US5213895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particle-bearing composite and a method for producing the same
Assignee: Osaka Soda Co Ltd
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Filing: 1991-09-11
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Granted: 1993-05-25
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Expires: 2011-09-11
Abstract
Abstract Disclosed is a particle-bearing composite comprising a solid carrier and polymer-protected particles adsorbed thereon, wherein the polymer has a number average molecular weight of 3,000 to 300,000 and the particles are of a metal and/or a metal compound. The particle-bearing composite of the present invention is produced by a method in which a polymer-protected colloidal dispersion, which is comprised of a dispersion medium, colloidal metallic particles and/or metal compound particles dispersed in the dispersion medium and a protective polymer having a number average molecular weight of 3,000 to 300,000 and serving as a protective colloid for protecting the colloidal particles, is contacted with a solid carrier. The particle-bearing composite of the present invention can exhibit excellent catalytic performances with high reproducibility when used as an active component-bearing type catalyst, and can also be advantageously used in the fields of electric and magnetic materials because the metallic particles and/or metal compound particles uniformly borne by the solid carrier in the particle-bearing composite of the present invention can exert excellent electric and magnetic performances.
Inventors
- 👤 Hidefumi Hirai
- 👤 Hironobu Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:55
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/48; B01J23/50; B01J31/00; B01J31/02; B01J31/06; B01J33/00; B01J35/00; B01J35/30; B01J35/33; B01J35/391; B01J35/393; B01J35/40; B01J35/45; B01J37/00; B01J37/02; B01J37/0215; B01J37/0221; B01J2231/00; B01J2231/60; B01J2231/64; B01J2231/641; B01J2231/643; B01J2231/645; B01J2235/00; B01J2235/30; B01J35/20; B01J35/23; Y; Y10; Y10S; Y10S526/00; Y10S526/908; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
105 words
A particle-bearing composite comprising: a solid carrier, particles of at least one member selected from the group consisting of a metal and a metal compound, said particles being adsorbed on said carrier, and, an organic protective polymer having a number average molecular weight of from 3,000 to 300,000, said particles having said protective polymer adsorbed thereon and being substantially individually and separately protected by said protective polymer, and wherein at least one of said solid carrier and said protective polymer has no functional group capable of serving to form a covalent bond and perform a chemical binding between said solid carrier and said protective polymer.
Claim 2
Dependent Claim
105 words
A particle-bearing composite comprising: a solid carrier, particles of at least one member selected from the group consisting of a metal and a metal compound, said particles being adsorbed on said carrier, and, an organic protective polymer having a number average molecular weight of from 3,000 to 300,000, said particles having said protective polymer adsorbed thereon and being substantially individually and separately protected by said protective polymer, and wherein at least one of said solid carrier and said protective polymer has no functional group capable of serving to form a covalent bond and perform a chemical binding between said solid carrier and said protective polymer.
Claim 3
Dependent Claim
37 words
The composite according to claim 1, wherein said polymer is present in an amount of from 0.01 to 30 in terms of a molar ratio of monomer units constituting said polymer to metal atoms of said particles.
Claim 4
Dependent Claim
28 words
The composite according to claim 1, wherein said particles are adsorbed on said carrier in an amount of at least 1×10 -7 moles per gram of said carrier.
Claim 5
Independent Claim
175 words
A method for producing a particle-bearing composite, which comprises: (1) providing a polymer-protected colloidal dispersion comprising: (a) a dispersion medium, (b) colloidal particles of at least one member selected from the group consisting of a metal and a metal compound, said colloidal particles being dispersed in said dispersion medium, and (c) an organic protective polymer having a number average molecular weight of from 3,000 to 300,000. said collidal particles having said protective polymer adsorbed thereon and being individually and separately protected by said protective polymer serving as a protective colloid; (2) contacting said polymer-protected colloidal dispersion with a solid carrier at a temperature of from 0° to 100° C., wherein at least one of said solid carrier and said protective polymer has no functional group capable of serving to form a covalent bond and perform a chemical binding between said solid carrier and said protective polymer, to thereby form a particle-bearing composite comprising said solid carrier and, adsorbed thereon, said particles protected by said protective polymer; and (3) isolating said composite from said dispersion medium.
Claim 6
Independent Claim
175 words
A method for producing a particle-bearing composite, which comprises: (1) providing a polymer-protected colloidal dispersion comprising: (a) a dispersion medium, (b) colloidal particles of at least one member selected from the group consisting of a metal and a metal compound, said colloidal particles being dispersed in said dispersion medium, and (c) an organic protective polymer having a number average molecular weight of from 3,000 to 300,000. said collidal particles having said protective polymer adsorbed thereon and being individually and separately protected by said protective polymer serving as a protective colloid; (2) contacting said polymer-protected colloidal dispersion with a solid carrier at a temperature of from 0° to 100° C., wherein at least one of said solid carrier and said protective polymer has no functional group capable of serving to form a covalent bond and perform a chemical binding between said solid carrier and said protective polymer, to thereby form a particle-bearing composite comprising said solid carrier and, adsorbed thereon, said particles protected by said protective polymer; and (3) isolating said composite from said dispersion medium.
Claim 7
Dependent Claim
43 words
The method according to claim 4, wherein said protective polymer of said colloidal dispersion is present in an amount of from 0.01 to 30 in terms of a molar ratio of monomer units constituting said protective polymer to metal atoms of said particles.
Claim 8
Dependent Claim
30 words
The composite according to claim 1, wherein said metal is at least one member selected from the group consisting of palladium, rhodium, ruthenium, platinum, iridium, osmium, silver, gold and copper.
Claim 9
Dependent Claim
37 words
The composite according to claim 1, wherein said metal compound is at least one of borides, sulfides, hydroxides or oxides of a metal selected from the group consisting of iron, nickel, cobalt, cadmium, copper, barium and aluminum.
Claim 10
Dependent Claim
30 words
The method according to claim 4, wherein said metal is at least one member selected from the group consisting of palladium, rhodium, ruthenium, platinum, iridium, osmium, silver, gold and copper.
Claim 11
Dependent Claim
37 words
The method according to claim 4, wherein said metal compound is at least one of borides, sulfides, hydroxides or oxides of a metal selected from the group consisting of iron, nickel, cobalt, cadmium, copper, barium and aluminum.
Claim 12
Dependent Claim
38 words
The composite according to claim 1, wherein said organic protective polymer is selected from the group consisting of poly(N-vinyl-2-pyrrolidone), poly(vinyl alcohol), copolymer of N-vinyl-2-pyrrolidone with acrylamide or methyl acrylate, poly(methyl vinyl ether), gelatin, sodium casein and gum arabic.
Claim 13
Dependent Claim
38 words
The method according to claim 4, wherein said organic protective polymer is selected from the group consisting of poly(N-vinyl-2-pyrrolidone), poly(vinyl alcohol), copolymer of N-vinyl-2-pyrrolidone with acrylamide or methyl acrylate, poly(methyl vinyl ether), gelatin, sodium casein and gum arabic.
Claim 14
Dependent Claim
22 words
The composite according to claim 1, wherein said organic protective polymer has a number average molecular weight of from 10,000 to 160,000.
Claim 15
Dependent Claim
22 words
The method according to claim 4, wherein said organic protective polymer has a number average molecular weight of from 10,000 to 160,000.
Claim 16
Dependent Claim
35 words
The composite according to claim 1, wherein said solid carrier is selected from the group consisting of activated carbon, silica gel, alumina, silica-alumina, silicon carbide, zirconium silicate, polystyrene or derivaties thereof, diatomaceous earth and pumice.
Claim 17
Dependent Claim
35 words
The method according to claim 4, wherein said solid carrier is selected from the group consisting of activated carbon, silica gel, alumina, silica-alumina, silicon carbide, zirconium silicate, polystyrene or derivatives thereof, diatomaceous earth and pumice.
Claim 18
Dependent Claim
23 words
The composite according to claim 1, wherein the particle size of said metal and metal compound is from about 10Å to 0.3 μm.
Claim 19
Dependent Claim
23 words
The method according to claim 4, wherein the particle size of said metal and metal compound is from about 10Å to 0.3 μm.
Claim 20
Dependent Claim
19 words
The composite according to claim 1, wherein the average particle size is from about 40 Å to 2.0 μm.
Claim 21
Dependent Claim
18 words
The method according to claim 4, wherein the average particle size is from about 40Å to 2.0 μm.
Claim 22
Dependent Claim
39 words
The method according to claim 4, wherein said dispersion medium is selected from the group consisting of water, a straight chain or branched chain alcohol having 1 to 10 carbon atoms, a water miscible ether and a mixture 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) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |