公开(公告)号：US20140364304A1

公开(公告)日：2014-12-11

申请号：US14366627

申请日：2012-12-18

Applicant: RHODIA OPERATIONS

Inventor： Emmanuel Rohart ,  Naotaka Ohtake

IPC: B01J23/10

CPC classification number: B01J23/10 ,  B01J23/002 ,  B01J35/1014 ,  B01J35/1019 ,  B01J2523/00 ,  C01F17/0043 ,  C01P2002/60 ,  C01P2006/12 ,  C01P2006/13 ,  B01J2523/25 ,  B01J2523/3712 ,  B01J2523/41 ,  B01J2523/3706 ,  B01J2523/48 ,  B01J2523/36 ,  B01J2523/3718 ,  B01J2523/3725 ,  B01J2523/31

Abstract: A composite oxide and a catalyst for purifying exhaust gas using the same are provided, which oxide has excellent heat resistance, including that a large specific surface area is maintained even when the composite oxide is used in a high temperature environment, and that, even after calcination at 800° C. for 2 hours, no AECeO3 phase is detected and increase in CeO2 crystallite size is inhibited. The composite oxide contains, in terms of oxides, 50 to 98 mass % of a cerium-containing element, the cerium-containing element consisting of Ce and at least one element selected from rare earth elements other than Ce and including Y, Zr, and A1, at 85:15 to 100:0 by mass, 1 to 30 mass % of an alkaline earth metal element, and 1 to 20 mass % silicon in terms of SiO2.

Abstract translation: 提供一种复合氧化物和使用其的净化废气的催化剂，该氧化物具有优异的耐热性，即使在复合氧化物在高温环境中使用时也能维持大的比表面积，并且即使在 在800℃下煅烧2小时，不检测到AECeO 3相，并抑制CeO 2微晶尺寸的增加。 复合氧化物以氧化物计含有50〜98质量％的含铈元素，由Ce组成的含铈元素和选自Ce以外的稀土元素中的至少一种元素，包括Y，Zr和 A1，以85:15〜100:0质量％，1〜30质量％的碱土类金属元素和1〜20质量％的硅换算成SiO 2。

公开(公告)号：US20140336043A1

公开(公告)日：2014-11-13

申请号：US14366625

申请日：2012-12-18

Applicant: RHODIA OPERATIONS

Inventor： Emmanuel Rohart ,  Naotaka Ohtake

IPC: B01J23/10

CPC classification number: B01J23/10 ,  B01J23/002 ,  B01J35/1014 ,  B01J2523/00 ,  C01F17/0043 ,  C01P2002/60 ,  C01P2006/12 ,  C01P2006/13 ,  B01J2523/25 ,  B01J2523/31 ,  B01J2523/3712 ,  B01J2523/3706 ,  B01J2523/36 ,  B01J2523/3718 ,  B01J2523/3725 ,  B01J2523/41 ,  B01J2523/48

Abstract: A composite oxide and a catalyst for purifying exhaust gas using the same are provided, which oxide has excellent heat resistance, including that a large specific surface area is maintained even when the composite oxide is used in a high temperature environment, and that, even after calcination at 800° C. for 2 hours, no AECeO3 phase is detected and increase in CeO2 crystallite size is inhibited. The composite oxide contains, in terms of oxides, 60 to 98 mass % of a cerium-containing element, the cerium-containing element consisting of Ce and at least one element selected from rare earth elements other than Ce and including Y, Zr, and Si at 85:15 to 100:0 by mass, 1 to 20 mass % of an alkaline earth metal element, and 1 to 20 mass % aluminum in terms of AI2O3, wherein the composite oxide has properties of exhibiting a specific surface area of not smaller than 40 m2/g as measured by the BET method after calcination at 800° C. for 2 hours, and having no AECeO3 phase and having a CeO2 crystallite size in the (111) plane of not larger than 15 nm, as determined by X-ray diffraction after calcination at 800° C. for 2 hours.

Abstract translation: 提供一种复合氧化物和使用其的净化废气的催化剂，该氧化物具有优异的耐热性，即使在复合氧化物在高温环境中使用时也能维持大的比表面积，并且即使在 在800℃下煅烧2小时，不检测到AECeO 3相，并抑制CeO 2微晶尺寸的增加。 复合氧化物以氧化物计含有60〜98质量％的含铈元素，由Ce组成的含铈元素和选自Ce以外的稀土元素中的至少一种元素，包括Y，Zr和 Si：85:15〜100:0，碱土类金属元素为1〜20质量％，Al 2 O 3为1〜20质量％，其中复合氧化物的比表面积为 在800℃下煅烧2小时后，通过BET法测定，并且在（111）面中具有不大于15nm的AECeO 3相并且具有CeO 2微晶尺寸的小于40m 2 / g，如 在800℃煅烧2小时后进行X射线衍射。

公开(公告)号：US10350578B2

公开(公告)日：2019-07-16

申请号：US14550358

申请日：2014-11-21

Applicant: RHODIA OPERATIONS

Inventor： Olivier Larcher ,  Emmanuel Rohart ,  Simon Ifrah

IPC: B01J23/10 ,  B01D53/94 ,  B01J23/00 ,  B01J37/03 ,  C01F17/00 ,  C01G25/00 ,  C01G25/02 ,  B01J35/02 ,  B01J37/06 ,  B01J37/08 ,  F01N3/10

Abstract: The invention relates to a composition containing zirconium, cerium and yttrium oxides with a cerium oxide proportion of between 3% and 15%, and yttrium oxide proportions corresponding to the following conditions: 6% at most if the cerium oxide proportion is between 12% excluded and 15% included; 10% at most if the cerium oxide proportion is between 7% excluded and 12% included; 30% at most if the cerium oxide proportion is between 3% and 7% included; the balance consisting of zirconium oxide. The composition may optionally include an oxide of a rare earth selected from lanthanum, neodymium and praseodymium. The composition can be used for processing the exhaust gases of a vehicle.