Honeycomb filter for clarifying exhaust gas and method for manufacture thereof
First Claim
1. A honeycomb filter for cleaning exhaust gas, which is a honeycomb filter for removing fine solid particles containing carbon as the main component in an exhaust gas, characterized in that the material for the honeycomb filter is an aluminum magnesium titanate sintered product obtained by firing at from 1000 to 1700°
- C. a mixture comprising a Mg-containing compound, an Al-containing compound and a Ti-containing compound in the same metal component ratio as the metal component ratio of Mg, Al and Ti in aluminum magnesium titanate represented by the empirical formula MgxAl2(1−
x)Ti(1+x)O5 (wherein 0<
x<
1).
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Accused Products
Abstract
To provide a honeycomb filter for cleaning exhaust gas, which is excellent in heat resistance and thermal shock resistance and has high thermal decomposition resistance and high mechanical strength and which is thus capable of being used with stability at high and fluctuating temperatures, and a process for its production.
A honeycomb filter for removing fine solid particles containing carbon as the main component in an exhaust gas, characterized in that the material for the honeycomb filter is an aluminum magnesium titanate sintered product obtained by firing at from 1000 to 1700° C. a formed product from a mixture comprising a Mg-containing compound, an Al-containing compound and a Ti-containing compound in the same metal component ratio as the metal component ratio of Mg, Al and Ti in aluminum magnesium titanate represented by the empirical formula MgxAl2(1−x)Ti(1+x)O5 (wherein 0<x<1), or a mixture comprising 100 parts by mass, as calculated as oxides, of the above-mentioned mixture and from 1 to 10 parts by mass of an alkali feldspar represented by the empirical formula (NayK1−y)AlSi3O8 (wherein 0≦y≦1).
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Citations
14 Claims
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1. A honeycomb filter for cleaning exhaust gas, which is a honeycomb filter for removing fine solid particles containing carbon as the main component in an exhaust gas, characterized in that the material for the honeycomb filter is an aluminum magnesium titanate sintered product obtained by firing at from 1000 to 1700°
- C. a mixture comprising a Mg-containing compound, an Al-containing compound and a Ti-containing compound in the same metal component ratio as the metal component ratio of Mg, Al and Ti in aluminum magnesium titanate represented by the empirical formula MgxAl2(1−
x)Ti(1+x)O5 (wherein 0<
x<
1). - View Dependent Claims (3, 11, 13)
- C. a mixture comprising a Mg-containing compound, an Al-containing compound and a Ti-containing compound in the same metal component ratio as the metal component ratio of Mg, Al and Ti in aluminum magnesium titanate represented by the empirical formula MgxAl2(1−
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2. A honeycomb filter for cleaning exhaust gas, characterized in that the material for the honeycomb filter is an aluminum magnesium titanate sintered product obtained by firing at from 1000 to 1700°
- C. a mixture comprising 100 parts by mass, as calculated as oxides, of a mixture comprising a Mg-containing compound, an Al-containing compound and a Ti-containing compound in the same metal component ratio as the metal component ratio of Mg, Al and Ti in aluminum magnesium titanate represented by the empirical formula MgxAl2(1−
)Ti(1+x)O5 (wherein 0<
x<
1), and from 1 to 10 parts by mass of an alkali feldspar represented by the empirical formula
(NayK1−
y)AlSi3O8 (wherein 0≦
y≦
1).- View Dependent Claims (8, 12, 14)
- C. a mixture comprising 100 parts by mass, as calculated as oxides, of a mixture comprising a Mg-containing compound, an Al-containing compound and a Ti-containing compound in the same metal component ratio as the metal component ratio of Mg, Al and Ti in aluminum magnesium titanate represented by the empirical formula MgxAl2(1−
-
4-7. -7. (canceled)
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9. A process for producing a honeycomb filter for cleaning exhaust gas, characterized by preparing a mixture comprising a Mg-containing compound, an Al-containing compound and a Ti-containing compound in the same metal component ratio as the metal component ratio of Mg, Al and Ti in aluminum magnesium titanate represented by the empirical formula MgxAl2(1−
- x)Ti(1+x)O5 (wherein 0<
x<
1), or a mixture comprising 100 parts by mass, as calculated as oxides, of such a mixture and from 1 to 10 parts by mass of an alkali feldspar represented by the empirical formula (NayK1−
y)AlSi3O (wherein 0≦
y≦
1), adding molding assistants to the mixture, followed by kneading to plasticize the mixture to make it extrusion-processable, and then extrusion processing it into a honeycomb structure, followed by firing at from 1000 to 1700°
C. - View Dependent Claims (10)
- x)Ti(1+x)O5 (wherein 0<
Specification