US4585747A
Expired / Lapsed
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Synthesis of crystalline silicate ZSM-48
Assignee: Mobil Oil AS
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Filing: 1984-06-27
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Granted: 1986-04-29
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Expires: 2004-06-27
Abstract
Abstract This invention relates to a new and improved form of crystalline silicate identified as zeolite ZSM-48, to a new and useful improvement in synthesizing said crystalline silicate and to use of said crystalline silicate prepared in accordance herewith as a catalyst for organic compound, e.g. hydrocarbon compound, conversion.
Inventors
- 👤 Ernest W. Valyocsik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:58
CPC Classifications
C; C01; C01B; C01B37/00; C01B37/02; C01B39/00; C01B39/02; C01B39/46; C01B39/48
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
139 words
A method for synthesizing a crystalline silicate ZSM- 48 exhibiting a characteristic X-ray diffraction pattern as shown in Table 1 of the specification, which comprises (i) preparing a mixture capable of forming said crystalline silicate, said mixture containing sources of alkali metal cations, bis(N-methylpyridyl)ethylinium cation, an oxide of silicon and water and having a composition, in terms of mole ratios, within the following ranges: ______________________________________
SiO.sub.2 /Al.sub.2 O.sub.3
above about 250
H.sub.2 O/SiO.sub.2
5-200
OH.sup.- /SiO.sub.2
0.01-2.0
M/SiO.sub.2 0.01-3.0
R/SiO.sub.2 0.02-1.5
______________________________________ wherein M is said alkali metal cation and R is said bis(N-methylpyridyl)ethylinium cation, (ii) maintaining the mixture at a temperature of from about 80° C. to about 250° C. until crystals of the crystalline silicate are formed and (iii) recovering the crystalline silicate ZSM-48 from step (ii), said recovered crystalline silicate containing alkali metal and bis(N-methylpyridyl)ethylinium cations.
Claim 2
Independent Claim
139 words
A method for synthesizing a crystalline silicate ZSM- 48 exhibiting a characteristic X-ray diffraction pattern as shown in Table 1 of the specification, which comprises (i) preparing a mixture capable of forming said crystalline silicate, said mixture containing sources of alkali metal cations, bis(N-methylpyridyl)ethylinium cation, an oxide of silicon and water and having a composition, in terms of mole ratios, within the following ranges: ______________________________________
SiO.sub.2 /Al.sub.2 O.sub.3
above about 250
H.sub.2 O/SiO.sub.2
5-200
OH.sup.- /SiO.sub.2
0.01-2.0
M/SiO.sub.2 0.01-3.0
R/SiO.sub.2 0.02-1.5
______________________________________ wherein M is said alkali metal cation and R is said bis(N-methylpyridyl)ethylinium cation, (ii) maintaining the mixture at a temperature of from about 80° C. to about 250° C. until crystals of the crystalline silicate are formed and (iii) recovering the crystalline silicate ZSM-48 from step (ii), said recovered crystalline silicate containing alkali metal and bis(N-methylpyridyl)ethylinium cations.
Claim 3
Dependent Claim
34 words
The method of claim 1 wherein said mixture has a composition, in terms of mole ratios, as follows: ______________________________________
SiO.sub.2 /Al.sub.2 O.sub.3
250-20,000
H.sub.2 O/SiO.sub.2
10-100
OH.sup.- /SiO.sub.2
0.2-1.0
M/SiO.sub.2 0.1-1.0
R/SiO.sub.2 0.05-0.6
______________________________________
Claim 4
Dependent Claim
66 words
The method of claim 1 comprising replacing alkali metal cations of the crystalline silicate recovered in step (iii), 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 5
Dependent Claim
66 words
The method of claim 2 comprising replacing alkali metal cations of the crystalline silicate recovered in step (iii), 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 6
Dependent Claim
15 words
The method of claim 3 wherein said replacing cation is hydrogen or a hydrogen precursor.
Claim 7
Dependent Claim
15 words
The method of claim 4 wherein said replacing cation is hydrogen or a hydrogen precursor.
Claim 8
Dependent Claim
10 words
The recovered crystalline silicate ZSM- 48 product of claim 1.
Claim 9
Dependent Claim
9 words
The recovered crystalline silicate ZSM-48 product of claim 2.
Claim 10
Dependent Claim
9 words
The bis(N-methylpyridyl)ethylinium-containing crystalline silicate ZSM-48 product of claim 3.
Claim 11
Dependent Claim
9 words
The bis(N-methylpyridyl)ethylinium-containing crystalline silicate ZSM-48 product of claim 4.
Claim 12
Dependent Claim
9 words
The bis(N-methylpyridyl)ethylinium-containing crystalline silicate ZSM-48 product of claim 5.
Claim 13
Dependent Claim
9 words
The bis(N-methylpyridyl)ethylinium-containing crystalline silicate ZSM-48 product of claim 6.
Claim 14
Dependent Claim
2 words
Bis(N-methylpyridyl)ethylinium-containing ZSM-48.
Claim 15
Dependent Claim
2 words
Bis(N-methylpyridyl)ethylinium-containing ZSM-48.
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) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |