Filter medium for treating an exhaust gas

Details Filter medium for treating an exhaust gas Filter medium for treating an exhaust gas

1986-04-23

1988-03-01

Lacey, David L.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422176, 422177, 55316, 55380, 55382, 55486, 55524, 55DIG30, B01D 5000

Patent

active

047285036

ABSTRACT:
A filter medium for treating exhaust gases is described. The filter medium comprises a porous ceramic substrate, a pre-coat layer of a reaction aid and a layer of a solid material formed on one side of the substrate from which the exhaust gas is charged through the substrate, and a catalyst layer for eliminating nitrogen oxides formed on the other side of the substrate from which the exhaust gas is discharged. The filter medium may have a double-cylinder construction, in which the catalyst layer is formed on at least one side of a inner cylinder and the pre-coat layer and the solid material layer are formed on an outer side of an outer cylinder.

REFERENCES:
patent: 3227659 (1966-01-01), Bradenburg et al.
patent: 3526322 (1970-09-01), Burroughs et al.
patent: 3596441 (1971-08-01), Lundahl
patent: 3627497 (1971-12-01), Klein et al.
patent: 3826066 (1974-07-01), Higgins
patent: 3853510 (1974-12-01), Meyer et al.
patent: 4259096 (1981-03-01), Nakamura et al.
patent: 4426320 (1984-01-01), Ernest et al.
patent: 4472587 (1984-09-01), Benedetti et al.

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