REDUCING CATALYST AND ITS PRODUCTION

PROBLEM TO BE SOLVED: To obtain a reducing catalyst consisting of a chromium oxide having improved catalyst activity, and to provide a process for producing the same. SOLUTION: (1) This reducing catalyst consists of a chromium oxide crystal of <=2 nm in the thickness of the amorphous layers exist...

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Bibliographic Details
Main Authors KIYONO KENICHI, KATSUMURA NAOKO, YOKOYAMA TOSHIHARU
Format Patent
LanguageEnglish
Published 25.01.2000
Edition7
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
APPARATUS THEREFOR
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:PROBLEM TO BE SOLVED: To obtain a reducing catalyst consisting of a chromium oxide having improved catalyst activity, and to provide a process for producing the same. SOLUTION: (1) This reducing catalyst consists of a chromium oxide crystal of <=2 nm in the thickness of the amorphous layers existing on the surfaces of primary particles or its molding and (2) the heating up time from 200 deg.C up to a heat treatment temp. is regulated to <=2 hours at the time of heat treating chromium hydroxide or its molding at >=400 deg.C.
Bibliography:Application Number: JP19980214813