US4495166A
Expired / Lapsed
US
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Synthesis of ZSM-5 utilizing a mixture of quaternary ammonium ions and amines
Assignee: Mobil Oil AS
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Filing: 1982-07-19
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Granted: 1985-01-22
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Expires: 2002-07-19
Abstract
Abstract A novel process for the preparation of ZSM-5 and ZSM-11 utilizing a mixture of both quaternary ammonium ions and amines in the forming solution is disclosed in order to enhance the rate of crystallization.
Inventors
- 👤 Robert B. Calvert
- 👤 Louis D. Rollmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:36
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/36; C01B39/38; C01B39/40; C01B37/00; C01B37/02; C01B39/365; Y; Y10; Y10S; Y10S423/00; Y10S423/22; Y10S423/29
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
142 words
In a process of manufacturing zeolite ZSM-5 which process comprises crystallizing an aqueous forming solution comprising a source of silica and a nitrogenous template and recovering said zeolite ZSM-5, the improvement which comprises utilizing as said nitrogenous template both a tetrapropyl-ammonium salt and an amine having the formula R 1 R 2 R 3 N wherein R 1 and R 2 are selected from the group consisting of hydrogen and lower alkyl of from 2-8 carbon atoms and R 3 is a lower alkyl of from 2-8 carbon atoms wherein the molar ratio of tetrapropylammonium salt to silica ranges from about 0.001 to 0.04, wherein the molar ratio of said amine to silica ranges from about 0.02 to about 0.18 and wherein the molar ratio of both the tetrapropylammonium salt and the amine to silica ranges from about 0.02 to about 0.22.
Claim 2
Dependent Claim
142 words
In a process of manufacturing zeolite ZSM-5 which process comprises crystallizing an aqueous forming solution comprising a source of silica and a nitrogenous template and recovering said zeolite ZSM-5, the improvement which comprises utilizing as said nitrogenous template both a tetrapropyl-ammonium salt and an amine having the formula R 1 R 2 R 3 N wherein R 1 and R 2 are selected from the group consisting of hydrogen and lower alkyl of from 2-8 carbon atoms and R 3 is a lower alkyl of from 2-8 carbon atoms wherein the molar ratio of tetrapropylammonium salt to silica ranges from about 0.001 to 0.04, wherein the molar ratio of said amine to silica ranges from about 0.02 to about 0.18 and wherein the molar ratio of both the tetrapropylammonium salt and the amine to silica ranges from about 0.02 to about 0.22.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein the forming solution also contains a source of alumina.
Claim 4
Dependent Claim
28 words
The process of claim 1 where the amine is selected from the group consisting of n-butylamine, ethylamine, n-propylamine, i-propylamine, diethylamine, di-n-propylamine, di-i-propylamine, di-n-butylamine, , triethylamine, tripropylamine, and tributylamine.
Claim 5
Dependent Claim
10 words
The process of claim 3 where the amine is n-butylamine.
Claim 6
Dependent Claim
10 words
The process of claim 3 where the amine is i-propylamine.
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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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |