Cerium-base quaternary nano level composite RE oxide and its prepn process |
Title： |
| Cerium-base quaternary nano level composite RE oxide and its prepn process |
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Application Number： |
02130891 |
Application Date： |
2002/10/15 |
Announcement Date： |
2003/03/19 |
Pub. Date： |
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Publication Number： |
1403376 |
Announcement Number： |
1206026 |
Grant Date： |
2005-6-15 |
Granted Pub. Date： |
2005-6-15 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
B01J 23/10, B01D 53/94, C01F 17/00, C01G 25/02 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Wen Mingfen, Yu Bo, Song Chongli |
Key Words： |
Cerium-base, quaternary nano level, composite RE oxide, prepn process |
Abstract： |
The composite RE oxide of the present invention is the solid solution comprising CeO2 20-40 wt%, ZrO2 50-70 wt%, La2O3 1-10 wt% and Pr6O11 1-5 wt%. The present invention is prepared with inorganic salt as material and through sol-gel process and codeposition process and the processes are carried out at normal temperature and produces no Three-Waste. Low temperature and high temperature heat treatment shows that the composite RE oxide has specific surface area and high temperature stability obviously improved compared with available technology. The composite RE oxide may be used in various catalytic process, especially in purifying tail gas of automobile. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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