| Patent application number | Description | Published |
|---|
| 20090010815 | HEXAGONAL-CELL HONEYCOMB CATALYZER FOR PURIFYING EXHAUST GAS - A hexagonal-cell honeycomb catalyzer is for purifying an exhaust gas. The catalyzer comprising a support that has a plurality of cells and a purification layer that has an HC absorption layer and a three-way catalyst layer. The HC absorption layer is formed on the honeycomb-formed surface of each wall of the support. The three-way catalyst layer is formed on the surface of the HC absorption layer. Provided that the HC absorption layer has a thickness a | 01-08-2009 |
| 20090036300 | EXHAUST GAS-PURIFYING CATALYST - An exhaust gas-purifying catalyst ( | 02-05-2009 |
| 20090131251 | EXHAUST GAS-PURIFYING CATALYST - An exhaust gas-purifying catalyst is less prone to cause a decrease in its activity even when used in a high temperature atmosphere containing oxygen at a high concentration. The exhaust gas-purifying catalyst includes a composite oxide and Pd or a second solid solution of a composite and Rh and/or Pt. The first and second solid solutions have perovskite structure and are represented by ABO | 05-21-2009 |
| 20090181847 | EXHAUST GAS-PURIFYING CATALYST - Decreasing HC emission is made possible. An exhaust gas-purifying catalyst includes a substrate, a hydrocarbon-adsorbing layer covering the substrate, and a catalytic layer covering the hydrocarbcn-adsorbing layer. The catalytic layer includes a layered structure of a first catalytic layer including a precious metal and a carrier supporting it, and a second catalytic layer including the same precious metal as the precious metal of the first catalytic layer and a carrier supporting it and having a concentration of the precious metal higher than that in the first catalytic layer. | 07-16-2009 |
| 20090209408 | Exhaust Gas-Purifying Catalyst - A high exhaust gas-purifying efficiency is achieved. An exhaust gas-purifying catalyst includes a substrate, an oxygen storage layer covering the substrate and including an oxygen storage material, and a catalytic layer covering the oxygen storage layer and including palladium, rhodium and a carrier supporting them, the catalytic layer having a precious metal concentration higher than that of the oxygen storage layer. | 08-20-2009 |
| 20100004122 | Exhaust Gas-Purifying Catalyst | 01-07-2010 |
| 20100004123 | OXYGEN STORAGE MATERIAL - An excellent oxygen storage capacity is achieved even in the case used for a long period of time under high temperature conditions. An oxygen storage material contains a first particle made of a composite oxide of cerium and zirconium or a composite oxide of cerium, a rare-earth element other than cerium and zirconium, a second particle including a composite oxide of a rare-earth element, an alkaline-earth element and zirconium, and a precious metal. A part of the precious metal forms a solid solution with the composite oxide included in the second particle. | 01-07-2010 |
| 20100087314 | Exhaust Gas-Purifying Catalyst - A high exhaust gas-purifying performance is achieved. An exhaust gas-purifying catalyst includes a substrate, a lower layer covering the substrate and including an oxygen storage material and palladium, and an upper layer covering the lower layer and including rhodium and a carrier supporting it. The lower layer is rhodium-free. The upper layer has an oxygen storage capacity lower than that of the lower layer. | 04-08-2010 |
| 20110082032 | EXHASUT GAS PURIFYING CATALYST - An exhaust gas purifying catalyst comprises a substrate having a through hole serving as a passage for exhaust gas; and a catalyst coating layer formed on an internal surface of the through hole. The catalyst coating layer contains: a component (i): a precious metal; and a component (ii): at least one of a Zr oxide, a Ce oxide and a ZrCe mixed oxide. On an upstream portion of the passage, an oxide equivalent weight of Zr is within a range of 51-100 wt % of an oxide equivalent weight of Zr and Ce contained in the component (ii). On a downstream portion of the passage, the component (ii) includes at least one of a Ce oxide and a ZrCe mixed oxide in which an oxide equivalent weight of Ce is within a range of 58-100 wt % of an oxide equivalent weight of Zr and Ce contained in the ZrCe mixed oxide. | 04-07-2011 |
| 20110111949 | EXHAUST GAS-PURIFYING CATALYST - Provided is an exhaust gas-purifying catalyst excelling in an exhaust gas-purifying performance. The exhaust gas-purifying catalyst contains a substrate, and a catalyst layer formed on the substrate and containing a precious metal and praseodymium. | 05-12-2011 |
