US4642226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of zeolite Beta using dibenzyldimethylammonium ions and the product produced
Assignee: Mobil Oil AS
•
Filing: 1985-03-29
•
Granted: 1987-02-10
•
Expires: 2005-03-29
Abstract
Abstract This invention relates to a new and improved form of crystalline silicate having the structure of zeolite Beta, 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
- 👤 Robert B. Calvert
- 👤 Clarence D. Chang
- 👤 Mae K. Rubin
- 👤 Ernest W. Valyocsik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:28
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; B01J29/7007; C; C01; C01B; C01B39/00; C01B39/02; C01B39/46; C01B39/48; B01J2229/00; B01J2229/10; B01J2229/20; B01J2229/26; B01J2229/30; B01J2229/42; Y; Y10; Y10S; Y10S423/00; Y10S423/27
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
128 words
A method for synthesizing a crystalline silicate consisting essentially of one having the structure of zeolite Beta which comprises (i) preparing a reaction mixture capable of forming said crystalline silicate, said mixture comprising sources of alkali metal ions (M), dibenzyldimethylammonium ions (R), an oxide of silicon, water and an oxide of aluminum and having a composition, in terms of mole ratios, within the following ranges: SiO 2 /Al 2 O 3 =20-250 H 2 O/SiO 2 =10-200 OH/SiO 2 =0.10-2.0 M/SiO 2 =0.05-1.0 R/SiO 2 =0.10-2.0, (ii) maintaining the reaction mixture at conditions sufficient to crystallize said silicate, including a temperature of from about 80° C. to about 175° C., and (iii) recovering said crystalline silicate from step (ii), said recovered crystalline silicate containing dibenzyldimethylammonium and alkali metal.
Claim 2
Independent Claim
128 words
A method for synthesizing a crystalline silicate consisting essentially of one having the structure of zeolite Beta which comprises (i) preparing a reaction mixture capable of forming said crystalline silicate, said mixture comprising sources of alkali metal ions (M), dibenzyldimethylammonium ions (R), an oxide of silicon, water and an oxide of aluminum and having a composition, in terms of mole ratios, within the following ranges: SiO 2 /Al 2 O 3 =20-250 H 2 O/SiO 2 =10-200 OH/SiO 2 =0.10-2.0 M/SiO 2 =0.05-1.0 R/SiO 2 =0.10-2.0, (ii) maintaining the reaction mixture at conditions sufficient to crystallize said silicate, including a temperature of from about 80° C. to about 175° C., and (iii) recovering said crystalline silicate from step (ii), said recovered crystalline silicate containing dibenzyldimethylammonium and alkali metal.
Claim 3
Dependent Claim
40 words
The method of claim 1 wherein said reaction mixture has a composition, in terms of mole ratios, as follows: SiO 2 /Al 2 O 3 =30-250 H 2 O/SiO 2 =10-60 OH/SiO 2 =0.12-1.0 M/SiO 2 =0.10-0.6 R/SiO 2 =0.20-1.0
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein said source of dibenzyldimethylammonium is a dibenzyldimethylammonium compound selected from the group consisting of the halide and hydroxide.
Claim 5
Dependent Claim
11 words
The method of claim 3 wherein said compound is the halide.
Claim 6
Dependent Claim
10 words
The method of claim 4 wherein said halide is chloride.
Claim 7
Dependent Claim
116 words
A crystalline silicate having the structure of zeolite Beta and containing dibenzyldimethylammonium and alkali metal synthesized by a method which comprises (i) preparing a reaction mixture capable of forming said crystalline silicate, said mixture comprising sources of alkali metal ions (M), dibenzyldimethylammonium ions (R), an oxide of silicon, water and an oxide of aluminum and having a composition in terms of mole ratios as follows: SiO 2 /Al 2 O 3 =20-250 H 2 O/SiO 2 =10-200 OH/SiO 2 =0.10-2.0 M/SiO 2 =0.05-1.0 R/SiO 2 =0.10-2.0, (ii) maintaining the reaction mixture at conditions sufficient to crystallize said silicate, and (iii) recovering said crystalline silicate from step (ii), said recovered crysalline silicate containing dibenzyldimethylammonium and alkali metal.
Claim 8
Dependent Claim
116 words
A crystalline silicate having the structure of zeolite Beta and containing dibenzyldimethylammonium and alkali metal synthesized by a method which comprises (i) preparing a reaction mixture capable of forming said crystalline silicate, said mixture comprising sources of alkali metal ions (M), dibenzyldimethylammonium ions (R), an oxide of silicon, water and an oxide of aluminum and having a composition in terms of mole ratios as follows: SiO 2 /Al 2 O 3 =20-250 H 2 O/SiO 2 =10-200 OH/SiO 2 =0.10-2.0 M/SiO 2 =0.05-1.0 R/SiO 2 =0.10-2.0, (ii) maintaining the reaction mixture at conditions sufficient to crystallize said silicate, and (iii) recovering said crystalline silicate from step (ii), said recovered crysalline silicate containing dibenzyldimethylammonium and alkali metal.
Claim 9
Dependent Claim
25 words
The synthetic crystalline silicate of claim 6 wherein said source of dibenzyldimethylammonium is a dibenzyldimethylammonium compound selected from the group consisting of halide and hydroxide.
Claim 10
Dependent Claim
13 words
The synthetic crystalline silicate of claim 7 wherein said compound is the halide.
Claim 11
Dependent Claim
11 words
The synthetic crystalline silicate of claim 6 wherein M is sodium.
Claim 12
Dependent Claim
66 words
The method of claim 1 comprising replacing alkali metal ions of the crystalline silicate recovered in step (ii), 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 13
Dependent Claim
15 words
The method of claim 10 wherein said replacing cation is hydrogen or a hydrogen precursor.
Claim 14
Dependent Claim
3 words
Dibenzyldimethylammonium-containing zeolite Beta.
Claim 15
Dependent Claim
3 words
Dibenzyldimethylammonium-containing zeolite Beta.
Claim 16
Dependent Claim
8 words
The dibenzyldimethylammonium-containing product crystalline silicate of claim 10.
Claim 17
Dependent Claim
8 words
The dibenzyldimethylammonium-containing product crystalline silicate of claim 11.
References Cited (Backward Citations)
US3308069A
Cited
US3699139A
Cited
US4296083A
Cited
US4287166A
Cited
US4552738A
Cited
US4585637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |