US4354024A
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Tungsten trioxide layered compounds
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1980-11-10
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Granted: 1982-10-12
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Expires: 2000-11-10
Abstract
Abstract A new composition of matter comprising layered compounds of tungsten trioxide and heterocyclic nitrogen or oxygen Lewis bases which have a unique layered structure. The layered compounds have the formula LWO 3 where L is a Lewis base selected from the group consisting of 5-membered heterocyclic amines, 6-membered heterocyclic amines, amine oxides, triorganophosphates, phosphine oxides and sulfoxides, the layered compounds being characterized in that L is covalently bound to a tungsten atom in the tungsten oxide layer.
Inventors
- 👤 Jack W. Johnson
- 👤 Allan J. Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:12
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/89; C07D487/00; C07D487/02; C07D487/08; C07F; C07F11/00; C07F11/005
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
74 words
A composition of matter comprising layered compounds containing WO 3 and nitrogen donor Lewis bases, said layered compounds having the formula ##STR11## wherein R is hydrogen; halogen; C 1 -C 20 aliphatic hydrocarbon; C 6 -C 10 aryl; C 7 -C 20 aralkyl; OR' or SR' where R' is C 1 -C 6 alkyl, the layered compounds being characterized in that ##STR12## is covalently bound to a tungsten atom in the tungsten oxide layer.
Claim 2
Dependent Claim
74 words
A composition of matter comprising layered compounds containing WO 3 and nitrogen donor Lewis bases, said layered compounds having the formula ##STR11## wherein R is hydrogen; halogen; C 1 -C 20 aliphatic hydrocarbon; C 6 -C 10 aryl; C 7 -C 20 aralkyl; OR' or SR' where R' is C 1 -C 6 alkyl, the layered compounds being characterized in that ##STR12## is covalently bound to a tungsten atom in the tungsten oxide layer.
Claim 3
Dependent Claim
62 words
A composition of matter comprising layered compounds containing WO 3 and nitrogen donor Lewis bases, said compounds having the formula LWO 3 where L is a Lewis base selected from the group consisting of pyridine, pyridazine, pyrimidine, pyrazine, triazine, and N-methyl imidazole, the layered compounds being characterized in that L is covalently bound to a tungsten atom in the tungsten oxide layer.
Claim 4
Dependent Claim
62 words
A composition of matter comprising layered compounds containing WO 3 and nitrogen donor Lewis bases, said compounds having the formula LWO 3 where L is a Lewis base selected from the group consisting of pyridine, pyridazine, pyrimidine, pyrazine, triazine, and N-methyl imidazole, the layered compounds being characterized in that L is covalently bound to a tungsten atom in the tungsten oxide layer.
Claim 5
Dependent Claim
80 words
A composition of matter comprising bridged layered compounds containing WO 3 and nitrogen donor Lewis bases, said layered compounds having the formula ##STR13## where n is 0 or 1 and R 2 is methylene or alkylene, alkenylene or alkynylene of 2-6 carbon atoms; C 6 -C 10 arylene; C 7 -C 14 aralkylene; oxygen or sulfur, the bridged layered compounds being characterized in that the nitrogen donor Lewis base is covalently bound to tungsten atoms in separate tungsten oxide layers.
Claim 6
Dependent Claim
80 words
A composition of matter comprising bridged layered compounds containing WO 3 and nitrogen donor Lewis bases, said layered compounds having the formula ##STR13## where n is 0 or 1 and R 2 is methylene or alkylene, alkenylene or alkynylene of 2-6 carbon atoms; C 6 -C 10 arylene; C 7 -C 14 aralkylene; oxygen or sulfur, the bridged layered compounds being characterized in that the nitrogen donor Lewis base is covalently bound to tungsten atoms in separate tungsten oxide layers.
Claim 7
Dependent Claim
27 words
The composition of claim 3 wherein R 2 is methylene; alkylene of 2-6 carbon atoms; paraphenylene; ##STR14## where p is from 1 to 6; oxygen or sulfur.
Claim 8
Dependent Claim
11 words
The composition of claim 3 wherein the layered compound is ##STR15##
Claim 9
Dependent Claim
45 words
The composition of claims 1, 2 or 3 wherein the Lewis base has the steric requirement such that the maximum cross-sectional area of the Lewis base perpendicular to an axis running through the Lewis base-W covalent bond is less than about 30 (A) 2 .
Claim 10
Dependent Claim
7 words
The composition of claim 1 wherein ##STR16##
Claim 11
Dependent Claim
27 words
A compositon of matter comprising layered compounds of the formula ##STR17## characterized in that pyridine is covalently bound to a tungsten atom in the tungsten oxide layer.
Claim 12
Dependent Claim
27 words
A compositon of matter comprising layered compounds of the formula ##STR17## characterized in that pyridine is covalently bound to a tungsten atom in the tungsten oxide layer.
Claim 13
Independent Claim
48 words
A method for preparing the layered compounds of claims 1, 2 or 3 which comprises contacting H 2 WO 4 and Lewis base with activated molecular sieves in a sealed tube and heating at temperatures of from about 100° C. to 400° C. for up to 40 days.
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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) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |