Ceramic honeycomb filter for purifying exhaust gases

B - Operations – Transporting – 01 – D

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B01D 46/00 (2006.01) B01D 53/94 (2006.01) B01J 35/04 (2006.01) F01N 3/02 (2006.01) F01N 3/022 (2006.01) F01N 3/035 (2006.01) F01N 3/28 (2006.01)

Patent

CA 1314496

62-16,124 CERAMIC HONEYCOMB FILTER FOR PURIFYING EXHAUST GASES Abstract of the Disclosure A ceramic honeycomb filter for purifying exhaust gases from combustion engines includes a ceramic honeycomb structure formed by extruding and having a number of through-passages alternately closed at their ends by ceramic closure members. The through-passages formed by partition walls for capturing fine particles in the exhaust gases accumulated on the partition walls. The ceramic honeycomb filter comprises porous ceramic layers provided on the partition walls over a distance of 1/10-8/10 of an effective length of the filter from outlet ends of said through-passages for the exhaust gases.

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