Device for distributing gas and liquid in catalytic distillation columns

Patent metadata

Field	Value
Publication number	US-10363494-B2
Application number	US-201715581237-A
Country	US
Kind code	B2
Filing date	Apr 28, 2017
Priority date	Apr 29, 2016
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

Abstract

The present invention describes a device for supplying the catalytic zone of a reactive distillation column using a liquid stream as the reaction stream, the flow of liquid in the reactive zone being of the upflow type and gas not encountering the liquid in the reactive zone.

First claim

The invention claimed is:

1. A reactive distillation column comprising alternating catalytic zones ( 8 ) and distillation zones (B) in which:
at each of the catalytic zones ( 8 ), a liquid is introduced upstream of said catalytic zones ( 8 ) via a central liquid collector comprising a cylindrical or parallelepipedal portion ( 3 ) followed by a tubular portion ( 4 ) which brings the liquid into a liquid distribution zone ( 5 ) located below the catalytic zones ( 8 ), said distribution zone ( 5 ) having a cross-section that is the same as said catalytic zone,
the liquid then passing through the catalytic zone in upflow mode and being evacuated from said catalytic zone via a peripheral zone ( 6 ) abutting a wall of the column or via a system of vents ( 10 ) passing through the catalytic zone,
a gas bypasses a catalytic zone (C) via a dedicated peripheral zone ( 7 ) or via an array of vertical vents ( 9 ) which discharge above an upper level of liquid weirs ( 12 ),
the central collector ( 3 ) being provided with an overflow device the height H of which, precisely defined as the maximum height of liquid between a level in the weirs ( 12 ) of a liquid layer ( 11 ) and the top of the overflow device of the central collector ( 3 ), has a value of 0.2 m to 2 m.

2. The reactive distillation column as claimed in claim 1 , in which the liquid is evacuated via said peripheral zone ( 6 ), and the catalytic zone is bypassed by the gas through the array of vertical vents ( 9 ).

3. The reactive distillation column as claimed in claim 1 , in which the liquid is evacuated via the system of vents ( 10 ), and the catalytic zone is bypassed by the gas through the array of vertical vents ( 9 ).

4. The reactive distillation column as claimed in claim 1 , in which the number of vertical vents ( 9 ) allowing the gas to bypass the catalytic zone per unit section of the catalytic zone is 1 to 20 vents/m 2 .

5. The reactive distillation column as claimed in claim 1 , in which the liquid is evacuated from the catalytic zone via the system of vents ( 10 ) and the catalytic zone is bypassed by the gas by means of the dedicated peripheral zone ( 7 ).

6. The reactive distillation column as claimed in claim 1 , in which the liquid is evacuated from the catalytic zone via the system of vents ( 10 ) and the catalytic zone is bypassed by the gas by means of the array of vertical vents ( 9 ), the system of vents ( 10 ) being interposed between the array of vertical vents ( 9 ).

7. The reactive distillation column as claimed in claim 6 , in which the number of liquid evacuation vents ( 10 ) is 20 to 200 vents/m 2 .

8. The reactive distillation column as claimed in claim 1 , wherein the top of the overflow device of the central collector ( 3 ) has a value of 0.3 m to 1 m.

9. The reactive distillation column as claimed in claim 6 , in which the number of liquid evacuation vents ( 10 ) is 100 to 150 vents/m 2 .

Assignees

• Ifp Energies Now

Inventors

• Augier Frederic
• Bazer-Bachi Frederic
• Coupard Vincent
• Leinekugel Le Cocq Damien

Classifications

• B01D3/009 Primary

  in combination with chemical reactions · CPC title

• B01D3/008

  Liquid distribution · CPC title

• B01J8/04

  the fluid passing successively through two or more beds · CPC title

• B01D3/14

  Fractional distillation {or use of a fractionation or rectification column} · CPC title

• B01J8/0085

  promoting uninterrupted fluid flow, e.g. by filtering out particles in front of the catalyst layer · CPC title