US4088739A
Expired / Lapsed
US
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Process for preparing synthetic ferrierite
Assignee: WR Grace and Co
•
Filing: 1976-06-25
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Granted: 1978-05-09
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Expires: 1996-06-25
Abstract
Abstract An improved process for preparing synthetic ferrierites having the absorption and catalytic properties characteristic of 5 to 8 angstrom zeolites which comprises promoting an alkaline reaction mixture comprising Group I and/or Group II cations, a source of silica, a source of alumina with lithium cations. The promoted reaction mixture is seeded with natural or synthetic ferrierite seeds, and heated to convert the mass to the synthetic ferrierite.
Inventors
- 👤 David E. W. Vaughan
- 👤 Grant C. Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:03
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/44; Y; Y10; Y10S; Y10S423/00; Y10S423/23
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
58 words
A process for preparing synthetic ferrierite which comprises: (a) preparing an alkaline reaction mixture which contains Group I and/or Group II cations, a source of alumina, a source of silica, water, powdered ferrierite seeds and promotional amounts of lithium cations; and (b) heating the reaction mixture at a temperature of about 180° to 325° C to form ferrierite.
Claim 2
Dependent Claim
58 words
A process for preparing synthetic ferrierite which comprises: (a) preparing an alkaline reaction mixture which contains Group I and/or Group II cations, a source of alumina, a source of silica, water, powdered ferrierite seeds and promotional amounts of lithium cations; and (b) heating the reaction mixture at a temperature of about 180° to 325° C to form ferrierite.
Claim 3
Dependent Claim
25 words
The process of claim 1 wherein said reaction mixture contains powdered, natural, or synthetic ferrierite seeds in a concentration of 0.1 to 10% by weight.
Claim 4
Dependent Claim
14 words
The process of claim 1 wherein said heating step is conducted at superatmospheric pressure.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein said reaction is conducted at autogenous pressure.
Claim 6
Dependent Claim
22 words
The process of claim 1 wherein the reaction mixture has the formula: 0.5-1.5 Li.sub.2 O:0.25-1.5 BaO:Al.sub.2 O.sub.3 :6-30 SiO.sub.2 :50-600 H.sub.2 O
Claim 7
Dependent Claim
23 words
The process of claim 1 wherein the reaction mixture has the formula: 0.5-1.5 Li.sub.2 O:0.5-1.5 K.sub.2 O:Al.sub.2 O.sub.3 :6-30 SiO.sub.2 :50-600 H.sub.2 O
Claim 8
Dependent Claim
27 words
The process of claim 1 wherein the Group I and/or Group II cations are derived from hydroxides of sodium, potassium, rubidium, caesium, magnesium, barium, strontium, and calcium.
Claim 9
Dependent Claim
50 words
In a process for preparing synthetic ferrierite wherein an alkaline reaction mixture containing Group I and/or Group II cations, a source of alumina, a source of silica, water and powdered ferrierite seeds is heated to form ferrierite, the improvement comprising: adding promotional amounts of lithium cations to the reaction mixture.
Claim 10
Dependent Claim
50 words
In a process for preparing synthetic ferrierite wherein an alkaline reaction mixture containing Group I and/or Group II cations, a source of alumina, a source of silica, water and powdered ferrierite seeds is heated to form ferrierite, the improvement comprising: adding promotional amounts of lithium cations to the reaction mixture.
Claim 11
Dependent Claim
23 words
The process according to claim 8, wherein the Group I and Group II cations are added to the reaction mixture as the hydroxides.
Claim 12
Dependent Claim
26 words
The process according to claim 8, wherein the reaction mixture contains powdered, natural or synthetic ferrierite seeds in a concentration of 0.1 to 10 weight percent.
Claim 13
Dependent Claim
17 words
The process according to claim 8, wherein the silica and alumina sources are silica and alumina sols.
Claim 14
Dependent Claim
35 words
The process according to claim 8, wherein the lithium cations are present in the reaction mixture in a concentration equal to 0.1 to 5 times the concentration of the Group I or Group II cations.
References Cited (Backward Citations)
US2882244A
Cited
US3966883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |