EP0640382A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Exhaust purifying filter material and method for manufacturing the same
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1994-08-17
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Granted: —
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Expires: 2014-08-17
Abstract
Abstract Exhaust purifying filter material which can carry a larger amount of catalyst and from which the catalyst will not easily drop off even if subjected to vibrations or temperature changes due to repeated heating and cooling at high temperatures. Catalyst is carried on alumina whiskers formed on metal fiber having a composition of Fe-Ni-Cr-Al, Fe-Cr-Al or Ni-Cr-Al or woven or unwoven fabric formed of the metal fiber. The catalyst is firmly carried by the alumina whiskers. The amount of catalyst carried is increased with the increase in surface area.
Inventors
- 👤 Tomohiko Itami Works Of Sumitomo Elec.Ltd. Ihara
- 👤 Ishii Itami Works Of Sumitomo Elec.Ltd. Masayuki
- 👤 Yoshino Itami Works Of Sumitomo Elec.Ltd. Hiroshi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 06:45
CPC Classifications
B; B01; B01J; B01J35/00; B01J35/50; B01J35/58; F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2835; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2027; B01D39/2041; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01D2239/00; B01D2239/04; B01D2239/0471; B01D2239/0492; F01N2330/00; F01N2330/10; F01N2330/101; F01N2330/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
41 words
A filter material for purifying an exhaust gas comprising a substrate formed of metal fiber or unwoven or woven fabric of said metal fiber, alumina whiskers grown on the surface of said substrate, and a catalyst carried on said alumina whiskers.
Claim 2
Dependent Claim
41 words
A filter material for purifying an exhaust gas as claimed in claim 1 wherein said metal fiber comprises 5-20% by weight of Ni, 10-40% by weight of Cr, and 0.5-15% by weight of Al, the remainder being Fe and inevitable components.
Claim 3
Dependent Claim
36 words
A filter material for purifying an exhaust gas as claimed in claim 1 wherein said metal fiber comprises 10-40% by weight of Cr, and 0.5-15% by weight of Al, the remainder being Ni and inevitable components.
Claim 4
Dependent Claim
36 words
A filter material for purifying an exhaust gas as claimed in claim 1 wherein said metal fiber comprises 10-40% by weight of Cr, and 0.5-15% by weight of Al, the remainder being Fe and inevitable components.
Claim 5
Dependent Claim
38 words
A filter gas for purifying an exhaust gas as claimed in any of claims 2-4 wherein said metal fiber further contains at least one rare earth element including Y and Nd in the amount of 0.05-0.5% by weight.
Claim 6
Independent Claim
40 words
A method of manufacturing said filter material as claimed in any of claims 1-5 wherein said alumina whiskers are grown on said substrate by heating said substrate to a temperature of 800-1000°C in the atmosphere or in an oxidizing atmosphere.
References Cited (Backward Citations)
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