US4427786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activation of high silica zeolites
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 high silica zeolite, i.e. a zeolite having a silica-to-alumina ratio greater than 100, which has been synthesized from a reaction mixture containing bulky ions is disclosed which involves compositing the zeolite with a support matrix, calcining the supported zeolite, treating same with boron fluoride, hydrolyzing the boron fluoride treated supported zeolite, contacting the hydrolyzed supported zeolite with a solution of an ammonium salt and then calcining the final product in order to obtain a supported zeolite having enhanced activity.
Inventors
- 👤 Joseph N. Miale
- 👤 Clarence D. Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:33
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/36; B01J2229/42
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
162 words
A method for enhancing the activity of a crystalline zeolite having a silica-to-alumina mole ratio greater than about 100, wherein said zeolite has been synthesized from a reaction mixture containing bulky ions, which comprises compositing said crystalline zeolite with a support matrix material of alumina, gallia or a combination thereof, calcining the resulting supported zeolite at a temperature of from about 200° C. to about 600° C. for a period of time ranging from about 1 minute to about 48 hours, contacting said calcined supported zeolite with volatile boron fluoride in a dry environment at a temperature of from about 0° C. to about 100° C. until said supported zeolite is saturated with said boron fluoride, purging unreacted boron fluoride from said boron fluoride contacted supported zeolite, hydrolyzing said boron fluoride contacted supported zeolite, contacting said hyrolyzed supported zeolite with an ammonium salt solution and thereafter calcining said supported zeolite at a temperature of from about 200° C. to about 600° C.
Claim 2
Independent Claim
162 words
A method for enhancing the activity of a crystalline zeolite having a silica-to-alumina mole ratio greater than about 100, wherein said zeolite has been synthesized from a reaction mixture containing bulky ions, which comprises compositing said crystalline zeolite with a support matrix material of alumina, gallia or a combination thereof, calcining the resulting supported zeolite at a temperature of from about 200° C. to about 600° C. for a period of time ranging from about 1 minute to about 48 hours, contacting said calcined supported zeolite with volatile boron fluoride in a dry environment at a temperature of from about 0° C. to about 100° C. until said supported zeolite is saturated with said boron fluoride, purging unreacted boron fluoride from said boron fluoride contacted supported zeolite, hydrolyzing said boron fluoride contacted supported zeolite, contacting said hyrolyzed supported zeolite with an ammonium salt solution and thereafter calcining said supported zeolite at a temperature of from about 200° C. to about 600° C.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein said crystalline zeolite has a silica-to-alumina mole ratio greater than about 500.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein said ammonium salt solution is ammonium nitrate.
Claim 5
Dependent Claim
11 words
The method of claim 2 wherein said crystalline zeolite is ZSM-5.
Claim 6
Dependent Claim
11 words
The method of claim 2 wherein said crystalline zeolite is ZSM-11.
Claim 7
Dependent Claim
27 words
The method of claim 1 wherein said bulky ions are provided by sources selected from the group consisting of onium compounds and compounds containing multiple cationic centers.
Claim 8
Dependent Claim
18 words
The method of claim 6 wherein said crystalline zeolite has a silica-to-alumina mole ratio greater than about 500.
Claim 9
Dependent Claim
13 words
The method of claim 6 wherein said ammonium salt solution is ammonium nitrate.
Claim 10
Dependent Claim
11 words
The method of claim 6 wherein said crystalline zeolite is ZSM-5.
Claim 11
Dependent Claim
11 words
The method of claim 6 wherein said crystalline zeolite is ZSM-11.
Claim 12
Dependent Claim
24 words
A supported zeolite composition having enhanced activity prepared by the method of claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.
Claim 13
Dependent Claim
24 words
The method of claim 1 wherein said volatile boron fluoride contacting is conducted at a temperature of from about ambient to about 50° C.
Claim 14
Dependent Claim
24 words
The method of claim 6 wherein said volatile boron fluoride contacting is conducted at a temperature of from about ambient to about 50° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 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 |