US4490342A
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Synthesis of ZSM-23 zeolite
Assignee: Mobil Oil AS
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Filing: 1983-04-29
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Granted: 1984-12-25
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Expires: 2003-04-29
Abstract
Abstract An improved method of synthesizing ZSM-23 zeolitic material is disclosed and claimed. The method comprises preparing a reaction mixture which comprises sources of an alkali metal, an oxide of aluminum (Al2O3), an oxide of silicon (SiO2), water and a nitrogen-containing organic cation R+, and having the following composition, in terms of mole ratios: -Broad Preferred -SiO2/Al2O3 40 to 5000 50 to 2000 -H2O/SiO2 5 to 200 20 to 100 -OH-/SiO2 0 to 0.60 0.10 to 0.40 -M+SiO2 0.01 to 2.0 0.10 to 1.0 -R+/SiO2 0.01 to 2.0 0.05 to 1.0 - wherein M+ is a cation of an alkali or alkaline earth metal and R+ is an organic cation of the formula (CH3)3N+-R1-N+(CH3)3 wherein R1 is a saturated or unsaturated straight chain hydrocarbon group having seven carbon atoms, and maintaining the mixture at crystallization conditions until crystals of the ZSM-23 zeolite are formed. Thereafter, the crystals are separated from the liquid and recovered.
Inventors
- 👤 Ernest W. Valyocsik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:27
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/46; C01B39/48; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/64; B01J2229/00; B01J2229/10; B01J2229/20; Y; Y10; Y10S; Y10S423/00; Y10S423/36
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
166 words
A process for preparing a ZSM-23 zeolite having an X-ray diffraction pattern of Table I, comprising preparing a reaction mixture which comprises sources of an alkali metal, an oxide of aluminum (Al 2 O 3 ), an oxide of silicon (SiO 2 ), water and a nitrogen-containing organic cation R + and having the following composition, in terms of mole ratios: SiO 2 /Al 2 O 3 =40 to 5000 H 2 O/SiO 2 =5 to 200 OH - /SiO 2 =0 to 0.60 M + /SiO 2 =0.01 to 2.0 R + /SiO 2 =0.01 to 2.0 wherein M + is a cation of an alkali or alkaline earth metal and R + is an organic cation of the formula (CH 3 ) 3 N + --R 1 --N + (CH 3 ) 3 wherein R 1 is a saturated or unsaturated straight chain hydrocarbon group having seven carbon atoms, and maintaining the mixture at crystallization conditions until crystals of the ZSM-23 zeolite are formed.
Claim 2
Dependent Claim
166 words
A process for preparing a ZSM-23 zeolite having an X-ray diffraction pattern of Table I, comprising preparing a reaction mixture which comprises sources of an alkali metal, an oxide of aluminum (Al 2 O 3 ), an oxide of silicon (SiO 2 ), water and a nitrogen-containing organic cation R + and having the following composition, in terms of mole ratios: SiO 2 /Al 2 O 3 =40 to 5000 H 2 O/SiO 2 =5 to 200 OH - /SiO 2 =0 to 0.60 M + /SiO 2 =0.01 to 2.0 R + /SiO 2 =0.01 to 2.0 wherein M + is a cation of an alkali or alkaline earth metal and R + is an organic cation of the formula (CH 3 ) 3 N + --R 1 --N + (CH 3 ) 3 wherein R 1 is a saturated or unsaturated straight chain hydrocarbon group having seven carbon atoms, and maintaining the mixture at crystallization conditions until crystals of the ZSM-23 zeolite are formed.
Claim 3
Dependent Claim
18 words
A process of claim 1 wherein R 1 is a straight chain hydrocarbon group containing three double bonds.
Claim 4
Dependent Claim
11 words
A process of claim 2 wherein R 1 is --CH═CH--CH.sub.2 --CH═CH--CH═CH--.
Claim 5
Dependent Claim
10 words
A process of claim 1 wherein R 1 is heptyl.
Claim 6
Dependent Claim
20 words
A process of claim 4 wherein the mole ratio of SiO 2 /Al 2 O 3 is 50 to 2000.
Claim 7
Dependent Claim
20 words
A process of claim 5 wherein the mole ratio of SiO 2 /Al 2 O 3 is 60 to 1000.
Claim 8
Dependent Claim
85 words
A synthetic crystalline ZSM-23 zeolite material in the as-synthesis form having a formula, in terms of moles of oxides, in the anhydrous state: (0.01-6)R.sub.2 O:(0-2)M.sub.2/n O:(0.02-5)Al.sub.2 O.sub.3 :(100)SiO.sub.2 wherein R 2 O is an oxide of a promoter, organic or inorganic salt thereof, the promoter being a cation of the formula (CH.sub.3).sub.3 N.sup.+ --R.sub.1 --N.sup.+ (CH.sub.3).sub.3 wherein R 1 is a saturated or unsaturated straight chain hydrocarbon group having seven carbon atoms and M is an alkali or alkaline earth metal having a valence n.
Claim 9
Dependent Claim
85 words
A synthetic crystalline ZSM-23 zeolite material in the as-synthesis form having a formula, in terms of moles of oxides, in the anhydrous state: (0.01-6)R.sub.2 O:(0-2)M.sub.2/n O:(0.02-5)Al.sub.2 O.sub.3 :(100)SiO.sub.2 wherein R 2 O is an oxide of a promoter, organic or inorganic salt thereof, the promoter being a cation of the formula (CH.sub.3).sub.3 N.sup.+ --R.sub.1 --N.sup.+ (CH.sub.3).sub.3 wherein R 1 is a saturated or unsaturated straight chain hydrocarbon group having seven carbon atoms and M is an alkali or alkaline earth metal having a valence n.
Claim 10
Dependent Claim
20 words
A ZSM-23 zeolite material of claim 7 wherein R 1 is a straight chain hydrocarbon group containing three double bonds.
Claim 11
Dependent Claim
14 words
A ZSM-23 zeolite material of claim 7 wherein R 1 is --CH═CH--CH 2 --CH═CH--CH═CH--.
Claim 12
Dependent Claim
12 words
A ZSM-23 zeolite material of claim 7 wherein R 1 is heptyl.
Claim 13
Dependent Claim
22 words
A ZSM-23 zeolite material of claim 10 wherein the mole ratio of SiO 2 /Al 2 O 3 is 40 to 1800.
Claim 14
Dependent Claim
22 words
A ZSM-23 zeolite material of claim 11 wherein the mole ratio of SiO 2 /Al 2 O 3 is 50 to 900.
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) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |