Catalyst carrier for exhaust gas purification and catalyst for exhaust gas purification

Patent metadata

Field	Value
Publication number	US-9827556-B2
Application number	US-201214343056-A
Country	US
Kind code	B2
Filing date	Aug 27, 2012
Priority date	Sep 6, 2011
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

Disclosed is an exhaust gas purification catalyst carrier which includes a phosphate salt represented by formula: MPO 4 (wherein M represents Y, La, or Al) or a zirconium phosphate represented by formula ZrP 2 O 7 ; an exhaust gas purification catalyst containing a noble metal at least containing Rh and supported on the carrier; and an exhaust gas purification catalyst product having a catalyst support made of a ceramic or metallic material, and a layer of the exhaust gas purification catalyst, the layer being supported on the catalyst support.

First claim

The invention claimed is:

1. An exhaust gas purification catalyst, comprising:
a carrier; and
a noble metal at least containing Rh deposited on the carrier,
wherein the carrier consists of a zirconium phosphate salt represented by formula ZrP 2 O 7 ; and
the Rh is deposited on the carrier in an amount, as reduced to the mass of metallic Rh and based on the mass of the carrier, of 0.05 to 2 mass %.

2. An exhaust gas purification catalyst product, comprising a catalyst support made of a ceramic or metallic material, and a layer of an exhaust gas purification catalyst as recited in claim 1 , the layer being supported on the catalyst support.

3. An exhaust gas purification catalyst, comprising:
a carrier; and
a noble metal at least containing Rh deposited on the carrier,
wherein the carrier consists of a mixture of a molar amount of SiO 2 powder and a molar amount of a phosphate salt represented by formula:
MPO 4 ,

wherein M represents La;
a molar ratio of the molar amount of phosphate salt relative that of a total molar amount of the molar amount of SiO 2 and the molar amount of the phosphate salt is 5 to 40 mol %; and
the Rh is deposited on the carrier in an amount, as reduced to the mass of metallic Rh and based on the mass of the carrier, of 0.05 to 2 mass %.

4. An exhaust gas purification catalyst product, comprising a catalyst support made of a ceramic or metallic material, and a layer of an exhaust gas purification catalyst as recited in claim 3 , the layer being supported on the catalyst support.

Assignees

• Nagao Yuki
• Sato Takahiro
• Nakahara Yunosuke
• Machida Masato
• Mitsui Mining & Smelting Co

Inventors

• Nagao Yuki
• Sato Takahiro
• Nakahara Yunosuke
• Machida Masato

Classifications

• B01D2255/2061

  Yttrium · CPC title

• B01J27/1856 Primary

  with platinum group metals · CPC title

• B01D53/945

  characterised by a specific catalyst · CPC title

• B01J37/0248

  Coatings comprising impregnated particles · CPC title

• B01J37/03

  Precipitation; Co-precipitation · CPC title