FIELD: technological processes.
SUBSTANCE: invention relates to a method of producing calcined mixed oxide containing oxides of Al, Ce and Zr. Method includes following stages: (a) providing an aqueous slurry comprising hydroxides of cerium and zirconium and additionally containing one or more rare-earth metal hydroxides, other than cerium, (b) contacting cerium and zirconium hydroxides with boehmite of formula (AlO(OH)×H2O), to obtain an aqueous suspension of solid particles, (c) separating solid particles from aqueous suspension and drying to obtain a solid composition, and (d) calcining solid composition from step (c) at temperature from 450 to 1,200 °C for at least one hour, to obtain a calcined mixed oxide. Also disclosed is a calcined mixed oxide.
EFFECT: invention enables to obtain a calcined mixed oxide with improved thermal stability.
11 cl, 32 ex
| Title | Year | Author | Number |
|---|---|---|---|
| COMPOSITION OF CERIUM DIOXIDE - ZIRCONIUM DIOXIDE - ALUMINIUM DIOXIDE WITH IMPROVED THERMAL STABILITY | 2012 |
|
RU2631511C2 |
| METHOD OF PRODUCING COMPOSITE MATERIALS FROM ALUMINIUM OXIDE AND MIXED OXIDES OF CERIUM AND ZIRCONIUM | 2012 |
|
RU2590162C2 |
| POROUS INORGANIC COMPOSITE OXIDE | 2011 |
|
RU2606505C2 |
| AQUEOUS NP-DISPERSION BASED ON ZIRCONIUM OXIDE FOR APPLICATION IN COATINGS OF FILTER SUBSTRATES | 2019 |
|
RU2796009C2 |
| MIXED OXIDE BASED ON CERIUM AND ZIRCONIUM | 2017 |
|
RU2753046C2 |
| MIXED CERIUM AND ZIRCONIUM OXIDES | 2016 |
|
RU2707888C1 |
| INORGANIC COMPOSITE OXIDES AND METHODS FOR PRODUCTION THEREOF | 2014 |
|
RU2698674C2 |
| COMPOSITIONS BASED ON ZIRCONIUM OXIDE USED AS TERNARY CATALYSTS | 2016 |
|
RU2727187C2 |
| COATED COMPOSITE CONTAINING AlO-CeO/ZrO, AND METHOD FOR PRODUCTION THEREOF | 2015 |
|
RU2699652C2 |
| METHOD OF PREPARING CATALYST FOR PURIFICATION OF EXHAUST GASES OF COMBUSTION ENGINES AND CATALYST OBTAINED THEREOF | 2012 |
|
RU2502561C1 |
