US4427791A
Expired / Lapsed
US
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Activation of inorganic oxides
Assignee: Mobil Oil AS
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Filing: 1982-03-08
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Granted: 1984-01-24
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Expires: 2002-03-08
Abstract
Abstract A method for enhancing the activity of inorganic oxide materials is disclosed which involves treating same with a fluoride reagent of ammonium fluoride or boron fluoride, contacting the fluoride reagent contacted material with an ammonium exchange solution and then calcining the final product.
Inventors
- 👤 Joseph N. Miale
- 👤 Clarence D. Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:23
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J21/00; B01J21/02; B01J21/04; B01J23/00; B01J23/08; B01J37/00; B01J37/22; B01J37/26; B01J37/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A method for enhancing the activity of an inorganic oxide material, which comprises contacting said material with a fluoride reagent selected from the group consisting of ammonium fluoride and boron fluoride at a temperature of from about 0° C. to about 100° C., contacting said fluoride reagent contacted material with an aqueous ammonium exchange solution and thereafter calcining said material at a temperature of from about 200° C. to about 600° C. in order to obtain an inorganic oxide material having enhanced activity.
Claim 2
Independent Claim
83 words
A method for enhancing the activity of an inorganic oxide material, which comprises contacting said material with a fluoride reagent selected from the group consisting of ammonium fluoride and boron fluoride at a temperature of from about 0° C. to about 100° C., contacting said fluoride reagent contacted material with an aqueous ammonium exchange solution and thereafter calcining said material at a temperature of from about 200° C. to about 600° C. in order to obtain an inorganic oxide material having enhanced activity.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein said inorganic oxide material is alumina or gallia.
Claim 4
Dependent Claim
24 words
The method of claim 2 wherein said aqueous ammonium exchange solution is selected from the group consisting of ammonium hydroxide and an ammonium salt.
Claim 5
Dependent Claim
23 words
The method of claim 3 wherein said ammonium salt is selected from the group consisting of ammonium nitrate, ammonium sulfate and ammonium chloride.
Claim 6
Dependent Claim
31 words
The method of claim 1 wherein said inorganic oxide material is calcined prior to contact with the fluoride reagent at a temperature of from about 200° C. to about 600° C.
Claim 7
Dependent Claim
19 words
An inorganic oxide material having enhanced activity prepared by the method of claim 1, 2, 3, 4 or 5.
Claim 8
Dependent Claim
22 words
The method of claim 1 wherein said fluoride reagent contacting is at a temperature of from about ambient to about 50° C.
Claim 9
Dependent Claim
10 words
The method of claim 2 wherein said alumina is gamma-alumina.
Claim 10
Dependent Claim
16 words
The method of claim 1 wherein said inorganic oxide material is in the form of beads.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |