Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1991-12-30
1993-04-20
Shine, W. J.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
502309, 502318, 502524, B01J 2104, B01J 2106, B01J 2326, B01J 2378
Patent
active
052043096
ABSTRACT:
A catalyst for neutralizing vapors and aerosols of organic compounds, carbon monoxide, and a variety of other oxidizable materials from an exhaust which contains oxygen. The catalyst has a carrier made either from titanium dioxide and aluminum oxide or from magnesium-aluminum spinel modified with titanium dioxide. The catalyst has a surface film of active components which include copper oxide and copper chromite (or their nickel or cobalt analog) chemically integrated into the carrier surface by Cu-o-Ti and Cr-O-Ti chains (or their nickel or cobalt analog). The catalyst should comprise from about 0.1% to about 15% by weight of copper oxide (CuO), chromium oxide (Cr.sub.2 O.sub.3), or mixtures of those compounds; from about 5% to about 25% by weight of copper chromite (CuCr.sub.2 O.sub.4); from about 3% to about 25% by weight titanium dioxide (TiO.sub.2); and from about 60% to about 90% by weight of aluminum oxide (Al.sub.2 O.sub.3), magnesium/aluminum spinel (MgAl.sub.2 O.sub.4), or mixtures of those compounds. Some or all of the copper ingredients can optionally be replaced with the corresponding nickel or cobalt compounds or mixtures thereof. A method of catalytically treating the impurities of exhausts with the present catalysts (particularly organic compounds), and thus converting them into carbon dioxide and water, is disclosed.
REFERENCES:
patent: 3870658 (1975-03-01), Farrauto et al.
patent: 4116884 (1978-09-01), Hayashi et al.
patent: 4367162 (1983-01-01), Fujitani et al.
patent: 4585625 (1986-04-01), Chadwick et al.
Molodogenjuk Tatjana B.
Vorob'iev Vladimir N.
Shine W. J.
TPCT Chemicals, Inc.
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