| DAIICHI KIGENSO KAGAKU KOGYO CO., LTD. Patent applications |
| Patent application number | Title | Published |
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| 20110274603 | EXHAUST GAS PURIFICATION CATALYST, EXHAUST GAS PURIFICATION APPARATUS USING THE SAME AND EXHAUST GAS PURIFICATION METHOD - An exhaust gas purification catalyst, which is suitable as a Three Way Catalyst for efficiently purifying carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NO | 11-10-2011 |
| 20110171092 | Cerium/zirconium-base composite oxide, method for producing the same, oxygen storage/release component using said cerium-zirconium-base composite oxide, exhaust gas purification catalyst, and exhaust gas purification method using the same - This invention relates to a cerium—zirconium-base composite oxide, which is useful, e.g., for the purification of exhaust gas discharged from combustion engines such as internal combustion engines and boilers and can release a high level of oxygen in a low temperature region, a method for producing the same, an oxygen storage/release component using the same, an exhaust gas purification catalyst, and an exhaust gas purification method. The cerium—zirconium-base composite oxide satisfies requirements (1) that the oxygen release initiation temperature is 380° C. or below, (2) that the oxygen release amount is not less than 485 μmol/g, and further (3) that the oxygen release amount at 400° C. is not less than 15 μmol/g. The cerium—zirconium-base composite oxide can be produced, for example, by mixing a starting material for cerium and a starting material for zirconium at a predetermined mixing ratio together, melting the starting material mixture at a temperature at or above the melting point, then cooling the melt to form an ingot, then optionally grinding the ingot to prepare powder, subsequently removing strain within powder crystal grains under heating, and then grinding to a further fine state. | 07-14-2011 |
| 20110133119 | NICKEL OXIDE-STABILIZED ZIRCONIA COMPOSITE OXIDE, PROCESS FOR PRODUCTION THEREOF, AND ANODE FOR SOLID OXIDE TYPE FUEL CELL COMPRISING THE COMPOSITE OXIDE - The present invention relates to a nickel oxide-stabilized zirconia composite in which nickel oxide is dispersed uniformly, a process for readily producing the composite oxide, and an anode for a solid oxide fuel cell having excellent output characteristics. | 06-09-2011 |
| 20110113754 | EXHAUST GAS PURIFICATION CATALYST, EXHAUST GAS PURIFICATION APPARATUS USING THE SAME AND EXHAUST GAS PURIFICATION METHOD - An exhaust gas purification catalyst, which is suitable as a Three way catalyst for efficiently purifying carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NO | 05-19-2011 |
| 20110071017 | CERIUM OXIDE-ZIRCONIUM OXIDE-BASED MIXED OXIDE AND METHOD FOR PRODUCING THEREOF - The present invention provides a cerium oxide-zirconium oxide-based mixed oxide having superior platinum dispersibility and a suitable OSC, and a simple production process thereof. The cerium oxide-zirconium oxide-based mixed oxide comprises cerium oxide and zirconium oxide, wherein (1) the weight ratio of CeO | 03-24-2011 |
| 20100240519 | Colored Zirconia-Based Sintered Body and Manufacturing Method Thereof and Decorative Member - This invention provides a colored zirconia-based sintered body, mainly composed of zirconia containing a stabilizer, which contains alumina and nickel spinel, and has a novel color tone, and a method for manufacturing such a zirconia-based sintered body. The colored zirconia-based sintered body is applicable not only to a highly decorative product such as a watch, but also to knives, tweezers, machining jigs and holding jigs for electronic parts, and sliding members. | 09-23-2010 |
| 20100061903 | CATALYST SYSTEM TO BE USED IN AUTOMOBILE EXHAUST GAS PURIFICATION APPARATUS, EXHAUST GAS PURIFICATION APPARATUS USING THE SAME AND EXHAUST GAS PURIFICATION METHOD - A catalyst system to be used in an automobile exhaust gas purification apparatus which exerts excellent purification capability to a nitrogen oxide, even when hydrocarbon concentration varies, by subjecting exhaust gas discharged from an automotive internal engine to contacting with a catalyst, an exhaust gas purification apparatus using the same, and an exhaust gas purification method. | 03-11-2010 |
| 20100021364 | CERIUM-ZIRCONIUM MIXED OXIDE AND METHOD FOR MANUFACTURING THE SAME - A cerium-zirconium mixed oxide with improved heat resistance of the specific surface area at a high temperature (1000° C.) is provided along with a manufacturing method therefor. This cerium-zirconium mixed oxide comprises of spherical particles 5 to 20 nm in size and rodlike particles 5 to 20 nm in diameter and to 150 nm in length, and preferably has a pore volume of 0.3 cm | 01-28-2010 |
| 20090305878 | ZIRCONIUM OXALATE SOL - A sol of the present invention is a sol comprising zirconium oxalate compound as a dispersoid, wherein a mol ratio of oxalic acid to Zr (oxalic acid/Zr) is from 1.2 to 3 and a particle diameter D50 of the dispersoid is from 10 to 100 nm. This sol is produced by adding oxalic acid to a dispersion liquid of zirconium hydroxide, and the addition of oxalic acid is carried out in twice. | 12-10-2009 |
| 20090081101 | YTTRIA-STABILIZED ZIRCONIA SINTERED BODY AND METHOD FOR PRODUCING THE SAME - To provide an yttria-stabilized zirconia sintered body having high hydrothermal deterioration resistance in addition to excellent thermal shock resistance. | 03-26-2009 |
| 20080312075 | ZIRCONIA POROUS BODY AND MANUFACTURING METHOD THEREOF - A zirconia porous body with excellent stability of heat resistance is manufactured. This relates to a zirconia porous body having peaks at pore diameters of 8 to 20 nm and 30 to 100 nm in a pore distribution based on the BJH method, with a total pore volume of 0.4 cc/g or more, and to a zirconia porous body having a peak at a pore diameters of 20 to 110 nm in a pore distribution based on the BJH method, with a total pore volume of 0.4 cc/g or more. | 12-18-2008 |
