Fixed catalyst bed comprising metal foam bodies

Patent metadata

Field	Value
Publication number	US-11090637-B2
Application number	US-201716338044-A
Country	US
Kind code	B2
Filing date	Sep 27, 2017
Priority date	Sep 30, 2016
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

The present invention relates to a fixed bed of catalytically active metal foam bodies having a volume of not more than 500 mL which consist to an extent of at least 95 wt % of metals. The fixed bed is used for catalytic reactions in a three-phase reaction mixture.

First claim

The invention claimed is:

1. A fixed bed comprising catalytically active metal foam bodies for catalytic reaction of at least one reactant component in a liquid phase and at least one gaseous component, wherein the catalytically active metal foam bodies have a volume of not more than 500 millilitres, comprise at least 95 wt % of metals and are arranged as bulk goods in a packed bed and wherein the catalytically active metal foam bodies have a BET surface area of 1 to 200 m 2 /g and an oxygen content of not more than 7500 ppm.

2. The fixed bed of claim 1 , wherein the catalytically active metal foam bodies comprise one or more metals selected from the group consisting of: nickel, cobalt, iron, silver, platinum, chromium, molybdenum and tungsten.

3. The fixed bed of claim 2 , wherein the catalytically active metal foam bodies further comprise up to 25 wt % of Al.

4. The fixed bed of claim 1 , wherein the catalytically active metal foam bodies are present in the fixed bed as a loose fill material, wherein a volume of 1 L of this loose fill material has a weight of not more than 0.8 kg.

5. The fixed bed of claim 1 , wherein the catalytically active metal foam bodies are in the form of cylindrical, ring-shaped, cuboid, parallelepipedal or cubic bodies.

6. The fixed bed of claim 5 , wherein the catalytically active metal foam bodies have a cylindrical shape.

7. The fixed bed of claim 6 , wherein the cylindrically shaped catalytically active metal foam bodies are corrugated.

8. The fixed bed of claim 1 , wherein the catalytically active metal foam bodies have macroscopic pores having a size in the range from 100 to 5000 μm.

9. A process for catalytic reaction of at least one reactant component in a liquid phase and at least one gaseous component wherein said process is carried out using the fixed bed of claim 1 .

10. The process of claim 9 , wherein the process is performed as a continuous operation in a reactor having a total volume of at least 0.5 m 3 .

11. The process of claim 9 , wherein the catalytic reaction is a hydrogenation, wherein hydrogen is the gaseous component and the reactant component in the liquid phase comprises at least one unsaturated C—C bond and/or at least one functional group.

12. The process of claim 9 , wherein the catalytic reaction is a hydrogenation of at least one substance selected from the group consisting of: alkenes, alkynes, unsaturated alcohols, aromatic compounds, organic nitro and nitroso compounds, organic isocyanates, organic cyanide compounds, aldehydes and ketones; and wherein hydrogen is employed as the gaseous component.

13. The process of claim 9 , wherein the catalytic reaction is the hydrogenation of a sugar.

14. The process of claim 9 , wherein the catalytic reaction is a dehydrogenation of alcohols to produce aldehydes and/or ketones or a reductive amination of aldehydes and/or ketones.

15. The process of claim 9 , wherein the catalytic reaction is a synthesis of fatty amines or a reductive alkylation of organic compounds.

16. The fixed bed of claim 2 , wherein the catalytically active metal foam bodies are present in the fixed bed as a loose fill material, wherein a volume of 1 L of this loose fill material has a weight of not more than 0.8 kg.

17. The fixed bed of claim 16 , wherein the catalytically active metal foam bodies have macroscopic pores having a size in the range from 100 to 5000 μm.

Assignees

• Evonik Operations Gmbh

Inventors

• Wieland Stefan
• Roos Meike
• Poss René

Classifications

• B01J35/31

  Density · CPC title

• B01J2219/30491

  Foam like materials · CPC title

• B01J8/02 Primary

  with stationary particles, e.g. in fixed beds · CPC title

• C07C29/172

  with the obtention of a fully saturated alcohol · CPC title

• B01J2219/30475

  comprising catalytically active material · CPC title