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    • 1. 发明专利
    • Method for producing metal oxide
    • 生产金属氧化物的方法
    • JP2003313011A
    • 2003-11-06
    • JP2002120941
    • 2002-04-23
    • Toyota Central Res & Dev Lab IncToyota Motor Corpトヨタ自動車株式会社株式会社豊田中央研究所
    • ISHIBASHI KAZUNOBUITO YUSUKESUDA AKIHIKOSOFUGAWA HIDEOTAKAHASHI NAOKI
    • B01D53/94B01J23/42B01J23/63B01J37/08C01B13/18C01F7/30C01G25/00
    • PROBLEM TO BE SOLVED: To provide a method for producing a metal oxide suitable for use as a catalyst carrier of a catalyst for cleaning of exhaust gas of an internal combustion engine and maintaining a large specific surface area with age and to provide a method for producing a multiple metal oxide having a widely selective composition and a large specific surface area. SOLUTION: In the method for producing a metal oxide, a solution prepared by dissolving at least one metal compound is impregnated into a porous material having pores and reducible to ashes, and after firing in a non-oxidizing atmosphere the porous material is burned and removed. Preferably the pores have 2-40 nm average pore diameter. When the multiple metal oxide is produced, preferably a solution prepared by dissolving at least two metal compounds is impregnated into the above porous material and the porous material is exposed to gaseous ammonia and fired in a non-oxidizing atmosphere. In the case where the metal compound is an aluminum compound, α-alumina is produced. COPYRIGHT: (C)2004,JPO
    • 解决问题的方法:提供适合用作内燃机的排气净化用催化剂的催化剂载体的金属氧化物的制造方法,并且随着时效维持大的比表面积, 具有广泛选择性组成和大比表面积的多金属氧化物的制造方法。 解决方案:在金属氧化物的制造方法中,将通过溶解至少一种金属化合物制备的溶液浸渍到具有孔隙并可还原成灰分的多孔材料中,并且在非氧化性气氛中烧成多孔材料 烧毁 优选孔具有2-40nm平均孔径。 当制备多重金属氧化物时,优选将通过溶解至少两种金属化合物制备的溶液浸渍到上述多孔材料中,并将多孔材料暴露于气态氨并在非氧化性气氛中烧制。 在金属化合物为铝化合物的情况下,制造α-氧化铝。 版权所有(C)2004,JPO
    • 8. 发明专利
    • Oxygen storing/release material
    • 氧气储存/释放材料
    • JP2005125317A
    • 2005-05-19
    • JP2004284619
    • 2004-09-29
    • Toyota Central Res & Dev Lab IncToyota Motor Corpトヨタ自動車株式会社株式会社豊田中央研究所
    • HATANAKA YOSHIOYOKOTA KOJISOFUGAWA HIDEOSUDA AKIHIKOMORIKAWA AKIRAYAMAMOTO TOSHIOARAKAWA KENJIKUNO HISASHI
    • B01J20/06B01J23/745B01J32/00
    • PROBLEM TO BE SOLVED: To provide an oxygen storing/release material which can develop a high level of oxygen storing/release capability without use of any noble metal such as Pt and, at the same time, is inexpensive. SOLUTION: This oxygen storing/release material comprises a ceria-containing carrier and iron oxide as active species contained in the carrier. A reduction reaction of Fe 2 O 3 occurs at a lower temperature than a reduction reaction of CeO 2 . Prior to CeO 2 , Fe 2 O 3 is reduced to Fe 3 O 4 , FeO or Fe, and, in a reducing atmosphere, oxygen transfer from the carrier to the active species "Fe" is accelerated. In an oxidizing atmosphere, independently of the presence of the active species, an oxidation reaction of the active species and the carrier proceeds very rapidly, and the carrier, in which the amount of oxygen is insufficient, takes in oxygen from the atmosphere. Further, the oxygen storing/release capability of the iron oxide per se is also added, and, consequently, a high level of oxygen storing/release capability can be developed. COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供一种可以在不使用任何贵金属如Pt的情况下产生高水平的氧气储存/释放能力的氧气储存/释放材料,并且同时是便宜的。 解决方案:该氧气储存/释放材料包含载体中含有的含有二氧化铈的载体和氧化铁作为活性物质。 在比CeO SB 2还原反应更低的温度下进行Fe O 3 的还原反应。 在CeO 2 之前,将Fe 2 3 还原成Fe 3 SB SB > FeO或Fe,并且在还原气氛中,从载体向活性物质“Fe”的氧转移加速。 在氧化气氛中,与活性物质的存在无关,活性物质和载体的氧化反应非常迅速地进行,氧气量不足的载体从大气中吸收氧气。 此外,还添加氧化铁本身的氧气储存/释放能力,因此,可以开发高水平的氧气储存/释放能力。 版权所有(C)2005,JPO&NCIPI