US4650655A
Expired / Lapsed
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Crystallization of ZSM-5 from reaction mixtures containing zeolite beta
Assignee: Mobil Oil AS
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Filing: 1984-07-26
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Granted: 1987-03-17
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Expires: 2004-07-26
Abstract
Abstract ZSM-11, ZSM-50 and zeolite beta are effective seeds for the crystallization of ZSM-5.
Inventors
- 👤 Pochen Chu
- 👤 Rene B. LaPierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:56
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/36; C01B39/38; C01B39/40; C01B37/00; C01B37/02; Y; Y10; Y10S; Y10S423/00; Y10S423/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
46 words
A process for making ZSM-5 comprising providing a reaction mixture from which ZSM-5 can crystallize, which reaction mixture is an alkaline mixture including a silica source with or without alumina; contacting said reaction mixture with a seed quantity of zeolite beta, and allowing ZSM-5 to crystallize.
Claim 2
Dependent Claim
46 words
A process for making ZSM-5 comprising providing a reaction mixture from which ZSM-5 can crystallize, which reaction mixture is an alkaline mixture including a silica source with or without alumina; contacting said reaction mixture with a seed quantity of zeolite beta, and allowing ZSM-5 to crystallize.
Claim 3
Dependent Claim
15 words
The process of claim 1, wherein said reaction mixture further includes a tetraalkyl ammonium compound.
Claim 4
Dependent Claim
15 words
The process of claim 1, wherein said reaction mixture further includes a tetrapropyl ammonium compound.
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) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |