Coating suspension

Patent metadata

Field	Value
Publication number	US-10035134-B2
Application number	US-201515506459-A
Country	US
Kind code	B2
Filing date	Sep 9, 2015
Priority date	Sep 10, 2014
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

The invention relates to a coating suspension containing at least one platinum group metal on a support material, as well as manganese(II) carbonate, and to a method for coating a catalyst support substrate.

First claim

The invention claimed is:

1. A coating suspension comprising at least one platinum group metal on a support material, and manganese(II) carbonate in quantities of 3 to 20 kg/m 3 (from 3 to 20g/L) with respect to the volume of a catalyst support substrate to be coated.

2. The coating suspension according to claim 1 , comprising at least one of platinum, palladium, and rhodium as a platinum group metal.

3. The coating suspension according to claim 1 , comprising platinum and palladium or platinum alone as platinum group metals.

4. The coating suspension according to claim 1 , comprising platinum and palladium in ratio of 15:1 to 1:5 as platinum group metals.

5. The coating suspension according claim 1 , comprising aluminum oxide, rare-earth doped aluminum oxide, silicon dioxide, titanium dioxide, cerium oxide, aluminum-silicon mixed oxides, cerium-zirconium mixed oxides or rare-earth doped cerium-zirconium mixed oxides as support material.

6. The coating suspension according to claim 1 , comprising aluminum oxide stabilized with 1 to 6 wt % La 2 O 3 as support material.

7. The coating suspension according to claim 1 , comprising one or more zeolite compounds.

8. A coating suspension comprising at least one platinum group metal on a support material and manganese(II) carbonate, and one or more zeolite compounds selected from group consisting of zeolite β (zeolite beta), zeolite Y, ZSM-5, and mixture of two or more thereof.

9. The coating suspension according to claim 8 , comprising at least one of platinum, palladium, and rhodium as a platinum group metal.

10. The coating suspension according to claim 8 , comprising platinum and palladium or platinum alone as platinum group metals.

11. The coating suspension according to claim 8 , comprising platinum and palladium in a ratio of 15:1 to 1:5 as platinum group metals.

12. The coating suspension according claim 8 , comprising aluminum oxide, rare-earth doped aluminum oxide, silicon dioxide, titanium dioxide, cerium oxide, aluminum-silicon mixed oxides, cerium-zirconium mixed oxides, or rare-earth earth doped cerium-zirconium mixed oxides as support material.

13. A method for coating a catalyst support substrate with a coating having a hydrogen sulfide blocking function and an oxidation function, the method comprising bringing the catalyst support substrate into contact with a coating suspension containing at least one platinum group metal on a support material and manganese (II) carbonate, and then drying and calcining the catalyst support substrate.

14. The method according to claim 13 , wherein a monolithic through-flow honeycomb structure made of ceramic or metal is used as the catalyst support substrate.

15. The method according to claim 13 , wherein a ceramic through-flow honeycomb structure or a ceramic wall-flow filter substrate made of cordierite, aluminum titanate, or silicon carbide is used as the catalyst support substrate.

16. A coating suspension comprising at least one platinum group metal on a support material and manganese(II) carbonate, and wherein the coating suspension comprises aluminum oxide stabilized with 1 to 6 wt % La 2 O 3 as support material.

17. The coating suspension according to claim 16 , comprising one or more zeolite compounds selected from the group consisting of zeolite β (zeolite beta), zeolite Y, ZSM-5, and mixtures of two or more thereof.

18. The coating suspension according to claim 16 , comprising platinum and palladium in a ratio of 15:1 to 1:5 as platinum group metals.

19. The method according to claim 13 , wherein the coating suspension comprises manganese(II) carbonate in quantities of 3 to 20 kg/m 3 (from 3 to 20 g/L) with respect to the volume of the catalyst support substrate to be coated.

20. The method according to claim 19 , wherein the coating suspension comprises platinum and palladium or platinum alone as platinum group metals and one or more zeolite compounds.

Assignees

• Umicore Ag & Co Kg

Inventors

• Dornhaus Franz
• Schiffer Michael

Classifications

• B01D53/944

  Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts (three-way-catalysts [TWC] B01D53/9445) · CPC title

• F01N3/2842

  specially adapted for monolithic supports, e.g. of honeycomb type (F01N3/2853 - F01N3/2871 take precedence) · CPC title

• B01D2255/1023

  Palladium · CPC title

• B01J29/126

  Y-type faujasite · CPC title

• B01D2255/1025

  Rhodium · CPC title