US4585638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of crystalline silicate ZSM-5
Assignee: Mobil Oil AS
•
Filing: 1984-07-16
•
Granted: 1986-04-29
•
Expires: 2004-07-16
Abstract
Abstract This invention relates to a new form of crystalline silicate identified as zeolite ZSM-5, to a new method for 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
- 👤 Gunter H. Kuhl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:17
CPC Classifications
C; C01; C01B; C01B37/00; C01B37/02; C01B39/00; C01B39/02; C01B39/36; C01B39/38; C01B39/40; Y; Y10; Y10S; Y10S423/00; Y10S423/22
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
177 words
A method for synthesizing a crystalline silicate ZSM- 5 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 comprising sources of alkali metal cations, hexaalkylhexamethylenediammonium cations, an oxide of silicon, and water and having a composition, in terms of mole ratios, within the following ranges: SiO 2 /Al 2 O 3 : 25 to ∞ H 2 O/SiO 2 : 0.2 to 120 OH - /SiO 2 : 0.02 to 0.50 (M 2 O+RO)/SiO 2 : 0.02 to 2.0 RO/(RO+M 2 O): 0.2 to 0.95 wherein M is said alkali metal cation and R is said hexaalkylhexamethylenediammonium cation, alkyl being propyl, butyl or a mixture thereof, (ii) maintaining the mixture at a temperature of from about 90° C. to about 225° C. until crystals of the crystalline silicate are formed and (iii) recovering the crystalline silicate ZSM-5 from step (ii), said recovered crystalline silicate containing alkali metal and hexaalkylhexamethylenediammonium cations, alkyl being propyl, butyl or a mixture thereof.
Claim 2
Independent Claim
177 words
A method for synthesizing a crystalline silicate ZSM- 5 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 comprising sources of alkali metal cations, hexaalkylhexamethylenediammonium cations, an oxide of silicon, and water and having a composition, in terms of mole ratios, within the following ranges: SiO 2 /Al 2 O 3 : 25 to ∞ H 2 O/SiO 2 : 0.2 to 120 OH - /SiO 2 : 0.02 to 0.50 (M 2 O+RO)/SiO 2 : 0.02 to 2.0 RO/(RO+M 2 O): 0.2 to 0.95 wherein M is said alkali metal cation and R is said hexaalkylhexamethylenediammonium cation, alkyl being propyl, butyl or a mixture thereof, (ii) maintaining the mixture at a temperature of from about 90° C. to about 225° C. until crystals of the crystalline silicate are formed and (iii) recovering the crystalline silicate ZSM-5 from step (ii), said recovered crystalline silicate containing alkali metal and hexaalkylhexamethylenediammonium cations, alkyl being propyl, butyl or a mixture thereof.
Claim 3
Dependent Claim
58 words
The method of claim 1 wherein said mixture has a composition, in terms of mole ratios, as follows: SiO 2 /Al 2 O 3 : 40 to 5000 H 2 O/SiO 2 : 5 to 60 OH - /SiO 2 : 0.05 to 0.4 (M 2 O+RO)/SiO 2 : 0.05 to 1.5 RO/(RO+M 2 O): 0.25 to 0.85.
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
9 words
The recovered crystalline silicate ZSM-5 product of claim 1.
Claim 9
Dependent Claim
9 words
The recovered crystalline silicate ZSM-5 product of claim 2.
Claim 10
Dependent Claim
9 words
The hexaalkylhexamethylenediammonium-containing crystalline silicate ZSM-5 product of claim 3.
Claim 11
Dependent Claim
9 words
The hexaalkylhexamethylenediammonium-containing crystalline silicate ZSM-5 product of claim 4.
Claim 12
Dependent Claim
9 words
The hexaalkylhexamethylenediammonium-containing crystalline silicate ZSM-5 product of claim 5.
Claim 13
Dependent Claim
9 words
The hexaalkylhexamethylenediammonium-containing crystalline silicate ZSM-5 product of claim 6.
Claim 14
Dependent Claim
11 words
Hexaalkylhexamethylenediammonium-containing ZSM-5 silicate, alkyl being propyl, butyl or a mixture thereof.
Claim 15
Dependent Claim
11 words
Hexaalkylhexamethylenediammonium-containing ZSM-5 silicate, alkyl being propyl, butyl or a mixture thereof.
References Cited (Backward Citations)
US3702886A
Cited
US4139600A
Cited
EP0042220A1
Cited
GB2077709A
Cited
EP0051318A1
Cited
US4427788A
Cited
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 |