Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Reexamination Certificate
2002-10-30
2008-09-30
Nguyen, Cam N. (Department: 1793)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
C502S256000, C502S263000, C502S320000, C502S407000, C502S415000, C502S439000
Reexamination Certificate
active
07429366
ABSTRACT:
A solution of a chromium compound is impregnated into a silica-alumina carrier made of alumina and containing 1 to 5 weight % of silica relative to the weight of the carrier, thereby to obtain a decomposing catalyst carrying 10 to 15 weight % of chromium oxide relative to the weight of the catalyst in terms of Cr2O3. By contacting mixed gas obtained through partial oxidation of heavy oil and/or coal with the decomposing catalyst, COS and HCN contained in the mixed gas are decomposed/removed. In this case, transition of alumina into boehmite can be suppressed owing to coexistence of silica and chromium oxide, so that COS and HCN can be decomposed by highly active catalytic reactions over a long time.
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Egami Kazutaka
Hosoya Eiichi
Ishigaki, legal representative Akane
Ishigaki, legal representative Aya
Ishigaki, legal representative Satomi
Andrus Sceales Starke & Sawall LLP
Catalysts & Chemicals Industries Co., Ltd
JGC Corporation
Nguyen Cam N.
Sud-Chemie Catalysts Japan, Inc.
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