US4240932A
Expired / Lapsed
US
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Exchanged mordenite catalysts and processes for producing the same
Assignee: HARSHAW/FILTROL PARTNERSHIP A PARTNERSHIP OF
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Filing: 1979-01-18
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Granted: 1980-12-23
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Expires: 1999-01-18
Abstract
Abstract This invention relates to exchanged mordenite and catalysts employing the same.
Inventors
- 👤 Hamid Alafandi
- 👤 Dennis Stamires
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:49
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
89 words
A process of exchanging sodium mordenite containing sodium, expressed as Na 2 O, of substantially greater than 2% of the mordenite on a volatile free basis, which comprises heating said mordenite in an acid solution or an acid solution containing NH 4 or polyvalent cations or mixtures of said cations at a temperature of about 250° F. to about 500° F. and removing mordenite from the solution, said mordenite containing sodium, expressed as Na 2 O of less than 2% of the exchanged mordenite on a volatile free basis.
Claim 2
Dependent Claim
89 words
A process of exchanging sodium mordenite containing sodium, expressed as Na 2 O, of substantially greater than 2% of the mordenite on a volatile free basis, which comprises heating said mordenite in an acid solution or an acid solution containing NH 4 or polyvalent cations or mixtures of said cations at a temperature of about 250° F. to about 500° F. and removing mordenite from the solution, said mordenite containing sodium, expressed as Na 2 O of less than 2% of the exchanged mordenite on a volatile free basis.
Claim 3
Dependent Claim
15 words
The process of claim 1 in which the polyvalent cation is a rare earth cation.
Claim 4
Dependent Claim
21 words
The process of claim 1 in which the sodium content of the mordenite which is exchanged is in excess of 6%.
Claim 5
Dependent Claim
21 words
The process of claim 2 in which the sodium content of the mordenite which is exchanges is in excess of 6%.
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) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |