公开(公告)号：US11040332B2

公开(公告)日：2021-06-22

申请号：US14119264

申请日：2012-05-28

申请人： Naotaka Ohtake ,  Keiichiro Mitsuoka ,  Kazuhiko Yokota

发明人： Naotaka Ohtake ,  Keiichiro Mitsuoka ,  Kazuhiko Yokota

IPC分类号： B01J21/00 ,  B01J23/10 ,  B01D53/94 ,  B01J35/10 ,  B01J37/02 ,  B01J37/03 ,  B01J21/08 ,  C01F17/32 ,  B01J23/00 ,  B01J25/00 ,  B01J29/00 ,  F01N3/10

摘要： Provided are: a complex oxide that exhibits high redox ability even at low temperatures, has excellent heat resistance, and stably retains these characteristics even on repeated oxidation and reduction at high temperature; a method for producing the same; and an exhaust gas purification catalyst. The inventive complex oxide contains more than 0 but no more than 20 parts by mass of Si, calculated as SiO2, per total 100 parts by mass of rare earth metal elements including Ce, calculated as oxides; and has a characteristic such that when it is subjected to temperature-programmed reduction (TPR) measurement in a 10% hydrogen-90% argon atmosphere at from 50° C. to 900° C. with the temperature increasing at a rate of 10° C./min, followed by oxidation treatment at 500° C. for 0.5 hours, and then temperature-programmed reduction measurement is performed again, its calculated reduction rate at and below 400° C. is at least 1.5%.

公开(公告)号：US20140187415A1

公开(公告)日：2014-07-03

申请号：US14119270

申请日：2012-05-28

申请人： Naotaka Ohtake ,  Keiichiro Mitsuoka ,  Kazuhiko Yokota

发明人： Naotaka Ohtake ,  Keiichiro Mitsuoka ,  Kazuhiko Yokota

IPC分类号： B01J23/10

CPC分类号： B01J23/10 ,  B01D53/945 ,  B01D2255/2063 ,  B01D2255/2065 ,  B01D2255/2066 ,  B01D2255/20715 ,  B01D2255/2092 ,  B01D2255/30 ,  B01D2255/40 ,  B01D2255/407 ,  B01D2255/908 ,  B01D2255/9207 ,  B01J21/066 ,  B01J35/1014 ,  C01F17/0018 ,  C01F17/0043 ,  C01P2002/50 ,  C01P2006/12 ,  C01P2006/90 ,  Y02T10/22

摘要： Provided are: a complex oxide that exhibits high redox ability even at low temperatures, has excellent heat resistance, and stably retains these characteristics even on repeated oxidation and reduction at high temperature; a method for producing the same; and an exhaust gas purification catalyst. The inventive complex oxide contains Ce; rare earth metal element other than Ce, including Y; Al and/or Zr; and Si; such that the Ce, and said other elements other than Ce and Si, are present in a mass ratio of 85:15-99:1, calculated as oxides; and has a characteristic such that when it is subjected to temperature-programmed reduction (TPR) measurement in a 10% hydrogen-90% argon atmosphere at from 50° C. to 900° C. with the temperature increasing at a rate of 10° C./min, followed by oxidation treatment at 500° C. for 0.5 hours, and then temperature-programmed reduction measurement is performed again, its calculated reduction rate at and below 400° C. is at least 2.0%.

摘要翻译： 提供：即使在低温下也显示出高氧化还原能力的复合氧化物，具有优异的耐热性，并且即使在高温下反复氧化还原也能稳定地保持这些特性; 其制造方法; 和废气净化催化剂。 本发明的复合氧化物含有Ce; Ce以外的稀土金属元素，包括Y; Al和/或Zr; 和Si; 使得Ce和除Ce和Si以外的所述其它元素以85:15-99:1的质量比存在，以氧化物计算; 并且具有这样的特征，使得当其在50℃至900℃的10％氢-90％氩气氛中进行温度程序化还原（TPR）测量时，温度以10°的速度增加 然后在500℃下氧化处理0.5小时，然后再次进行温度程度的还原测量，其在400℃以下的计算的还原率为至少2.0％。

公开(公告)号：US20140179515A1

公开(公告)日：2014-06-26

申请号：US14119264

申请日：2012-05-28

申请人： Naotaka Ohtake ,  Keiichiro Mitsuoka ,  Kazuhiko Yokota

发明人： Naotaka Ohtake ,  Keiichiro Mitsuoka ,  Kazuhiko Yokota

IPC分类号： B01J23/10

CPC分类号： B01J23/10 ,  B01D53/94 ,  B01D53/945 ,  B01D2255/2061 ,  B01D2255/2063 ,  B01D2255/2065 ,  B01D2255/2066 ,  B01D2255/2068 ,  B01D2255/30 ,  B01D2255/40 ,  B01D2255/908 ,  B01D2255/9207 ,  B01J21/08 ,  B01J35/1004 ,  B01J35/1014 ,  B01J37/0201 ,  B01J37/031 ,  C01F17/0018 ,  C01P2002/50 ,  C01P2002/54 ,  C01P2006/13 ,  C01P2006/90 ,  F01N3/10 ,  Y02T10/22

摘要： Provided are: a complex oxide that exhibits high redox ability even at low temperatures, has excellent heat resistance, and stably retains these characteristics even on repeated oxidation and reduction at high temperature; a method for producing the same; and an exhaust gas purification catalyst. The inventive complex oxide contains more than 0 but no more than 20 parts by mass of Si, calculated as SiO2, per total 100 parts by mass of rare earth metal elements including Ce, calculated as oxides; and has a characteristic such that when it is subjected to temperature-programmed reduction (TPR) measurement in a 10% hydrogen-90% argon atmosphere at from 50° C. to 900° C. with the temperature increasing at a rate of 10° C./min, followed by oxidation treatment at 500° C. for 0.5 hours, and then temperature-programmed reduction measurement is performed again, its calculated reduction rate at and below 400° C. is at least 1.5%.

摘要翻译： 提供：即使在低温下也显示出高氧化还原能力的复合氧化物，具有优异的耐热性，并且即使在高温下反复氧化还原也能稳定地保持这些特性; 其制造方法; 和废气净化催化剂。 本发明的复合氧化物以氧化物计，含有超过0但不超过20质量份的Si，以SiO 2计，每100质量份包括Ce的稀土金属元素; 并且具有这样的特征，使得当其在50℃至900℃的10％氢-90％氩气氛中进行温度程序化还原（TPR）测量时，温度以10°的速度增加 然后在500℃下氧化处理0.5小时，然后再次进行温度程度的还原测量，其在400℃以下的计算的还原率为至少1.5％。