US3972983A
Expired / Lapsed
US
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Crystalline zeolite ZSM-20 and method of preparing same
Assignee: Mobil Oil AS
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Filing: 1974-11-25
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Granted: 1976-08-03
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Expires: 1994-11-25
Abstract
Abstract A new crystalline zeolite, designated ZSM-20, a method of making same and the use thereof in catalytic conversion of organic compounds, e.g. hydrocarbons, is the subject of this application. The new zeolite has a composition expressed in terms of mole ratios of oxides in the anhydrous state as follows:
Inventors
- 👤 Julius Ciric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:12
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; C01; C01B; C01B39/00; C01B39/02; C01B39/20; C01B39/205; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/16; Y; Y10; Y10S; Y10S423/00; Y10S423/33
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
68 words
A synthetic crystalline aluminosilicate zeolite having a composition expressed in terms of mole ratios of oxides in the anhydrous state as follows: (0.3-0.6)R.sub.2 O; (0.4-0.7)M.sub.2 O: Al.sub.2 O.sub.3 : (x)SiO.sub.2 wherein R is a tetraethylammonium cation, M is an alkali metal cation and x is at least 7, and having an X-ray powder diffraction pattern which shows the significant lines set forth in Table 1 of the specification.
Claim 2
Dependent Claim
68 words
A synthetic crystalline aluminosilicate zeolite having a composition expressed in terms of mole ratios of oxides in the anhydrous state as follows: (0.3-0.6)R.sub.2 O; (0.4-0.7)M.sub.2 O: Al.sub.2 O.sub.3 : (x)SiO.sub.2 wherein R is a tetraethylammonium cation, M is an alkali metal cation and x is at least 7, and having an X-ray powder diffraction pattern which shows the significant lines set forth in Table 1 of the specification.
Claim 3
Dependent Claim
34 words
A synthetic crystalline aluminosilicate zeolite according to claim 1 having a composition in the anhydrous state, expressed in terms of mole ratios of oxides as follows: (0.3-0.6)R.sub.2 O: (0.4-0.7)M.sub.2 O: Al.sub.2 O.sub.3 : (7-10)SiO.sub.2.
Claim 4
Dependent Claim
13 words
A synthetic crystalline aluminosilicate zeolite according to claim 1 wherein M is sodium.
Claim 5
Dependent Claim
13 words
A synthetic crystalline aluminosilicate zeolite according to claim 2 wherein M is sodium.
Claim 6
Dependent Claim
100 words
A method for preparing the crystalline aluminosilicate zeolite defined in claim 1 which comprises preparing a mixture containing sources of an alkali metal oxide, a tetraethylammonium oxide, an oxide of aluminum, an oxide of silicon and water and having a composition, in terms of mole ratios of oxides, falling within the following ranges: M.sup.+ + R.sup.+
5-10
M.sup.+
H.sub.2 O/SiO.sub.2
10-20
H.sub.2 O/OH.sup.-
15-30
SiO.sub.2 /Al.sub.2 O.sub.3
30-32 wherein R is a tetraethylammonium cation and M is an alkali metal ion, maintaining the mixture at a temperature of at least 50° C. until the crystals of said aluminosilicate are formed.
Claim 7
Dependent Claim
38 words
The method of claim 5 wherein the mixture has a composition, in terms of mole ratios of oxides, falling within the following ranges: M.sup.+ + R.sup.+
6-7
M.sup.+
H.sub.2 O/SiO.sub.2
12-14
H.sub.2 O/OH.sup.-
19-21
SiO.sub.2 /Al.sub.2 O.sub.3
30.5-31.5.
Claim 8
Dependent Claim
20 words
The method according to claim 5 wherein the temperature is maintained between from about 50° C. to about 150° C.
Claim 9
Dependent Claim
20 words
The method according to claim 6 wherein the temperature is maintained between from about 90° C. to about 120° C.
Claim 10
Dependent Claim
65 words
A synthetic crystalline aluminosilicate zeolite comprising the zeolite of claim 3 having its original cations replaced, 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, aluminum, and metals from Groups IIA, IIIA, IVA, IB, IIB, IIIB, IVB, VIB and VIII of the Periodic Table of Elements.
Claim 11
Dependent Claim
17 words
The synthetic crystalline aluminosilicate zeolite of claim 9 wherein said replacing cations are hydrogen or hydrogen precursors.
Claim 12
Dependent Claim
16 words
The synthetic crystalline aluminosilicate zeolite of claim 9 wherein said replacing cations are rare earth metals.
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) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |