US4598056A
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Material containing microaggregates of metals, inorganic compounds or organometallic compounds, more particularly usable in heterogeneous catalysis and its production process
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1984-12-11
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Granted: 1986-07-01
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Expires: 2004-12-11
Abstract
Abstract The material comprises a membrane constituted either by at least one monomolecular layer of amphiphilic molecules, or by amphiphilic molecules adsorbed on a substrate, and microaggregates of the metal, inorganic compound or organometallic compound retained on or in the membrane. It is prepared from a membrane containing a metal ion or a precursor compound of said metal, inorganic compound or organometallic compound, by reacting the ion or precursor compound fixed in the membrane with at least one reagent for forming the metal, inorganic compound or organometallic compound in situ in the membrane. For example, the membrane can be constituted by monomolecular layers of behenic acid, which is then converted into silver behenate by contacting with a silver nitrate solution. Silver microaggregates are then formed in the membrane by reducing the silver behenate by means of hydrazine.
Inventors
- 👤 Andre Barraud
- 👤 Jean Leloup
- 👤 Annie Ruaudel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:46
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/024; B01J35/00; B01J35/50; B01J35/58; B01J35/59
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
63 words
A material incorporating microaggregates of a metal, an inorganic or organometallic compound, wherein it comprises a membrane constituted by either at least one monomolecular layer of organic amphiphilic molecules having both hydrophilic and hydrophobic groups, or by said organic amphiphilic molecules adsorbed on a substrate; and microaggregates of a metal, an inorganic compound or an organometallic compound retained on or in said membrane.
Claim 2
Dependent Claim
63 words
A material incorporating microaggregates of a metal, an inorganic or organometallic compound, wherein it comprises a membrane constituted by either at least one monomolecular layer of organic amphiphilic molecules having both hydrophilic and hydrophobic groups, or by said organic amphiphilic molecules adsorbed on a substrate; and microaggregates of a metal, an inorganic compound or an organometallic compound retained on or in said membrane.
Claim 3
Dependent Claim
20 words
A material according to claim 1, wherein the membrane is constituted by a stack of monomolecular layers of amphiphilic molecules.
Claim 4
Dependent Claim
20 words
A material according to claim 1; wherein the amphiphilic molecules are amphiphilic complexing agents for metals, metal complexes or acids.
Claim 5
Dependent Claim
12 words
A material according to claim 3, wherein the acids are fatty acids.
Claim 6
Dependent Claim
14 words
A material according to claim 1, wherein the microaggregates are microaggregates of a metal.
Claim 7
Dependent Claim
17 words
A material according to claim 5, wherein the metal is chosen from the group of noble metals.
Claim 8
Dependent Claim
15 words
A material according to claim 1, wherein the microaggregates are microaggregates of a metallic compound.
Claim 9
Dependent Claim
21 words
A material according to claim 7, wherein the metallic compound is selected from the group consisting of halides, chalcogenides and oxides.
Claim 10
Dependent Claim
103 words
A process for producing a membrane containing microaggregates of a metal, an inorganic compound or an organometallic compound and which comprises the following stages: (1) preparing a membrane constituted either by at least one monomolecular layer of organic amphiphilic molecules having both hydrophilic and hydrophobic groups, or by said organic amphiphilic molecules adsorbed on a substrate containing a metal ion or a precursor compound of said metal, inorganic compound or organometallic compound; and (2) reacting the ion or precursor compound fixed to the membrane with at least one reagent to form in situ in the membrane the metal, inorganic compound or organometallic compound.
Claim 11
Dependent Claim
103 words
A process for producing a membrane containing microaggregates of a metal, an inorganic compound or an organometallic compound and which comprises the following stages: (1) preparing a membrane constituted either by at least one monomolecular layer of organic amphiphilic molecules having both hydrophilic and hydrophobic groups, or by said organic amphiphilic molecules adsorbed on a substrate containing a metal ion or a precursor compound of said metal, inorganic compound or organometallic compound; and (2) reacting the ion or precursor compound fixed to the membrane with at least one reagent to form in situ in the membrane the metal, inorganic compound or organometallic compound.
Claim 12
Dependent Claim
79 words
A process according to claim 9, wherein the first stage is performed by firstly preparing a membrane from amphiphilic molecules in incorporating groups having a chemical or physical affinity for the ion or precursor compound of said metal, inorganic compound or organometallic compound and then by contacting the thus obtained membrane with a solution of the ion or precursor compound, so as to fix the ion or precursor compound to the sites of the membrane corresponding to said groups.
Claim 13
Dependent Claim
25 words
A process according to claim 9, wherein the first stage is performed by preparing the membrane from amphiphilic molecules containing said ion or precursor compound.
Claim 14
Dependent Claim
17 words
A process according to claim 9, wherein the membrane is constituted by monomolecular layers of amphiphilic molecules.
Claim 15
Dependent Claim
18 words
A process according to claim 9, wherein the membrane is constituted by amphiphilic molecules adsorbed on a substrate.
Claim 16
Dependent Claim
15 words
A process according to claim 9, wherein the molecules constituting the membrane are biological molecules.
Claim 17
Dependent Claim
16 words
A process according to claim 12, wherein the amphiphilic molecules are molecules of a fatty acid,
Claim 18
Dependent Claim
13 words
A process according to claim 9, wherein the reagent is a reducing agent.
Claim 19
Dependent Claim
13 words
A process according to claim 9, wherein the reagent is H 2 S.
Claim 20
Dependent Claim
63 words
A process for the preparation of microaggregates of a metal, an inorganic compound or organometallic compound, wherein it consists of preparing a membrane having microaggregates of the metal, inorganic compound or organometallic compound by performing the process according to claim 9, then selectively dissolving the membrane so as to release the microaggregates of metal, inorganic compound or organometallic compound formed in the membrane.
Claim 21
Dependent Claim
21 words
The material according to claim 1, wherein the metal is selected from the group consisting of silver, copper, palladium and platinum.
Claim 22
Dependent Claim
24 words
The material according to claim 1, wherein the inorganic compound is selected from the group consisting of metal halides, oxides, sulphides, selenides and tellurides.
Claim 23
Dependent Claim
31 words
The material according to claim 20, wherein the inorganic compounds are selected from the group consisting of silver chloride, silver bromide, copper oxide and the sulphides of cadmium, zinc and nickel.
Claim 24
Dependent Claim
24 words
The material according to claim 1, wherein the substrate is selected from the group consisting of calcium fluoride, collodion, quartz, glass, polylysine and alumina.
Claim 25
Dependent Claim
20 words
The material according to claim 3, wherein the complexing agents for metals are organic molecules containing nitrile or amine groups.
Claim 26
Dependent Claim
24 words
The material according to claim 4, wherein the fatty acids are selected from the group consisting of behenic, stearic, ω-tricosenoic, arachic, and 2,4-diylidyne-pentacosanoic acids.
Claim 27
Dependent Claim
12 words
The material according to claim 14, wherein the biological molecules are phospholipids.
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Cited
GB1200595A
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DE1800380A1
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FR1595890A
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FR2130465A1
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US4132668A
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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) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |