Invention Grant
- Patent Title: High specific surface/reducibility catalyst/catalyst support compositions comprising oxides of zirconium, cerium and lanthanum and of yttrium, gadolinium or samarium
- Patent Title (中): 包含锆,铈和镧以及钇,钆或钐氧化物的高比表面/还原性催化剂/催化剂载体组合物
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Application No.: US12300845Application Date: 2007-05-07
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Publication No.: US08728435B2Publication Date: 2014-05-20
- Inventor: Olivier Larcher , Emmanuel Rohart , Stephan Verdier
- Applicant: Olivier Larcher , Emmanuel Rohart , Stephan Verdier
- Applicant Address: FR Aubervilliers
- Assignee: Rhodia Operations
- Current Assignee: Rhodia Operations
- Current Assignee Address: FR Aubervilliers
- Agency: Dentons US LLP
- International Application: PCT/EP2007/054397 WO 20070507
- International Announcement: WO2007/131901 WO 20071122
- Main IPC: C01G25/02
- IPC: C01G25/02 ; B01J23/00 ; B01J23/10

Abstract:
Catalyst/catalyst support composition essentially consist of oxides of zirconium, cerium and lanthanum and of another rare earth selected from among yttrium, gadolinium and samarium, having a proportion of the lanthanum oxide and the oxide of the other rare earth of at least 15% and specific surfaces of at least 40 m2/g and at least 15 m2/g after calcination respectively for 4 hours at 1,000° C. and 10 hours at 1,150° C.; after calcination for 10 hours at 1,200° C. these have a surface of at least 7 m2/g and such surface is at least 5 m2/g for an embodiment in which after 10 hours of calcination at 1,150° C. the composition is in the form of a pure solid solution.
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