US3966883A
Expired / Lapsed
US
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Synthetic ferrierite synthesis
Assignee: WR Grace and Co
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Filing: 1974-10-16
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Granted: 1976-06-29
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Expires: 1994-10-16
Abstract
Abstract A process for preparing a synthetic ferrierite having the absorption and catalytic properties characteristic of 5 to 8 angstrom zeolites which comprises treating a reaction mixture consisting of strontium, calcium and/or sodium, lithium or magnesium salts, a source of silica and a source of alumina and water with natural or synthetic ferrierite seeds and heating to convert the mass to the synthetic ferrierite.
Inventors
- 👤 David Evan William Vaughan
- 👤 Grant Campbell Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:19
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/44; Y; Y10; Y10S; Y10S423/00; Y10S423/23
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
A process for preparing synthetic ferrierite which comprises the steps of a. preparing a reactant mixture having the following oxide molar ratios of reactants 0.75 to 1.5 Li 2 O:0.9 to 1.2 Al 2 O 3 :7 to 20 SiO 2 :50 to 600 H 2 O, b. adding powdered natural or synthetic ferrierite in a concentration of about 0.1 to 10% to the reaction miture, c. heating the reactant mixture to about 180° to 325°C. in a closed reaction vessel at a pressure of 1 to 119 atmospheres, d. washing, drying and recovering a ferrierite product having the X-ray diffraction pattern essentially as shown in Table C.
Claim 2
Dependent Claim
108 words
A process for preparing synthetic ferrierite which comprises the steps of a. preparing a reactant mixture having the following oxide molar ratios of reactants 0.75 to 1.5 Li 2 O:0.9 to 1.2 Al 2 O 3 :7 to 20 SiO 2 :50 to 600 H 2 O, b. adding powdered natural or synthetic ferrierite in a concentration of about 0.1 to 10% to the reaction miture, c. heating the reactant mixture to about 180° to 325°C. in a closed reaction vessel at a pressure of 1 to 119 atmospheres, d. washing, drying and recovering a ferrierite product having the X-ray diffraction pattern essentially as shown in Table C.
Claim 3
Dependent Claim
15 words
The process according to claim 1, in which alumina hydrate is the source of alumina.
Claim 4
Dependent Claim
16 words
The process according to claim 1, in which silica gel powder is the source of silica.
Claim 5
Dependent Claim
16 words
The process according to claim 1, in which natural amorphous aluminosilicates, supply both silica and alumina.
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) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |