PROCESS FOR PREPARING ACTIVE ALUMINA

The invention relates to a process for preparing active alumina by mixing two components containing Al2O3, adding diluted nitric acid to the resulting mixture, extruding the paste so obtained, and drying and roasting it. The extruding, drying and roasting steps take place in an externally air-heated...

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Bibliographische Detailangaben
Hauptverfasser: COICIU RODICA, RUSSU ANA, OLARU ILIE, RUSSU RADU
Format: Patent
Sprache:eng ; rum
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Zusammenfassung:The invention relates to a process for preparing active alumina by mixing two components containing Al2O3, adding diluted nitric acid to the resulting mixture, extruding the paste so obtained, and drying and roasting it. The extruding, drying and roasting steps take place in an externally air-heated vertical reactor. The heating and volume flow rates have specific values for preset temperature ranges. Invenţia se referă la un procedeu de obţinere a unei alumine active prin amestecarea a doi componenţi cu conţinut de AlO, adăugarea de acid azotic, diluat, amestecului rezultat, extrudarea pastei obţinute, urmată de uscare şi calcinare. Etapele de extrudare, uscare şi calcinare au loc într-un reactor vertical, încălzit cu aer în exterior. Vitezele de încălzire şi vitezele volumare au valori specifice unor domenii de temperatură prestabilite.