	US 12,350,657 B2
	Precious metal grid for catalyzing gas phase reactions
Dirk Born, Langenselbold (DE); Artur Wiser, Frankfurt (DE); and Stefan Zeuner, Bad Homburg v.d.H. (DE)
Assigned to UMICORE AG & CO. KG, Hanau-Wolfgang (DE)
Appl. No. 17/996,045
Filed by UMICORE AG & CO. KG, Hanau-Wolfgang (DE)
PCT Filed Apr. 22, 2021, PCT No. PCT/EP2021/060547 § 371(c)(1), (2) Date Oct. 12, 2022, PCT Pub. No. WO2021/214232, PCT Pub. Date Oct. 28, 2021.
Claims priority of application No. 20170800 (EP), filed on Apr. 22, 2020.
Prior Publication US 2023/0226534 A1, Jul. 20, 2023
Int. Cl. B01J 35/06 (2006.01); B01J 23/46 (2006.01); B01J 35/00 (2024.01); B01J 35/30 (2024.01); B01J 35/58 (2024.01); B01J 37/00 (2006.01); C01B 21/26 (2006.01)

CPC B01J 35/58 (2024.01) [B01J 23/464 (2013.01); B01J 35/19 (2024.01); B01J 35/396 (2024.01); B01J 37/0009 (2013.01); C01B 21/265 (2013.01)]

12 Claims

1. A wire consisting of platinum group metals for producing grid catalysts containing at least platinum and rhodium, wherein the wire is made as a sheath wire and consists of a core and one or more sheaths arranged one over the other outwards from the core in a radially symmetrical manner, and the rhodium concentration in the outermost sheath is lower than the rhodium concentration in the

core, if the sheath wire only consists of a core and a sheath, or

sheath, if the sheath wire consists of a core and two or more sheaths,

arranged directly under the outermost sheath, and the rhodium concentration in the outermost sheath is 1 wt % to 3 wt %, and the rhodium concentration in the sheath or core arranged under the outermost sheath is in the range of 5 wt % to 20 wt %, and the thickness of the outermost sheath is 1 μm to 10 μm.