US5840271A
Expired / Lapsed
US
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Synthetic material with high void volume associated with mesoporous tortuous channels having a narrow size distribution
Assignee: Petróleos de Venezuela SA
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Filing: 1997-01-31
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Granted: 1998-11-24
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Expires: 2017-01-31
Abstract
Abstract A process for preparing an inorganic porous material, includes the steps of forming a solution of a hydrolyzable inorganic compound with a non-ionic surfactant having organic molecules; inducing growth and condensation of a solid composition comprising an inorganic composition in intimate contact with said organic molecules; and extracting said organic molecules from said inorganic composition so as to provide said inorganic porous material having wall portions defining mesopore-sized channels having a mean diameter of between about 15 ANGSTROM to about 100 ANGSTROM and a narrow diameter distribution of less than or equal to about 30 ANGSTROM , said material having a void volume from said mesopore-sized channels of at least about 0.1 cc/g.
Inventors
- 👤 Jose Carrazza
- 👤 Jose Rafael Cordova
- 👤 Juan Lujano
- 👤 Jose Manuel Cruz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:45
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/03; B01J29/0308; B01J20/00; B01J20/02; B01J20/04; B01J20/041; B01J20/06; B01J20/08; B01J20/10; B01J20/103; B01J20/12; B01J20/28; B01J20/28014; B01J20/28042; B01J20/28054; B01J20/28078; B01J20/28083; B01J20/28088; B01J20/2809; B01J35/00; B01J35/60; B01J35/64; B01J35/647; C; C01; C01B; C01B37/00; C01B37/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
73 words
A composition of matter, comprising an inorganic porous metal oxide material, said material being a non-crystalline material having a short range order structure and having wall portions defining mesopore-sized channels having a mean diameter of between about 15 Å to about 100 Å and a narrow diameter distribution of less than or equal to about 30 Å, said material having a void volume from said mesopore-sized channels of at least about 0.1 cc/g.
Claim 2
Dependent Claim
73 words
A composition of matter, comprising an inorganic porous metal oxide material, said material being a non-crystalline material having a short range order structure and having wall portions defining mesopore-sized channels having a mean diameter of between about 15 Å to about 100 Å and a narrow diameter distribution of less than or equal to about 30 Å, said material having a void volume from said mesopore-sized channels of at least about 0.1 cc/g.
Claim 3
Dependent Claim
23 words
A composition according to claim 1, wherein said material has a void volume from said mesopore-sized channels of at least about 0.2 cc/g.
Claim 4
Dependent Claim
26 words
A composition according to claim 1, wherein said composition exhibits an adsorption isotherm having inflection points between P/P 0 values of about 0.05 to about 0.8.
Claim 5
Dependent Claim
24 words
A composition according to claim 1, wherein said composition exhibits a substantially flat adsorption isotherm at P/P 0 values of greater than about 0.8.
Claim 6
Dependent Claim
11 words
A composition according to claim 1, wherein said channels are tortuous.
Claim 7
Dependent Claim
21 words
A composition according to claim 1, wherein said material exhibits a repeat value of less than or equal to about 5.
Claim 8
Dependent Claim
22 words
A composition according to claim 1, wherein said material exhibits only diffuse halos at d spacing values of larger than 20 Å.
Claim 9
Dependent Claim
142 words
A process for preparing an inorganic porous metal oxide material, comprising the steps of: forming a solution of a hydrolyzable inorganic compound with a non-ionic surfactant having organic molecules; inducing growth and condensation of a solid composition comprising an inorganic composition in intimate contact with said organic molecules by adjusting said solution to a pH equal to or within about ±2 pH numbers of an isoelectric point mean value of inorganic species of said inorganic compound; and extracting said organic molecules from said inorganic composition so as to provide said inorganic porous material having wall portions defining mesopore-sized channels having a mean diameter of between about 15 Å to about 100 Å and a narrow diameter distribution of less than or equal to about 30 Å, said material having a void volume from said mesopore-sized channels of at least about 0.1 cc/g.
Claim 10
Dependent Claim
142 words
A process for preparing an inorganic porous metal oxide material, comprising the steps of: forming a solution of a hydrolyzable inorganic compound with a non-ionic surfactant having organic molecules; inducing growth and condensation of a solid composition comprising an inorganic composition in intimate contact with said organic molecules by adjusting said solution to a pH equal to or within about ±2 pH numbers of an isoelectric point mean value of inorganic species of said inorganic compound; and extracting said organic molecules from said inorganic composition so as to provide said inorganic porous material having wall portions defining mesopore-sized channels having a mean diameter of between about 15 Å to about 100 Å and a narrow diameter distribution of less than or equal to about 30 Å, said material having a void volume from said mesopore-sized channels of at least about 0.1 cc/g.
Claim 11
Dependent Claim
26 words
A process according to claim 8, wherein said hydrolyzable inorganic compound is selected from the group consisting of chlorides, alkoxides, nitrates, hydroxides, sulphates and mixtures thereof.
Claim 12
Dependent Claim
23 words
A process according to claim 9, wherein said hydrolyzable inorganic compound is selected from the group consisting of nitrates, hydroxides and mixtures thereof.
Claim 13
Dependent Claim
21 words
A process according to claim 8, further comprising the step of adding an acid to said solution to adjust said pH.
Claim 14
Dependent Claim
11 words
A process according to claim 11, wherein said acid is HCl.
Claim 15
Dependent Claim
28 words
A process according to claim 8, wherein said non-ionic surfactant is selected from the group consisting of ethoxylated alcohols, ethoxylated alkylphenols, amine oxides, ethoxylated amines and mixtures thereof.
Claim 16
Dependent Claim
32 words
A process according to claim 13, wherein said non-ionic surfactant is present in a molar ratio of surfactant to inorganic species of said inorganic compound of between about 0.05 to about 20.
Claim 17
Dependent Claim
27 words
A process according to claim 8, wherein said extracting step comprises calcining said solid composition so as to extract said organic molecules and thereby form said channels.
Claim 18
Dependent Claim
34 words
A process according to claim 15, wherein said calcining step is carried out at a temperature of between about 400° C. to about 800° C., for a period of at least about 1 hour.
Claim 19
Dependent Claim
20 words
A process according to claim 8, further comprising the step of adding an organic water insoluble compound to said solution.
Claim 20
Dependent Claim
26 words
A process according to claim 17, wherein said organic water insoluble compound is selected from the group consisting of p-xylene, trimethylbenzene, triethylbenzene, dimethyladamantane and mixtures thereof.
Claim 21
Dependent Claim
43 words
A process according to claim 9, wherein said solution is prepared using a precursor of said hydrolyzable inorganic compound, wherein said precursor is selected from the group consisting of colloidal silica, alumina sols, suspensions of pseudo-bentonite, titania, zirconia, oxide hydrosols and mixtures 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) | 2001-11-23 | 2002-05-25 | 2002-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-23 | 2006-05-25 | 2006-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-23 | 2010-05-25 | 2010-11-24 | $7700.00 | Window Closed / Lapsed |