Patent US4285922A successfully refreshed from Google Patents.
US4285922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing crystalline zeolite
Assignee: Mobil Oil AS
•
Filing: 1979-09-10
•
Granted: 1981-08-25
•
Expires: 1999-09-10
Abstract
Abstract A method of preparing zeolite ZSM-5 type crystals and mixtures thereof which comprises crystallizing the substantially pure zeolite material from a silica and, optionally, alumina gel mixture in the presence of an alkylammonium-N-oxide cation, and the products produced thereby.
Inventors
- 👤 Costandi A. Audeh
- 👤 Ernest W. Valyocsik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:31
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0234; B01J31/0235; B01J31/0254; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2876; C01B37/00; C01B37/02; Y; Y10; Y10S; Y10S423/00; Y10S423/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
134 words
A method for preparing a synthetic crystalline zeolite material having a constraint index between 1 and 12 and and a SiO 2 /Al 2 O 3 ratio greater than 15 which comprises preparing a reaction mixture containing a source of an alkali metal oxide, an oxide of silicon, an oxide of aluminum, RNO, and water, and having a composition, in terms of mole ratios of oxides, falling within the following ranges: SiO 2 /Al 2 O 3 =5 to ∞ H 2 O/SiO 2 =5 to 200 OH - /SiO 2 =0 to 1.0 M/SiO 2 =0.01 to 3.0 RNO/SiO 2 =0.01 to 2.0 wherein M is an alkali or alkaline earth metal and RNO 1-alkyl, 4-aza, 1-azonia-bicyclo(2,2,2)octane, 4-oxide, halide and maintaining said mixture under crystallization conditions until crystals of said zeolite are formed.
Claim 2
Independent Claim
134 words
A method for preparing a synthetic crystalline zeolite material having a constraint index between 1 and 12 and and a SiO 2 /Al 2 O 3 ratio greater than 15 which comprises preparing a reaction mixture containing a source of an alkali metal oxide, an oxide of silicon, an oxide of aluminum, RNO, and water, and having a composition, in terms of mole ratios of oxides, falling within the following ranges: SiO 2 /Al 2 O 3 =5 to ∞ H 2 O/SiO 2 =5 to 200 OH - /SiO 2 =0 to 1.0 M/SiO 2 =0.01 to 3.0 RNO/SiO 2 =0.01 to 2.0 wherein M is an alkali or alkaline earth metal and RNO 1-alkyl, 4-aza, 1-azonia-bicyclo(2,2,2)octane, 4-oxide, halide and maintaining said mixture under crystallization conditions until crystals of said zeolite are formed.
Claim 3
Dependent Claim
64 words
A method according to claim 1 wherein said mixture has a composition, in terms of mole ratios of oxides, falling within the following ranges: SiO 2 /Al 2 O 3 =10 to 10,000 H 2 O/SiO 2 =10 to 100 OH - /SiO 2 =0.1 to 0.5 M/SiO 2 =0.1 to 1.0 RNO/SiO 2 =0.1 to 1.0 wherein M and RNO are as before.
Claim 4
Dependent Claim
28 words
A method according to claim 1 wherein said SiO 2 /Al 2 O 3 ratio is between about 5 and 90 and said zeolite material further comprises ZSM-5.
Claim 5
Dependent Claim
20 words
A method according to claim 1 wherein said SiO 2 /Al 2 O 3 ratio is between 300 and 20,000.
Claim 6
Dependent Claim
21 words
A method according to claim 1 wherein said SiO 2 /Al 2 O 3 ratio is between about 90 and 500.
Claim 7
Dependent Claim
28 words
A method according to claim 2 wherein said SiO 2 /Al 2 O 3 ratio is between about 5 and 90 and said zeolite material further comprises ZSM-5.
Claim 8
Dependent Claim
20 words
A method according to claim 2 wherein said SiO 2 /Al 2 O 3 ratio is between 300 and 20,000.
Claim 9
Dependent Claim
21 words
A method according to claim 2 wherein said SiO 2 /Al 2 O 3 ratio is between about 90 and 500.
Claim 10
Independent Claim
22 words
A method according to claims 1, 2, 3, 4, 5, 6, 7 or 8 wherein the 1-alkyl group is methyl or propyl.
Claim 11
Dependent Claim
12 words
A method according to claim 1 wherein substantially no alumina is present.
References Cited (Backward Citations)
US3038903A
Cited
US3247195A
Cited
US3459676A
Cited
US3692470A
Cited
US3702886A
Cited
US4175114A
Cited
US4061717A
Cited
US4079014A
Cited
US4100262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |