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US5053373A
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Zeolite SSZ-32
Assignee: Chevron USA Inc
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Filing: 1989-10-24
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Granted: 1991-10-01
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Expires: 2009-10-24
Abstract
Abstract A crystalline zeolite SSZ-32 of novel composition is prepared using an N-lower alkyl-N'-isopropyl-imidazolium cation as a template. Also disclosed is a process for converting hydrocarbons with crystalline zeolite SSZ-32.
Inventors
- 👤 Stacey I. Zones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:06
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/46; C01B39/48; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
44 words
A zeolite having a mole ratio of silicon oxide to aluminum oxide greater than about 20:1 to less than 40:1, having a constraint index after calcination and in the hydrogen form of 13 or greater, and having the X-ray diffraction lines of Table 1.
Claim 2
Dependent Claim
44 words
A zeolite having a mole ratio of silicon oxide to aluminum oxide greater than about 20:1 to less than 40:1, having a constraint index after calcination and in the hydrogen form of 13 or greater, and having the X-ray diffraction lines of Table 1.
Claim 3
Dependent Claim
83 words
A zeolite having a composition, as synthesized and in the anhydrous state, in terms of mole ratios of oxides as follows: (0.05 to 2.0)Q 2 O:(0.1 to 2.0)M 2 O: Al 2 O 3 :(20 to less than 40) SiO 2 wherein M is an alkali metal cation, Q is an N-(C 1-5 ) lower alkyl-N'-isopropyl-imidazolium cation, said zeolite having a constraint index after calcination and in the hydrogen form of 13 or greater, and having the X-ray diffraction lines of Table 1.
Claim 4
Dependent Claim
83 words
A zeolite having a composition, as synthesized and in the anhydrous state, in terms of mole ratios of oxides as follows: (0.05 to 2.0)Q 2 O:(0.1 to 2.0)M 2 O: Al 2 O 3 :(20 to less than 40) SiO 2 wherein M is an alkali metal cation, Q is an N-(C 1-5 ) lower alkyl-N'-isopropyl-imidazolium cation, said zeolite having a constraint index after calcination and in the hydrogen form of 13 or greater, and having the X-ray diffraction lines of Table 1.
Claim 5
Dependent Claim
12 words
The zeolite according to claim 2 wherein Q is an N-methyl-N'-isopropyl-imidazolium cation.
Claim 6
Dependent Claim
12 words
The zeolite according to claim 2 wherein Q is an N,N'-diisopropyl-imidazolium cation.
Claim 7
Dependent Claim
21 words
A zeolite prepared by thermally treating the zeolite of claim 2 at a temperature from about 200° C. to 820° C.
Claim 8
Dependent Claim
25 words
The zeolite according to claim 1, or 2 wherein said mole ratio of silicon oxide to aluminum oxide is abort 25:1 to less than 37:1.
Claim 9
Dependent Claim
28 words
A zeolite according to claim 1, 2 or 5 which has undergone ion exchange with hydrogen, ammonium, rare earth metal, Group IIA metal, or Group VIII metal ions.
Claim 10
Dependent Claim
25 words
A zeolite according to claim 1, 2 or 5 wherein rare earth metals, Group IIA metals, or Group VIII metals are occluded in the zeolite.
Claim 11
Dependent Claim
16 words
A zeolite composition, comprising the zeolite of claim 1, 2 or 5 and an inorganic matrix.
Claim 12
Independent Claim
85 words
A method for preparing a zeolite having a mole ratio of silicon oxide to aluminum oxide greater than about 20:1 to less than 40:1, and having the X-ray diffraction lines of Table 1 which method comprises: (a) preparing an aqueous mixture containing sources of an alkali metal oxide, an N-lower alkyl-N'-isopropyl-imidazolium cation, an oxide of aluminum, and an oxide of silicon; (b) maintaining the mixture at a temperature of at least 140° C. until the crystals of said zeolite form; and (c) recovering said crystals.
Claim 13
Independent Claim
85 words
A method for preparing a zeolite having a mole ratio of silicon oxide to aluminum oxide greater than about 20:1 to less than 40:1, and having the X-ray diffraction lines of Table 1 which method comprises: (a) preparing an aqueous mixture containing sources of an alkali metal oxide, an N-lower alkyl-N'-isopropyl-imidazolium cation, an oxide of aluminum, and an oxide of silicon; (b) maintaining the mixture at a temperature of at least 140° C. until the crystals of said zeolite form; and (c) recovering said crystals.
Claim 14
Dependent Claim
49 words
The method according to claim 10 wherein the aqueous mixture has a composition in terms of mole ratios of oxides falling in the ranges: SiO 2 /Al 2 O 3 , 20:1 to less than 40:1; Q/SiO 2 , 0.05:1 to 0.50:1, and Q is an N-lower alkyl-N'-isopropyl-imidazolium cation.
Claim 15
Dependent Claim
24 words
The method according to claim 10 or 11 wherein the N-lower alkyl-N'-isopropyl-imidazolium cation is selected from the group consisting of N-methyl-N'-isopropyl-imidazolium or N,N'-diisopropyl-imidazolium cation.
Claim 16
Dependent Claim
23 words
The method according to claim 10 wherein said aluminum oxide source provides aluminum oxide which is in a covalently dispersed form on silica.
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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) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |