Apparatus for hydrocarbon conversion

• US 3,909,208 A
• Filed: 12/13/1972
• Issued: 09/30/1975
• Est. Priority Date: 12/17/1971
• Status: Expired due to Term

• Current Assignee: Andre Vidal, Charles Bronner, Roger Boret, Roland Huin
• Original Assignee: Andre Vidal, Charles Bronner, Roger Boret, Roland Huin
• Inventors: Boret, Roger, Bronner, Charles, Huin, Roland, Vidal, Andre
• Primary Examiner(s): Scovronek, Joseph
• Application Number:
  US05/314,587
• Time in Patent Office: 1,021 Days
• Field of Search: 23/288R,288G,288E,288B,288C,288D 208/146,108,134,143,152,165,169 260/684,690,696 196/115,133
• US Class Current: 422/218
• CPC Class Codes: B01J 8/0214 in a cylindrical annular shaped bed
• CPC Class Codes: B01J 8/0278 Feeding reactive fluids for solid material B01J8/0015
• CPC Class Codes: B01J 8/12 moved by gravity in a downward flow
• CPC Class Codes: C10G 35/04 Catalytic reforming
• CPC Class Codes: C10G 49/002 Apparatus for fixed bed hydrotreatment processes

Abstract

A catalytic reaction chamber of the radial flow type comprising an external distribution chamber, an annular zone for the catalyst bed, limited by two perforated walls and a central manifold including a screen of inverted truncated cone shape extending downwardly from the top of the catalytic zone. Optionally, the higher portion of the external perforated wall may have the shape of a truncated cone.

Claims

1. AN APPARATUS FOR CONVERTING HYDROCARBONS IN THE PRESENCE OF A CATALYST, WHICH COMPRISES A SUBSTANTIALLY VERTICAL ELONGATED ENCLOSURE WHOSE SECTION BY A HORIZONTAL PLACE IS CURVILINEAR, SAID ELONGATED ENCLOSURE CONTAINING AN ANNULAR ENCLOSURE FOR RECEIVING A BED OF CATALYST, ARRANGED SUBSTANTIALLY VERTICALLY IN THE ELONGATED ENCLOSURE, SAID ANNULAR ENCLOSURE BEING DEFINED BETWEEN TWO CYLINDRICAL PERFORATED WALLS, THE CYLINDRICAL PERFORATED WALL WHICH IS CLOSER TO THE WALLS OF THE ELONGATED ENCLOSURE BEING REFERRED TO AS "EXTERNAL WALL OF THE ANNULAR ENCLOSURE" AND THE OTHER BEING REFERRED TO AS "INTERNAL WALL OF THE ANNULAR ENCLOSURE", SAID PERFORATED WALLS BEING FOR RADICAL FLOW OF A REACTANTS THROUGH SAID ANNULAR ENCLOSURE, SAID APPARATUS COMPRISING:

AN INTERNAL MANIFOLD ADJACENT TO SAID ANNULAR ENCLOSURE AND COMPRISING THE INTERNAL SPACE OF THE ELONGATED ENCLOSURE LIMITED BY THE INTERNAL CYLINDRICAL WALL OF SAID AN EXTERNAL FEED SPACE ADJACENT TO SAID ANNULAR ENCLOSURE AND FORMED OF THE SPACE LIMITED BY THE WALLS OF THE ELONGATED ENCLOSURE AND THE EXTERNAL CYLINDRICAL WALL OF SAID ANNULAR ENCLOSURE, AN INLET COMMUNICATING WITH THE INTERNAL MANIFOLD ADJACENT TO SAID ANNULAR ENCLOSURE FOR FEEDING THE REACTANTS, AN OUTLET COMMUNICATING WITH THE INTERNAL MANIFOLD ADJACENT TO SAID ANNULAR ENCLOSURE FOR DISCHARGING THE REACTION PRODUCTS,

2. An apparatus according to claim 1, in which the angle formed by the axis of the truncated cone and one of its generatrices is not less than 10* nor more than 30*.

3. An apparatus according to claim 1, also including a perforated cylindrical internal distributor between the internal wall of said annular enclosure and the internal manifold of said annular enclosure, the surface of the perforations of said distributor being not less than 2% or more than 7 % of the total surface of the perforated wall.

4. An apparatus according to claim 3, wherein the perforated distributor extends upwardly beyond the lower level of the screen by a length not less than 10% and not more than 40% of the height of the screen.

5. An apparatus according to claim 3, in which the area of the perforations of the portion of the perforated distributor located near the foot of the screen is 1.5 to 4 times that of the other perforations of the perforated distributor.

6. An apparatus according to claim 5, wherein the perforated distributor extends upwardly beyond the lower level of the screen by a length not less than 10% and not more than 40% of the height of the screen.

7. An apparatus according to claim 1, wherein the upper portion of the external wall of said annular enclosure has the shape of a truncated cone having a height of not less than 10% and not more than 40% of said annular enclosure, the section of said truncateD cone increasing downwardly, the larger base of said truncated cone being substantially equal to the section of said external cylindrical wall of said annular enclosure, and the angle formed by the axis of said truncated cone with one of its generatrices being not less than 2* and not more than 55*.

8. An apparatus according to claim 7, in which the area of the perforations of the portion of the perforated distributor located near the foot of the screen is 1.5 to 4 times that of the other perforations of the perforated wall.

9. An apparatus according to claim 7, wherein the perforated distributor extends upwardly beyond the lower level of the screen by a length not less than 10% and not more than 40% of the height of the screen.