US4391785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of ZSM-12 type zeolites
Assignee: Mobil Oil AS
•
Filing: 1981-12-21
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Granted: 1983-07-05
•
Expires: 2001-12-21
Abstract
Abstract A new and useful improvement in the method for preparing synthetic crystalline aluminosilicate zeolite ZSM-12 is provided. The improved method comprises synthesizing ZSM-12 in the presence of cyclic quaternary amine halides as templates rather than the conventional template of tetraethylammonium.
Inventors
- 👤 Edward J. Rosinski
- 👤 Mae K. Rubin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:20
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; B01J29/7034; C; C01; C01B; C01B39/00; C01B39/02; C01B39/06; C01B39/08; C01B39/42; C01B39/46; C01B39/48; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/64; B01J2229/00; B01J2229/30; B01J2229/36; Y; Y10; Y10S; Y10S423/00; Y10S423/35
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
53 words
In a process for manufacturing synthetic zeolite ZSM-12 which process comprises crystallizing an aqueous forming solution comprising a source of silica and an nitrogenous template and recovering said zeolite ZSM-12, the improvement which comprises utilizing as said nitrogenous template a compound selected from the group consisting of dimethyl pyridinium and dimethyl pyrrolidinium halides.
Claim 2
Dependent Claim
53 words
In a process for manufacturing synthetic zeolite ZSM-12 which process comprises crystallizing an aqueous forming solution comprising a source of silica and an nitrogenous template and recovering said zeolite ZSM-12, the improvement which comprises utilizing as said nitrogenous template a compound selected from the group consisting of dimethyl pyridinium and dimethyl pyrrolidinium halides.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein said organic template is dimethyl pyridinium halide.
Claim 4
Dependent Claim
14 words
The process of claim 1 wherein said organic nitrogenous template is dimethyl pyrrolidinium halide.
Claim 5
Dependent Claim
95 words
A process for preparing zeolite ZSM-12 which comprises preparing a mixture containing sources of an alkali metal oxide and organic nitrogen containing oxide, an oxide of silicon with and without an oxide of aluminum and water and having a composition in terms of mole ratios of oxides falling within the following ranges: ______________________________________
OH.sup.- /SiO.sub.2 0.1-0.40
R/R+M+ 0.2-0.95
SiO.sub.2 /Al.sub.2 O.sub.3
40-∞
H.sub.2 O/OH.sup.- 20-300
______________________________________ wherein R is dimethyl pyrrolidinium or dimethyl pyridinium halide and M is an alkali metal ion and maintaining the mixture at elevated temperatures until crystals of ZSM-12 are formed.
Claim 6
Dependent Claim
95 words
A process for preparing zeolite ZSM-12 which comprises preparing a mixture containing sources of an alkali metal oxide and organic nitrogen containing oxide, an oxide of silicon with and without an oxide of aluminum and water and having a composition in terms of mole ratios of oxides falling within the following ranges: ______________________________________
OH.sup.- /SiO.sub.2 0.1-0.40
R/R+M+ 0.2-0.95
SiO.sub.2 /Al.sub.2 O.sub.3
40-∞
H.sub.2 O/OH.sup.- 20-300
______________________________________ wherein R is dimethyl pyrrolidinium or dimethyl pyridinium halide and M is an alkali metal ion and maintaining the mixture at elevated temperatures until crystals of ZSM-12 are formed.
Claim 7
Dependent Claim
11 words
The process of claim 4 wherein R is dimethyl pyrrolidinium halide.
Claim 8
Dependent Claim
11 words
The process of claim 4 wherein R is dimethyl pyridinium halide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |