US4640829A
Expired / Lapsed
US
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Synthesis of crystalline silicate ZSM-50 using dibenzyldimethylammonium ions and the product produced
Assignee: Mobil Oil AS
•
Filing: 1985-08-30
•
Granted: 1987-02-03
•
Expires: 2005-08-30
Abstract
Abstract This invention relates to a new and improved form of crystalline silicate having the structure of zeolite ZSM-50, 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
- 👤 Mae K. Rubin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:49
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; B01J29/7023; C; C01; C01B; C01B37/00; C01B37/02; C01B39/00; C01B39/02; C01B39/46; C01B39/48
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
146 words
A method for synthesizing a crystalline silicate consisting essentially of one having the structure of ZSM-50 and exhibiting a characteristic X-ray diffraction pattern as shown in Table 1 of the specification, which comprises (i) forming a reaction mixture capable of forming said crystalline silicate, said mixture comprising sources of alkali metal ions, dibenzyldimethylammonium ions, an oxide of silicon, water and an oxide of aluminum, said reaction mixture having a composition, in terms of mole ratios, within the following ranges: ______________________________________
SiO.sub.2 /Al.sub.2 O.sub.3
= >250
H.sub.2 O/SiO.sub.2 = 5-30
OH.sup.- /SiO.sub.2 = 0.08-0.3
M/SiO.sub.2 = 0.08-0.3
R/SiO.sub.2 = 0.05-1.0
______________________________________ wherein M is said alkali metal ion and R is said dibenzyldimethylammonium ion, (ii) maintaining the reaction mixture at conditions sufficient to crystallize said silicate, and (iii) recovering the crystalline silicate having the structure of ZSM-50, said recovered crystalline silicate containing alkali metal and dibenzyldimethylammonium ions.
Claim 2
Independent Claim
146 words
A method for synthesizing a crystalline silicate consisting essentially of one having the structure of ZSM-50 and exhibiting a characteristic X-ray diffraction pattern as shown in Table 1 of the specification, which comprises (i) forming a reaction mixture capable of forming said crystalline silicate, said mixture comprising sources of alkali metal ions, dibenzyldimethylammonium ions, an oxide of silicon, water and an oxide of aluminum, said reaction mixture having a composition, in terms of mole ratios, within the following ranges: ______________________________________
SiO.sub.2 /Al.sub.2 O.sub.3
= >250
H.sub.2 O/SiO.sub.2 = 5-30
OH.sup.- /SiO.sub.2 = 0.08-0.3
M/SiO.sub.2 = 0.08-0.3
R/SiO.sub.2 = 0.05-1.0
______________________________________ wherein M is said alkali metal ion and R is said dibenzyldimethylammonium ion, (ii) maintaining the reaction mixture at conditions sufficient to crystallize said silicate, and (iii) recovering the crystalline silicate having the structure of ZSM-50, said recovered crystalline silicate containing alkali metal and dibenzyldimethylammonium ions.
Claim 3
Dependent Claim
37 words
The method of claim 1 wherein said reaction mixture has a composition, in terms of mole ratios, as follows: ______________________________________
SiO.sub.2 /Al.sub.2 O.sub.3
= >250-1200
H.sub.2 O/SiO.sub.2 = 8-15
OH.sup.- /SiO.sub.2 0.09-0.2
M/SiO.sub.2 0.09-0.2
R/SiO.sub.2 0.08-0.67
______________________________________
Claim 4
Dependent Claim
66 words
The method of claim 1 comprising replacing alkali metal ions 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 ions 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- 50 product of claim 1.
Claim 9
Dependent Claim
9 words
The recovered crystalline silicate ZSM-50 product of claim 2.
Claim 10
Dependent Claim
9 words
The dibenzyldimethylammonium-containing crystalline silicate ZSM-50 product of claim 3.
Claim 11
Dependent Claim
9 words
The dibenzyldimethylammonium-containing crystalline silicate ZSM-50 product of claim 4.
Claim 12
Dependent Claim
4 words
Dibenzyldimethylammonium-containing crystalline silicate ZSM-50.
Claim 13
Dependent Claim
4 words
Dibenzyldimethylammonium-containing crystalline silicate ZSM-50.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |