Basket-like device having wall insulation

Patent metadata

Field	Value
Publication number	US-9725320-B2
Application number	US-201414911952-A
Country	US
Kind code	B2
Filing date	Aug 6, 2014
Priority date	Aug 16, 2013
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A device D accommodated in a reactor R and containing a gas- and/or liquid-permeable bottom B, in the peripheral region of which is arranged a lateral boundary W which completely surrounds the bottom B and forms a volume V which is partially or completely filled with catalytic and/or non-catalytic moldings, there optionally being located on the side facing the bottom B in the upstream direction at least one noble metal and/or non-noble metal fabric, wherein a thermal insulation layer S is located on at least part of the surface of the inner side of the lateral boundary W of the device D, the material for the thermal insulation layer S being selected from the group consisting of ceramic material, microporous material and silicate fibers.

First claim

The invention claimed is:

1. A device that can be accommodated in a reactor, the device comprising:
a gas- and/or liquid-permeable bottom;
a peripheral region arranged as a lateral boundary that completely surrounds the bottom and forms a volume, the volume which is partially or completely filled with catalytic and/or non-catalytic moldings;
a thermal insulation layer positioned on at least part an inner side surface of the lateral boundary of the device, the thermal insulation layer being a microporous, silicatic material that includes highly dispersed silica and opacifiers, and which exhibits no decomposition in a temperature range from 700 to 1100° C., and has a thermal conductivity in a range from 0.04 to 0.09 W/m/K; and
optionally at least one noble metal and/or non-noble metal fabric located on a side facing the bottom in the upstream direction.

2. The device of claim 1 , wherein the thermal insulation layer covers 30% to nearly 100% of the inner side surface of the lateral boundary.

3. The device of claim 1 , wherein the thermal insulation layer covers at least the lower 30% of the inner side surface of the lateral boundary.

4. The device of claim 1 , wherein the cross-section of the bottom is essentially round.

5. The device of claim 1 , including the at least one noble metal and/or non-noble metal fabric.

6. The device of claim 5 , wherein the noble metal and/or non-noble metal fabric is present, and is positioned atop the catalytic and/or non-catalytic moldings.

7. A reactor that includes a device,
the device comprising:
a gas- and/or liquid-permeable bottom;
a peripheral region arranged as a lateral boundary that completely surrounds the bottom and forms a volume, the volume which is partially or completely filled with catalytic and/or non-catalytic moldings;
a thermal insulation layer positioned on at least part an inner side surface of the lateral boundary of the device, the thermal insulation layer being a microporous, silicatic material that includes highly dispersed silica and opacifiers, and which exhibits no decomposition in a temperature range from 700 to 1100° C., and has a thermal conductivity in a range from 0.04 to 0.09 W/m/K; and
optionally at least one noble metal and/or non-noble metal fabric located on a side facing the bottom in the upstream direction; and

cooling devices arranged proximate to an internal wall of the reactor and an outer side of the lateral boundary of the device.

8. The reactor of claim 7 with an essentially round cross-section.

9. The reactor of claim 7 , further comprising a thermal insulation layer proximate to the internal wall of the reactor, and which partially replaces the cooling devices.

10. A method for producing nitrogen oxides by catalytic oxidation of ammonia with an oxygen-containing gas with the reactor of claim 7 .

11. The method of claim 10 further comprising reacting the nitrogen oxides with water to yield nitric acid.

12. A method for producing nitrogen oxides, ammonia being catalytically oxidized with an oxygen-containing gas and the resultant reaction products being passed through a bed with catalytic and/or non-catalytic moldings, wherein the bed is located in a device as defined in claim 1 .

13. The method of claim 12 , wherein oxidation is carried out in a reactor as defined in claim 7 .

14. A method for producing nitric acid, ammonia being catalytically oxidized with an oxygen-containing gas and the resultant reaction products being passed through a bed with catalytic and/or non-catalytic moldings and thereafter being reacted with water to yield nitric acid, wherein the bed is located in a device as defined in claim 1 .

15. The method of claim 14 , wherein oxidation is carried out in a reactor as defined in claim 7 .

Assignees

• Basf Se

Inventors

• Olbert Gerhard
• Friedrich Holger
• Wölfert Andreas
• Kuhn Robert
• Lenke Tobias
• Gmeiner Wolfgang

Classifications

• B01J8/008

  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

• B01J2208/00884

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

• B01J8/025

  in a cylindrical shaped bed · CPC title

• B01J2208/00814

  the particulate material being provides in prefilled containers · CPC title

• C01B21/265

  characterised by the catalyst · CPC title