US4610700A
Expired / Lapsed
US
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Adsorbent composition useful in retarding corrosion in mufflers
Assignee: Katalistiks International Inc
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Filing: 1984-10-04
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Granted: 1986-09-09
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Expires: 2004-10-04
Abstract
Abstract The internal corrosion of metal mufflers used in conjunction with internal combustion engines is substantially retarded by maintaining in the external void space thereof an adsorbent mass of a combination of crystalline zeolites having the crystal structure of chabazite and the crystal structure of faujasite. These adsorbent compositions exhibit a synergistic effect on corrosion retardation. Novel muffler devices per se are also disclosed.
Inventors
- 👤 William C. Miller
- 👤 Stephen R. Dunne
- 👤 Joseph P. Ausikaitis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:13
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/16; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; F01N3/00; F01N3/005; F01N3/08; F01N3/0807; F01N2230/00; F01N2240/00; F01N2240/18; F01N2370/00; F01N2370/22; F01N2370/24; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/902
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
75 words
Method for inhibiting the corrosion of metal parts of a muffler used in conjunction with an internal combustion engine which comprises maintaining in the internal space of said muffler an adsorbent mass comprising a mixture of a crystalline zeolitic aluminosilicate having the chabazite crystal structure and a zeolitic aluminosilicate having the faujasite crystal structure, said adsorbent mass being in contact with any gases entering said muffler from the internal combustion engine and the ambient atmosphere.
Claim 2
Dependent Claim
75 words
Method for inhibiting the corrosion of metal parts of a muffler used in conjunction with an internal combustion engine which comprises maintaining in the internal space of said muffler an adsorbent mass comprising a mixture of a crystalline zeolitic aluminosilicate having the chabazite crystal structure and a zeolitic aluminosilicate having the faujasite crystal structure, said adsorbent mass being in contact with any gases entering said muffler from the internal combustion engine and the ambient atmosphere.
Claim 3
Dependent Claim
48 words
Method according to claim 1 wherein the zeolitic aluminosilicate having the chabazite crystal structure is a mineral chabazite and the zeolitic aluminosilicate having the faujasite crystal structure is a type-Y zeolite having a molar SiO 2 /Al 2 O 3 ratio of from about 4 to about 20.
Claim 4
Dependent Claim
31 words
Method according to claim 2 wherein the zeolitic adsorbent is employed in an amount of from about 2 to about 100 grams per 1,000 cubic inches of internal muffler void space.
Claim 5
Dependent Claim
40 words
Method according to claim 2 wherein the zeolitic aluminosilicate having the chabazite crystal structure is present in an amount of from 1/3 to 3 times, on an anhydrous weight basis, the amount of zeolitic aluminosilicate having the faujasite crystal structure.
Claim 6
Dependent Claim
54 words
Method according to claim 2 wherein at least about 50 percent of the AlO 4 framework tetrahedra of the type-Y zeolite are associated with sodium cations, and at least about 50 percent of the AlO 4 framework tetrahedra of the mineral chabazite are associated with sodium cations or calcium cations or a mixture thereof.
Claim 7
Dependent Claim
31 words
Method according to claim 4 wherein the zeolitic aluminosilicates comprise at least 70 percent, anhydrous weight basis, of the overall adsorbent mass, the residue consisting essentially of an inorganic binder material.
Claim 8
Dependent Claim
76 words
An exhaust muffler for an internal combustion engine comprising a metal casing through which exhaust gases are adapted to flow, said casing having an exhaust gas inlet and an outlet, and an adsorbent mass comprising a mixture of a crystalline aluminosilicate having the chabazite crystal structure and a zeolitic aluminosilicate having the faujasite crystal structure, said adsorbent mass being in contact with and gases entering said casing from the internal combustion engine and the ambient atmosphere.
Claim 9
Dependent Claim
76 words
An exhaust muffler for an internal combustion engine comprising a metal casing through which exhaust gases are adapted to flow, said casing having an exhaust gas inlet and an outlet, and an adsorbent mass comprising a mixture of a crystalline aluminosilicate having the chabazite crystal structure and a zeolitic aluminosilicate having the faujasite crystal structure, said adsorbent mass being in contact with and gases entering said casing from the internal combustion engine and the ambient atmosphere.
Claim 10
Dependent Claim
49 words
Muffler device according to claim 7 wherein the zeolitic aluminosilicate having the chabazite crystal structure is a mineral chabazite and the zeolitic aluminosilicate having the faujasite crystal structure is a type-Y zeolite having a molar SiO 2 /Al 2 O 3 ratio of from about 4 to about 20.
Claim 11
Dependent Claim
33 words
Muffler device according to claim 8 wherein the zeolitic adsorbent materials are present in an amount of from about 2 to about 50 grams per 1,000 cubic inches of internal muffler void space.
Claim 12
Dependent Claim
41 words
Muffler device according to claim 8 wherein the zeolitic aluminosilicate having the chabazite crystal structure is present in an amount of from 1/3 to 3 times, on an anhydrous weight basis, the amount of zeolitic aluminosilicate having the faujasite crystal structure.
Claim 13
Dependent Claim
55 words
Muffler device according to claim 8 wherein at least about 50 percent of the AlO 4 framework tetrahedra of the type-Y zeolite are associated with sodium cations, and at least about 50 percent of the AlO 4 framework tetrahedra of the mineral chabazite are associated with sodium cations or calcium cations or a mixture thereof.
Claim 14
Dependent Claim
32 words
Muffler device according to claim 10 wherein the zeolitic aluminosilicates comprise at least 70 percent, anhydrous weight basis, of the overall adsorbent mass, the residue consisting essentially of an inorganic binder material.
References Cited (Backward Citations)
US3067002A
Cited
US3618314A
Cited
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