Catalytic compositions and a deodorizing method using the same
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United States of America Patent
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Feb 16, 1999
Grant Date -
N/A
app pub date -
Dec 14, 1995
filing date -
Dec 26, 1994
priority date (Note) -
Expired
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Abstract
A malodorous component is eliminated using a catalytic composition comprising a phosphate of a tetravalent metal (titanium or other Group 4 elements of the Periodic Table of Elements), a hydroxide of a divalent metal (copper, zinc or other transition metal), and a photocatalyst. The photocatalyst includes sulfide-semiconductors, oxide-semiconductors and other photo-semiconductors, e.g. titanium oxide. The composition may further contain silicon dioxide and/or a silver component. The catalytic composition insures efficient elimination of not only acidic components and basic components but also neutral components over a long period, irrespective of with or without a light irradiation.
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