US4894212A
Expired / Lapsed
US
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Synthesis of crystalline silicate ZSM-11
Assignee: Mobil Oil AS
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Filing: 1987-07-20
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Granted: 1990-01-16
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Expires: 2007-07-20
Abstract
Abstract A crystalline silicate having the structure of ZSM-11 is synthesized from a reaction mixture comprising a source of alkali metal cations (M), a source of silicon, octylamine (R), seed crystals of ZSM-11 and water, and having a composition, in terms of mole ratios, within the following ranges: <TABLE> a
Inventors
- 👤 John P. McWilliams
- 👤 Mae K. Rubin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:09
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/36; C01B39/365; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C01B37/00; C01B37/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
137 words
In a method for synthesizing a crystalline silicate having the structure of ZSM-11 exhibiting a characteristic X-ray diffraction pattern as shown in Table 1 of the specification, which comprises preparing a mixture capable of forming said silicate, said mixture comprising a source of alkali metal cations (M), a source of silicon and water, maintaining said mixture under sufficient conditions until crystals of said silicate are formed and recovering said crystalline silicate having the structure of ZSM-11, the improvement wheren said mixture further comprises octyalmine (R) and seed crystals of ZSM-11 structure, said mixture having a composition, in terms of mole ratios, within the following ranges: SiO 2 /Al 2 O 3 =40-2000 H 2 O/SiO 2 =5-50 OH -1 /SiO 2 =0.05-0.5 M/SiO 2 =0.05-0.5 R/SiO 2 =0.03-1.0 said recovered crystalline silicate containing said R and M.
Claim 2
Dependent Claim
137 words
In a method for synthesizing a crystalline silicate having the structure of ZSM-11 exhibiting a characteristic X-ray diffraction pattern as shown in Table 1 of the specification, which comprises preparing a mixture capable of forming said silicate, said mixture comprising a source of alkali metal cations (M), a source of silicon and water, maintaining said mixture under sufficient conditions until crystals of said silicate are formed and recovering said crystalline silicate having the structure of ZSM-11, the improvement wheren said mixture further comprises octyalmine (R) and seed crystals of ZSM-11 structure, said mixture having a composition, in terms of mole ratios, within the following ranges: SiO 2 /Al 2 O 3 =40-2000 H 2 O/SiO 2 =5-50 OH -1 /SiO 2 =0.05-0.5 M/SiO 2 =0.05-0.5 R/SiO 2 =0.03-1.0 said recovered crystalline silicate containing said R and M.
Claim 3
Dependent Claim
7 words
The recovered crystalline silicate of claim 1.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein said mixture comprises at least about 0.01 wt.% seed crystals of ZSM-11 structure.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein said mixture comprises at least about 0.1 wt.% seed crystals of ZSM-11 structure.
Claim 6
Dependent Claim
22 words
The method of claim 1 wherein said mixture comprises from about 1 wt.% to about 5 wt.% seed crystals of ZSM-11 structure.
Claim 7
Dependent Claim
19 words
The method of claim 1 wherein said source of silicon is a solid silica or an amorphous silica precipitate.
Claim 8
Dependent Claim
14 words
The method of claim 1 wherein said source of silicon is a solid silica.
Claim 9
Dependent Claim
15 words
The method of claim 1 wherein said source of silicon is an amorphous silica precipitate.
Claim 10
Dependent Claim
63 words
The method of claim 1 comprising replacing alkali metal cations of the recovered crystalline silicate, at least in part, by ion exchange with a cation or a mixture of cations selected from the group consisting of hydrogen and hydrogen precursors, rare earth metals, and metals from Groups IIA, IIIA, IVA, IB, IIB, IIIB, IVB, VIB and VIII of the Periodic Table of Elements.
Claim 11
Dependent Claim
15 words
The method of claim 9 wherein said replacing cation is hydrogen or a hydrogen precursor.
Claim 12
Dependent Claim
63 words
The method of claim 3 comprising replacing alkali metal cations of the recovered crystalline silicate, at least in part, by ion exchange with a cation or a mixture of cations selected from the group consisting of hydrogen and hydrogen precursors, rare earth metals, and metals from Groups IIA, IIIA, IVA, IB, IIB, IIIB, IVB, VIB and VIII of the Periodic Table of Elements.
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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) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |