US4017590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of synthetic ferrierite
Assignee: Zeochem Corp
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Filing: 1976-04-15
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Granted: 1977-04-12
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Expires: 1996-04-15
Abstract
Abstract Synthetic Na,K-ferrierite, a molecular sieve zeolite capable of intracrystalline adsorption of molecules, is prepared by hydrothermal synthesis in the water, soda, potash, alumina, silica system. Crystallization is best achieved in the temperature range of 230°-310° C and autoclaving times of 2-96 hours with the use of co-precipitated silica-alumina gels and Na and K carbonates and bicarbonates.
Inventors
- 👤 William E. Cormier
- 👤 Leonard B. Sand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:23
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2869; Y; Y10; Y10S; Y10S423/00; Y10S423/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A method of synthesizing a zeolite having the structure of ferrierite, comprising the steps of: a. preparing a mixture including a source of silicon, a source of aluminum, a source of water, a source of sodium, and a source of potassium; and b. allowing the mixture to react in the presence of carbon dioxide in the pressure vessel, wherein the mixture contains a carbonate-bicarbonate buffer pair, wherein the composition of the mixture as expressed in mole oxide ratios is ##EQU1##wherein the mixture before reaction contained no ferrierite, and wherein the mixture is held at 230° C to 310° C for 3 to 1011/2 hours.
Claim 2
Independent Claim
104 words
A method of synthesizing a zeolite having the structure of ferrierite, comprising the steps of: a. preparing a mixture including a source of silicon, a source of aluminum, a source of water, a source of sodium, and a source of potassium; and b. allowing the mixture to react in the presence of carbon dioxide in the pressure vessel, wherein the mixture contains a carbonate-bicarbonate buffer pair, wherein the composition of the mixture as expressed in mole oxide ratios is ##EQU1##wherein the mixture before reaction contained no ferrierite, and wherein the mixture is held at 230° C to 310° C for 3 to 1011/2 hours.
References Cited (Backward Citations)
US3030181A
Cited
US3247195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |