US4200552A
Expired / Lapsed
US
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Catalyst carrier, catalyst and their manufacturing process
Assignee: NGK Insulators Ltd
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Filing: 1979-01-11
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Granted: 1980-04-29
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Expires: 1999-01-11
Abstract
Abstract A porous catalyst carrier refractory material with its pores containing internally deposited active alumina, its total pore volume being 0.05-0.50 cc/g, its average pore diameter 0.05-5.0 mu and its specific surface area 3-60 m2/g and a method of making it.
Inventors
- 👤 Masaaki Noguchi
- 👤 Tsuchio Bunda
- 👤 Noboru Yamamoto
- 👤 Shigeo Soejima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:22
CPC Classifications
B; B01; B01J; B01J35/00; B01J35/60; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01J21/00; B01J21/02; B01J21/04; B01J23/00; B01J23/38; B01J23/40; B01J35/61; B01J35/612; B01J35/613; B01J35/63; B01J35/633; B01J35/64; B01J35/653
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
50 words
Catalyst carrier comprising a porous refractory material having the internal surface of its pores deposited with an active alumina, in which said deposited carrier has a total pore volume of 0.05 -0.50 cc/g, an average pore diameter of 0.05 -5.0μ and a specific surface area of 3-60 m 2 /g.
Claim 2
Dependent Claim
50 words
Catalyst carrier comprising a porous refractory material having the internal surface of its pores deposited with an active alumina, in which said deposited carrier has a total pore volume of 0.05 -0.50 cc/g, an average pore diameter of 0.05 -5.0μ and a specific surface area of 3-60 m 2 /g.
Claim 3
Dependent Claim
14 words
The catalyst carrier of claim 1, wherein its total pore volume is 0.10-0.35 cc/g.
Claim 4
Dependent Claim
13 words
The catalyst carrier of claim 1, wherein its average pore diameter is 0.1-2.0μ.
Claim 5
Dependent Claim
16 words
The catalyst carrier of claim 1, wherein its specific surface area is 10-30 m 2 /g.
Claim 6
Dependent Claim
31 words
The catalyst carrier of claim 1, wherein said refractory material is selected from the group consisting of α-alumina, zircon, mullite, cordierite, or a compound which yields such a substance when fired.
Claim 7
Dependent Claim
15 words
The catalyst constituted by making the catalyst carrier of claim 1, carry a catalytic element.
Claim 8
Dependent Claim
14 words
The catalyst of claim 6, wherein said catalytic element is a platinum family metal.
Claim 9
Dependent Claim
11 words
The catalyst of claim 6 used for auto exhaust gas purification.
Claim 10
Dependent Claim
89 words
Manufacturing process of the catalyst carrier of claim 1, comprising: a step of preparing a porous carrier material; a step of immersing said material in aqueous solution of aluminum salt; and a step of drying it and heat-treating it, whereby the internal surface of the pores in said material is deposited with an active alumina and the step of immersing the carrier material in aqueous solution of aluminum salt and drying it is repeated until the desired total pore volume, average pore diameter and specific surface area is attained.
Claim 11
Dependent Claim
31 words
The manufacturing process of claim 9, wherein said refractory material is selected from the group consisting of α-alumina, zircon, mullite, cordierite or a compound which yields such a substance when fired.
Claim 12
Dependent Claim
28 words
The manufacturing process of claim 9, wherein more than 80% of said carrier material is a refractory material and less than 20% of it is a sintering agent.
Claim 13
Dependent Claim
13 words
The manufacturing process of claim 9, wherein the aluminum salt is aluminum nitrate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |