公开(公告)号：US20110171092A1

公开(公告)日：2011-07-14

申请号：US12926786

申请日：2010-12-09

申请人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

发明人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

IPC分类号： B01D53/94 ,  B01J21/06 ,  B01D53/62 ,  B01D53/72 ,  B01D53/56

CPC分类号： C01G25/00 ,  B01D53/945 ,  B01D2255/407 ,  B01D2255/908 ,  B01J23/10 ,  B01J23/63 ,  B01J35/002 ,  B01J35/023 ,  B01J37/0036 ,  B01J37/0081 ,  B01J37/04 ,  C01P2002/72 ,  C01P2004/61 ,  C01P2004/62 ,  Y02T10/22

摘要： 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.

摘要翻译： 本发明涉及一种铈 - 锆基复合氧化物，其可用于例如从内燃机和锅炉等内燃机排放的废气的净化，并可在低温区域释放高水平的氧气， 其制造方法，使用其的氧气储存/释放组分，废气净化催化剂和废气净化方法。 铈锆系复合氧化物满足氧释放开始温度为380℃以下的要求（1），（2）氧释放量为485μmol/ g以上，进一步（3） 在400℃下的氧释放量不小于15μmol/ g。 铈 - 锆基复合氧化物可以通过例如将铈原料和锆原料以预定的混合比混合在一起，在起始原料混合物在熔点以上的温度下熔融， 然后冷却熔体以形成锭，然后任选地研磨锭以制备粉末，随后在加热下除去粉末晶粒内的应变，然后研磨至更细的状态。

公开(公告)号：US07871956B2

公开(公告)日：2011-01-18

申请号：US11717162

申请日：2007-03-13

申请人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

发明人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

IPC分类号： B01J21/06 ,  B01J23/10 ,  C01G25/02 ,  C01B13/14 ,  C01F17/00

CPC分类号： C01G25/00 ,  B01D53/945 ,  B01D2255/407 ,  B01D2255/908 ,  B01J23/10 ,  B01J23/63 ,  B01J35/002 ,  B01J35/023 ,  B01J37/0036 ,  B01J37/0081 ,  B01J37/04 ,  C01P2002/72 ,  C01P2004/61 ,  C01P2004/62 ,  Y02T10/22

摘要： 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.

摘要翻译： 本发明涉及一种铈 - 锆基复合氧化物，其可用于例如从内燃机和锅炉等内燃机排放的废气的净化，并可在低温区域释放高水平的氧气， 其制造方法，使用其的氧气储存/释放组分，废气净化催化剂和废气净化方法。 铈锆系复合氧化物满足氧释放开始温度为380℃以下的要求（1），（2）氧释放量为485μmol/ g以上，进一步（3） 在400℃下的氧释放量不小于15μmol/ g。 铈 - 锆基复合氧化物可以通过例如将铈原料和锆原料以预定的混合比混合在一起，在起始原料混合物在熔点以上的温度下熔融， 然后冷却熔体以形成锭，然后任选地研磨锭以制备粉末，随后在加热下除去粉末晶粒内的应变，然后研磨至更细的状态。

公开(公告)号：US20070155624A1

公开(公告)日：2007-07-05

申请号：US11717162

申请日：2007-03-13

申请人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

发明人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

IPC分类号： B01J23/10

CPC分类号： C01G25/00 ,  B01D53/945 ,  B01D2255/407 ,  B01D2255/908 ,  B01J23/10 ,  B01J23/63 ,  B01J35/002 ,  B01J35/023 ,  B01J37/0036 ,  B01J37/0081 ,  B01J37/04 ,  C01P2002/72 ,  C01P2004/61 ,  C01P2004/62 ,  Y02T10/22

摘要： 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.

摘要翻译： 本发明涉及一种铈 - 锆基复合氧化物，其可用于例如从内燃机和锅炉等内燃机排放的废气的净化，并可在低温区域释放高水平的氧气， 其制造方法，使用其的氧气储存/释放组分，废气净化催化剂和废气净化方法。 铈锆系复合氧化物满足氧释放开始温度为380℃以下的要求（1），（2）氧释放量为485mumol / g以上，进一步（3） 在400℃下的氧释放量不小于15mumol / g。 铈 - 锆基复合氧化物可以通过例如将铈原料和锆原料以预定的混合比混合在一起，在起始原料混合物在熔点以上的温度下熔融， 然后冷却熔体以形成锭，然后任选地研磨锭以制备粉末，随后在加热下除去粉末晶粒内的应变，然后研磨至更细的状态。

公开(公告)号：US08187995B2

公开(公告)日：2012-05-29

申请号：US12926786

申请日：2010-12-09

申请人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

发明人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

IPC分类号： B01J21/06 ,  B01J23/10 ,  C01G25/02 ,  C01B13/14 ,  C01F17/00 ,  F01N3/10

CPC分类号： C01G25/00 ,  B01D53/945 ,  B01D2255/407 ,  B01D2255/908 ,  B01J23/10 ,  B01J23/63 ,  B01J35/002 ,  B01J35/023 ,  B01J37/0036 ,  B01J37/0081 ,  B01J37/04 ,  C01P2002/72 ,  C01P2004/61 ,  C01P2004/62 ,  Y02T10/22

摘要： 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.

摘要翻译： 本发明涉及一种铈 - 锆基复合氧化物，其可用于例如从内燃机和锅炉等内燃机排放的废气的净化，并可在低温区域释放高水平的氧气， 其制造方法，使用其的氧气储存/释放组分，废气净化催化剂和废气净化方法。 铈锆系复合氧化物满足氧释放开始温度为380℃以下的要求（1），（2）氧释放量为485μmol/ g以上，进一步（3） 在400℃下的氧释放量不小于15μmol/ g。 铈 - 锆基复合氧化物可以通过例如将铈原料和锆原料以预定的混合比混合在一起，在起始原料混合物在熔点以上的温度下熔融， 然后冷却熔体以形成锭，然后任选地研磨锭以制备粉末，随后在加热下除去粉末晶粒内的应变，然后研磨至更细的状态。