Moving bed catalytic reactor for managing interruptions to the circulation of catalyst, and process using said reactor

Patent metadata

Field	Value
Publication number	US-10071356-B2
Application number	US-201515122000-A
Country	US
Kind code	B2
Filing date	Feb 11, 2015
Priority date	Feb 27, 2014
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

The present invention describes a catalytic reactor operating as a moving bed to manage interruptions in the circulation of catalyst while at the same time avoiding mechanical damage to the contact means containing the catalyst. The invention also concerns a refining or petrochemicals process using the reactor in accordance with the invention.

First claim

The invention claimed is:

1. A catalytic reactor employing a moving bed catalyst, in which the catalyst is enclosed in baskets ( 5 ) and in which said baskets are movable along a substantially vertical axis and provided with flaps ( 7 , 13 ) which are themselves substantially vertical, installed in the bottom portion of said baskets ( 5 ), and in which, during an interruption to the circulation of catalyst, a storage zone ( 11 ) for catalyst located in the lower portion of the reactor is opened up by lifting the assembly of the basket ( 5 ) and the flaps upwards.

2. The moving bed catalytic reactor according to claim 1 , in which the catalyst is enclosed in baskets ( 5 ) which are annular in shape, wherein the walls are constituted by screens which allow the feed to pass from the exterior towards the interior of the basket ( 5 ), then the reaction effluents to pass from the interior of the basket ( 5 ) towards a centre pipe ( 3 ).

3. The moving bed catalytic reactor according to claim 1 , in which the flaps ( 7 , 13 ) slide in vertical sleeves ( 12 ) and are provided with windows ( 14 ) which are obstructed by the sleeves ( 12 ) during normal circulation, said windows ( 14 ) being opened up when the basket ( 5 ) is lifted following an interruption to the circulation, thus allowing the catalyst to pass through said windows ( 14 ) towards the storage zone ( 11 ) located in the lower portion of the reactor between the sleeve ( 12 ) and the wall of the catalyst.

4. The moving bed catalytic reactor according to claim 3 , in which the windows ( 14 ) are rectangular in shape so as to allow the catalyst to enter the storage zone ( 11 ) in a uniform manner.

5. The moving bed catalytic reactor according to claim 3 , in which the windows ( 14 ) are triangular in shape, with the point of the triangle being directed upwardly, so as to allow the catalyst to enter the storage zone ( 11 ) in a progressive manner.

6. A process comprising:
conducting a refining or petrochemical process using the reactor according to claim 1 .

7. The process of claim 6 , wherein circulation of the catalyst under gravity is resumed as soon as the circulation is re-established.

8. A process comprising:
catalytic reforming of gasoline using the reactor according to claim 1 .

9. A process comprising:
conducting a residue hydrotreatment process using the reactor according to claim 1 .

Assignees

• Axens

Inventors

• Lambert Fabian

Classifications

• B01J2208/00761

  Discharging · CPC title

• B01J2208/00884

  Means for supporting the bed of particles, e.g. grids, bars, perforated plates · CPC title

• B01J2208/027

  Beds · CPC title

• B01J2208/00769

  Details of feeding or discharging · CPC title

• B01J8/12 Primary

  moved by gravity in a downward flow · CPC title