catalysts of each of the zones are capable of being regenerated under different operating conditions.

2. The regenerator according to claim 1 , in which each of the combustion sections comprises an annular space defined by two sieves which are permeable to gas and impermeable to catalysts in which the catalyst moves under gravity.

3. The regenerator according to claim 2 , in which the sieves are selected from a screen and a perforated plate.

4. The regenerator according to claim 1 , in which each of the combustion sections is formed by a portion of an annular space ( 30 ), the annular space ( 30 ) being defined by two sieves ( 9 , 9 ′) which are permeable to gas and impermeable to catalysts and divided into portions by separation means ( 34 ) which are impermeable to catalysts and to gas.

5. The regenerator according to claim 1 , in which each oxychlorination section is obtained by partitioning a zone of the vessel ( 2 ) into compartments ( 22 , 22 ′) by a separation means ( 23 ) which is impermeable to catalysts and to gas.

6. The regenerator according to claim 1 , in which each calcining section is obtained by partitioning a zone of the vessel ( 2 ) into compartments ( 26 , 26 ′) by a separation means ( 27 ) which is impermeable to catalysts and to gas.

7. The regenerator according to claim 1 , in which the oxychlorination section is separated from the calcining section by a mixing section which is configured to carry out mixing of oxychlorination gas with calcining gas.

8. A continuous catalytic reforming unit ( 40 ) comprising:
at least a first reaction zone ( 41 ) and at least a second reaction zone ( 42 ), the first and second reaction zones respectively containing at least a first moving bed of catalyst and at least a second moving bed of catalyst;
a regenerator ( 1 ) according to claim 1 , which is capable of simultaneously and separately regenerating the catalysts of the first and second reaction zones ( 41 , 42 ) under different operating conditions.

9. The catalytic reforming unit ( 40 ) according to claim 8 , in which the first and second reaction zones ( 41 , 42 ) are disposed in a vertical stack in a reactor.

10. The catalytic reforming unit ( 40 ) according to claim 8 , in which the first and second reaction zones ( 41 , 42 ) are respectively disposed in at least a first reactor and at least a second reactor which are arranged side by side.

11. The catalytic reforming unit ( 40 ) according to claim 8 , in which the composition of the catalyst of the first reaction zone ( 41 ) is different from that of the catalyst of the second reaction zone ( 42 ).

12. A process for catalytic reforming of a hydrocarbon feed, comprising the following steps:
a) treating the hydrocarbon feed in the presence of hydrogen in at least a first reaction zone ( 41 ) comprising at least one moving bed of a first catalyst;
b) continuously and separately withdrawing an effluent and the first catalyst from the first reaction zone ( 41 );
c) treating the effluent obtained from the first reaction zone ( 41 ) in the presence of hydrogen in at least a second reaction zone ( 42 ) comprising at least one moving bed of a second catalyst;
d) continuously and separately withdrawing a reformate and the second catalyst from the second reaction zone ( 42 );
e) sending the first and second catalysts from the first and second reaction zones to a regenerator ( 1 ) according to claim 1 and regenerating said first and second catalysts under different operating conditions;
f) separately sending the regenerated catalysts to the respective first and second reaction zones ( 41 , 42 ).

13. The process according to claim 12 , in which the composition of the catalyst for the first reaction zone ( 41 ) differs from that of the catalyst for the second reaction zone ( 42 ).

14. The process according to claim 12 , in which the flows of the feed, the effluents and the catalysts are as co-currents in a downward direction.

15. The process according to claim 12 , in which the first and second reaction zones ( 41 , 42 ) are disposed in a vertical configuration in a reactor with the first reaction zone ( 41 ) being located above the second reaction zone ( 42 ).

16. The process according to claim 12 , in which the first and second reaction zones ( 41 , 42 ) are disposed side by side respectively in at least a first reactor and at least a second reactor.

17. A moving bed catalyst regenerator ( 1 ) comprising a vessel ( 2 ) extending in a vertical direction, said vessel being divided into at least two regeneration zones extending along the vertical height of said vessel, in which particles of catalyst move under gravity, in which each regeneration zone comprises, in succession and in the order in which the catalysts move:
a) a combustion section (CO);
b) an oxychlorination section (O) disposed below the combustion section and comprising a conduit for bringing catalyst from the combustion section (CO) to the oxychlorination section (O);
c) a calcining section (CA) disposed below the oxychlorination section;
characterized in that the regeneration zones are separated from each other in a manner such that the catalysts of each of the zones are capable of being regenerated under different operating conditions.

18. The regenerator according to claim 17 , in which each of the combustion sections is formed by a portion of an annular space ( 30 ), the annular space ( 30 ) being defined by two sieves ( 9 , 9 ′) which are permeable to gas and impermeable to catalysts and divided into portions by one or more separation plates ( 34 ) which are impermeable to catalysts and to gas.

19. The regenerator according to claim 17 , in which each oxychlorination section is obtained by partitioning a zone of the vessel ( 2 ) into compartments ( 22 , 22 ′) by a plate ( 23 ) which is impermeable to catalysts and to gas.

20. The regenerator according to claim 17 , in which each calcining section is obtained by partitioning a zone of the vessel ( 2 ) into compartments ( 26 , 26 ′) by a plate ( 27 ) which is impermeable to catalysts and to gas.

Assignees

• Ifp Energies Now

Inventors

• Bazer-Bachi Frederic
• Lemaire Eric
• Lambert Fabian

Classifications

• B01J8/008 Primary

  Details of the reactor or of the particulate material; Processes to increase or to retard the rate of reaction (B01J8/0285, B01J8/067, B01J8/087, B01J8/1836 take precedence) · CPC title

• B01J38/34

  with plural distinct serial combustion stages · CPC title

• C10G59/02 Primary

  plural serial stages only · CPC title

• B01J2208/00752

  Feeding · CPC title

• B01J38/44

  and adding simultaneously or subsequently free oxygen; using oxyhalogen compound · CPC title