US5162283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly porous amorphous titania and titania/silica phases
Assignee: Mobil Oil AS
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Filing: 1991-01-22
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Granted: 1992-11-10
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Expires: 2011-01-22
Abstract
Abstract There is provided a highly porous amorphous titania or titania/silica material. The material may be prepared by gelling a reaction mixture comprising hydrolyzable titanium and optionally, hydrolyzable silicon compounds, such as titanium diisopropoxide (2,4-pentanedionate) and tetraethylorthosilicate, a nonaqueous solvent, such as ethanol, and water, followed by drying the gel. The titania or titania/silica material may be used as a catalyst, a catalyst support or a sorbent.
Inventors
- 👤 Ahmad Moini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:20
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/06; B01J21/063; B01J21/08; B01J37/00; B01J37/02; B01J37/03; B01J37/031; B01J37/033
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
A method for preparing an amorphous titania/silica material, said method comprising the steps of: (i) preparing a reaction mixture comprising (a) titanium diisopropoxide (2,4-pentanedionate) (b) a hydrolyzable silicon compound (c) a nonaqueous solvent for said titanium diisopropoxide (2,4-pentanedionate) and said hydrolyzable silicon compound and (d) water; (ii) subjecting said reaction mixture to sufficient hydrothermal hydrolyzing conditions to promote gelation of said reaction mixture; (iii) drying the gel of step (ii); and (iv) recovering an amorphous titania/silica material having a BET surface area of at least 120 m 2 /g.
Claim 2
Independent Claim
89 words
A method for preparing an amorphous titania/silica material, said method comprising the steps of: (i) preparing a reaction mixture comprising (a) titanium diisopropoxide (2,4-pentanedionate) (b) a hydrolyzable silicon compound (c) a nonaqueous solvent for said titanium diisopropoxide (2,4-pentanedionate) and said hydrolyzable silicon compound and (d) water; (ii) subjecting said reaction mixture to sufficient hydrothermal hydrolyzing conditions to promote gelation of said reaction mixture; (iii) drying the gel of step (ii); and (iv) recovering an amorphous titania/silica material having a BET surface area of at least 120 m 2 /g.
Claim 3
Dependent Claim
29 words
A method according to claim 1, wherein said titanium diisopropoxide (2,4-pentanedionate) and said hydrolyzable silicon compound are slowly and continuously hydrolyzed over a period of at least 12 hours.
Claim 4
Dependent Claim
26 words
A method according to claim 1, wherein said hydrolyzing conditions of step (ii) include maintaining said reaction mixture at a temperature of at least 80° C.
Claim 5
Dependent Claim
21 words
A method according to claim 1, wherein said hydrolyzing conditions of step (ii) include maintaining said reaction mixture under refluxing conditions.
Claim 6
Dependent Claim
18 words
A method according to claim 1, wherein nonaqueous solvent is evaporated from the reaction mixture during step (ii).
Claim 7
Dependent Claim
19 words
A method according to claim 1, wherein said hydrolyzable silicon compound is tetraethylorthosilicate, and said nonaqueous solvent is ethanol.
Claim 8
Independent Claim
79 words
A method for preparing an amorphous titania material, said method comprising the steps of: (i) preparing a reaction mixture comprising (a) titanium diisopropoxide (2,4-pentanedionate), (b) a nonaqueous solvent for said titanium diisopropoxide (2,4-pentanedionate) and (c) water; (ii) subjecting said reaction mixture to sufficient hydrothermal hydrolyzing conditions to promote gelation of said reaction mixture; (iii) drying the gel of step (ii); and (iv) recovering an amorphous titania material having a BET surface area of at least 120 m 2 /g.
Claim 9
Independent Claim
79 words
A method for preparing an amorphous titania material, said method comprising the steps of: (i) preparing a reaction mixture comprising (a) titanium diisopropoxide (2,4-pentanedionate), (b) a nonaqueous solvent for said titanium diisopropoxide (2,4-pentanedionate) and (c) water; (ii) subjecting said reaction mixture to sufficient hydrothermal hydrolyzing conditions to promote gelation of said reaction mixture; (iii) drying the gel of step (ii); and (iv) recovering an amorphous titania material having a BET surface area of at least 120 m 2 /g.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-11-10 | 1996-05-11 | 1996-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-10 | 2000-05-11 | 2000-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-10 | 2004-05-11 | 2004-11-10 | $7700.00 | Window Closed / Lapsed |