Particulate filter and material for producing the same

Details Particulate filter and material for producing the same Particulate filter and material for producing the same

F - Mech Eng,Light,Heat,Weapons

01

N

183/110, 25/135

F01N 3/02 (2006.01)

Patent

CA 1224422

Abstract of the Disclosure Apparatus for filtering solid particulates from sus- pension in fluid streams (especially carbon particulates from exhaust gas of diesel engines) comprising a honeycomb filter with thin porous walls defining cells extending therethrough, with the transverse cross-sectional shapes of the cells forming a repeating pattern of geometric shapes without interior corner angles of less than 30° and with alternate cells forming an inlet group and an outlet group. The inlet group is open at the inlet face and closed adjacent the outlet face. The outlet group is closed adjacent the inlet face and open at the outlet face. Each cell of each group shares cell walls only with cells of the other group. The walls may have a volume of substantially uniform interconnected open porosity and a mean pore diameter of the pores forming the open porosity lying within the area defined by the boundary lines connecting points 1-2-3-4 in FIG. 8 of the drawings. Further described are impervious, unglazed, sintered ceramic products of primarily cordierite crystal phase, exhibiting low coefficients of thermal expansion and having analytical molar composition of about 1.7-2.4 R0 1.9-2.4 A1203 4.5-5.2 SiO2, as well as a foamable particulate cement capable of forming sintered cordierite foamed ceramic masses, consisting essentially, by weight, of 1-40% cordierite grog, 99-60% ceramic base material and foaming agent, such as SiC, useful as materials for the apparatus.

380875

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