US4305845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zeolitic catalyst
Assignee: Honeywell UOP LLC
•
Filing: 1980-10-10
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Granted: 1981-12-15
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Expires: 2000-10-10
Abstract
Abstract A low temperature method of calcining a zeolitic catalyst and the product of the method, the method comprising reducing the water content of the catalyst to less than 1.5 wt. % by contacting the catalyst with a water-miscible organic fluid and thereafter calcining the catalyst at a temperature of less than about 1200 DEG F.
Inventors
- 👤 Hosheng Tu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:57
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/08; B01J29/00; B01J29/04; B01J29/06; B01J29/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
56 words
A low temperature method of calcining a zeolitic catalyst having a water content greater than about 1.5 wt.%, which comprises reducing the water content of said catalyst to less than about 1.5 wt.% by contacting said catalyst with a water-miscible organic fluid, and thereafter calcining said catalyst at a temperature of less than about 1200° F.
Claim 2
Dependent Claim
56 words
A low temperature method of calcining a zeolitic catalyst having a water content greater than about 1.5 wt.%, which comprises reducing the water content of said catalyst to less than about 1.5 wt.% by contacting said catalyst with a water-miscible organic fluid, and thereafter calcining said catalyst at a temperature of less than about 1200° F.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein said organic fluid is an aromatic solvent having from six to about ten carbon atoms.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein said zeolitic catalyst has a zeolite content of at least about 10 wt.%.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein said zeolitic catalyst comprises a zeolitic crystalline aluminosilicate dispersed in a matrix comprising silica and alumina.
Claim 6
Dependent Claim
23 words
The method of claim 1 wherein said zeolitic catalyst comprises a zeolite selected from the group consisting of X-type zeolite and Y-type zeolite.
Claim 7
Dependent Claim
49 words
A zeolitic catalyst having a water content of less than about 1.5 wt.% prepared by contacting a zeolitic catalyst having a water content of greater than aboit 1.5 wt.% with a water-miscible organic fluid, and thereafter calcining said zeolitic catalyst at a temperature of less than about 1200° F.
Claim 8
Dependent Claim
49 words
A zeolitic catalyst having a water content of less than about 1.5 wt.% prepared by contacting a zeolitic catalyst having a water content of greater than aboit 1.5 wt.% with a water-miscible organic fluid, and thereafter calcining said zeolitic catalyst at a temperature of less than about 1200° F.
Claim 9
Dependent Claim
21 words
The catalyst of Claim 6 wherein said organic fluid is an aromatic solvent having from six to about ten carbon atoms.
Claim 10
Dependent Claim
19 words
The catalyst of claim 6 wherein said zeolitic catalyst has a zeolite content of at least about 10 wt.%.
Claim 11
Dependent Claim
22 words
The catalyst of claim 6 wherein said zeolitic catalyst comprises a zeolitic crystalline aluminosilicate dispersed in a matrix comprising silica and alumina.
Claim 12
Dependent Claim
23 words
The catalyst of claim 6 wherein said zeolitic catalyst comprises a zeolite selected from the group consisting of X-type zeolite and Y-type zeolite.
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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) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |