US4146504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous powders and a method for their preparation
Assignee: EMAG LLC
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Filing: 1974-09-26
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Granted: 1979-03-27
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Expires: 1994-09-26
Abstract
Abstract Novel materials formed from powders of high porosity, usually characterized by high surface area and always with a very low bulk density, are disclosed. Metal-bearing powders of this type are found to be particularly useful as catalysts and in magnetic applications. Some such powders find use in reinforcement of resins. Also disclosed are novel procedures suitable for making such powders and novel processes and novel compositions in which these powders can be advantageously utilized.
Inventors
- 👤 Robert J. Deffeyes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:40
CPC Classifications
B; B01; B01J; B01J35/00; B01J35/30; B01J35/33; B01J23/00; B01J23/70; B01J23/74; B01J35/60; B01J35/61; B01J35/613
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
98 words
A process for making ferromagnetic particles comprising the steps of (1) taking a powder characterized with a ratio of (1) the bulk density of the mass to (2) specific gravity of the material from which the powder is formed up to about 0.08; and wherein said particles are highly porous and characterized by a surface area in excess of 5 meters 2 per gram (2) comminuting it to a particle having a magnetic particle size of less than 500 angstroms, said comminuting step being sufficiently mild that the coercive force change is less than 10% during said step.
Claim 2
Dependent Claim
98 words
A process for making ferromagnetic particles comprising the steps of (1) taking a powder characterized with a ratio of (1) the bulk density of the mass to (2) specific gravity of the material from which the powder is formed up to about 0.08; and wherein said particles are highly porous and characterized by a surface area in excess of 5 meters 2 per gram (2) comminuting it to a particle having a magnetic particle size of less than 500 angstroms, said comminuting step being sufficiently mild that the coercive force change is less than 10% during said step.
Claim 3
Dependent Claim
67 words
A process of making metal-bearing catalysts comprising of the steps (1) taking an organometallic salt mass of a first metal adapted for decomposition to a metal oxide catalytic support and of a second metal adapted for decomposition to a catalytic metal (2) decomposing said organometallic salt to form a matrix of the oxide of said first metal on which is distributed minute masses of said second metal.
Claim 4
Dependent Claim
67 words
A process of making metal-bearing catalysts comprising of the steps (1) taking an organometallic salt mass of a first metal adapted for decomposition to a metal oxide catalytic support and of a second metal adapted for decomposition to a catalytic metal (2) decomposing said organometallic salt to form a matrix of the oxide of said first metal on which is distributed minute masses of said second metal.
Claim 5
Dependent Claim
34 words
A process as defined in claim 2 wherein said salt mass comprises a salt formed with both first and second metals minute masses of said second metal are below 150 angstroms in average size.
Claim 6
Dependent Claim
19 words
A process as defined in claim 2 wherein said minute masses of said second metal are substantially super paramagnetic.
Claim 7
Dependent Claim
33 words
A catalyst comprising a matrix of an oxide of a metal and, intimately dispersed and spaced throughout said matrix, in masses of less than about 150 angstroms, in average diameter, a catalytic metal.
Claim 8
Dependent Claim
33 words
A catalyst comprising a matrix of an oxide of a metal and, intimately dispersed and spaced throughout said matrix, in masses of less than about 150 angstroms, in average diameter, a catalytic metal.
Claim 9
Dependent Claim
14 words
A catalyst as defined in claim 5 wherein said catalyst is substantially super paramagnetic.
Claim 10
Dependent Claim
17 words
A catalyst as defined in claim 5 wherein said metal comprises at least 5% of cobalt metal.
Claim 11
Dependent Claim
28 words
A catalyst as defined in claim 5 comprising an effective pore size of above 25 angstroms and a bulk density of less than about 0.4 grams per cc.
Claim 12
Dependent Claim
28 words
A catalyst as defined in claim 6 comprising an effective pore size of above 25 angstroms and a bulk density of less than about 0.4 grams per cc.
Claim 13
Dependent Claim
28 words
A catalyst as defined in claim 7 comprising an effective pore size of above 25 angstroms and a bulk density of less than about 0.4 grams per cc.
Claim 14
Dependent Claim
12 words
A catalyst as defined in claim 6 wherein said oxide is alumina.
Claim 15
Dependent Claim
17 words
A catalyst formed of a metal as defined in claim 5, said metal comprising a cobalt-bearing alloy.
Claim 16
Dependent Claim
86 words
A process as defined in claim 2 wherein said matrix is an inorganic particulate product comprising a mass of porous powder particles, said product material characterized by a ratio of (1) the bulk density of the mass to (2) specific gravity of the material from which the powder is formed is up to about 0.08; and wherein said particles are highly porous and characterized by a surface area in excess of 5 meters 2 per gram, and an effective pore size of greater than 25 angstroms.
Claim 17
Dependent Claim
38 words
A process as defined in claim 13 wherein said matrix is characterized by an effective pore size of between 25 to 200 angstroms in diameter and comprises a surface area of at least 25 square meters per gram.
Claim 18
Dependent Claim
25 words
A process as defined in claim 2 wherein said metal comprises cobalt, and has a surface area of at least 5 square meters per gram.
Claim 19
Dependent Claim
18 words
A catalyst as defined in claim 5 wherein said metal comprises an alloy as a metal component thereof.
Claim 20
Dependent Claim
22 words
A catalyst as defined in claim 16 wherein said metal comprises a major quantity of nickel and a minor quantity of cobalt.
Claim 21
Dependent Claim
15 words
A catalyst as defined in claim 16 wherein said catalytic metal is a cobalt-bearing alloy.
Claim 22
Dependent Claim
13 words
A catalyst as defined in claim 16 wherein said catalytic metal comprises nickel.
Claim 23
Dependent Claim
15 words
A catalyst as defined in claim 18 wherein said catalytic metal comprises a cobalt-nickel-containing alloy.
Claim 24
Dependent Claim
38 words
A catalyst as defined in claim 19 wherein said oxide is a member selected from the group consisting of alumina, magnesia, cerium oxide, oxides of a rare earth, zinc oxide, calcium oxide, or a combination of said members.
Claim 25
Dependent Claim
39 words
A catalyst as defined in claim 5 wherein said material is constructed of particles having (1) a nuclei of a first metal oxide material and (2) a metal-bearing oxide material relatively rich in metal on the exterior surface thereof.
Claim 26
Dependent Claim
39 words
A catalyst as defined in claim 6 wherein said material is constructed of particles having (1) a nuclei of a first metal oxide material and (2) a metal-bearing oxide material relatively rich in metal on the exterior surface thereof.
Claim 27
Dependent Claim
40 words
A powder product as defined in claim 8 wherein said material is constructed of particles having (1) a nuclei of a first metal oxide material and (2) a metal-bearing oxide material relatively rich in metal on the exterior surface thereof.
Claim 28
Dependent Claim
40 words
A powder product as defined in claim 20 wherein said material is constructed of particles having (1) a nuclei of a first metal oxide material and (2) a metal-bearing oxide material relatively rich in metal on the exterior surface thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |