METHOD FOR DISSOLVING SPENT CATALYST

PURPOSE:To provide a method for dissolving a spent catalyst completely and efficiently in the case of dissolving the spent catalyst wherein alumina is mainly incorporated in a carrier. CONSTITUTION:Deoiling treatment is previously performed for a spent catalyst in accordance with necessity. Thereaft...

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Main Authors KIRISHIMA KENJI, NAKANO YUSHI, SHIMAUCHI HISAAKI, MATSUNAGA ICHIRO, TOYABE KEIJI, SHIBAYAMA HARUO
Format Patent
LanguageEnglish
Published 01.11.1994
Edition5
Subjects
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
DISPOSAL OF SOLID WASTE
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
RECLAMATION OF CONTAMINED SOIL SOIL
THEIR RELEVANT APPARATUS
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:PURPOSE:To provide a method for dissolving a spent catalyst completely and efficiently in the case of dissolving the spent catalyst wherein alumina is mainly incorporated in a carrier. CONSTITUTION:Deoiling treatment is previously performed for a spent catalyst in accordance with necessity. Thereafter, the spent catalyst is roasted at the temperature not lower than the temperature wherein any one of oil, sulfur or carbon remaining in the spent catalyst is ignited and burned at the temperature not higher than 1000 deg.C. Then, metal for a dissolving catalyst is added to the obtained burned material and dissolved by sulfuric acid.
Bibliography:Application Number: JP19940040502