Patent US4925822A successfully refreshed from Google Patents.
US4925822A
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Disproportionation catalyst and process
Assignee: Shell USA Inc
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Filing: 1989-03-30
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Granted: 1990-05-15
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Expires: 2009-03-30
Abstract
Abstract This invention relates to a catalyst composition prepared by reacting in a hydrocarbon solvent a molybdenum or tungsten halide with siloxyalane selected from [(CH 3 CH 2 ) 2 AlO] 2 SiR 2 and (R' 3 SiO) 2 AlCH 2 CH 3 wherein R and R' are aryl or C 1 -C 5 alkyl. Preferably the halide is tungsten hexachloride, R is phenyl and R' is ethyl. The instant compositions are particularly useful as olefin disproportionation catalysts.
Inventors
- 👤 Lynn H. Slaugh
- 👤 Thomas H. Johnson
- 👤 Ronald J. Hoxmeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:58
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; B; B01; B01J; B01J31/00; B01J31/02; B01J31/12; B01J31/14; B01J31/143
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
51 words
A catalyst composition prepared by reacting in a hydrocarbon solvent a molybdenum or tungsten halide with a siloxyalane selected from [(CH 3 CH 2 ) 2 AlO] 2 SiR 2 and (R' 3 SiO) 2 AlCH 2 CH 3 wherein R and R' are aryl or C 1 -C 5 alkyl.
Claim 2
Dependent Claim
51 words
A catalyst composition prepared by reacting in a hydrocarbon solvent a molybdenum or tungsten halide with a siloxyalane selected from [(CH 3 CH 2 ) 2 AlO] 2 SiR 2 and (R' 3 SiO) 2 AlCH 2 CH 3 wherein R and R' are aryl or C 1 -C 5 alkyl.
Claim 3
Dependent Claim
15 words
The catalyst of claim 1 wherein the halide is selected from chloride, bromide and iodide.
Claim 4
Dependent Claim
10 words
The catalyst of claim 2 wherein the halide is chloride.
Claim 5
Dependent Claim
11 words
The catalyst of claim 3 wherein the halide is tungsten halide.
Claim 6
Dependent Claim
11 words
The catalyst of claim 4 wherein the halide is tungsten hexachloride.
Claim 7
Dependent Claim
13 words
The catalyst of claim 5 wherein R is phenyl and R' is ethyl.
Claim 8
Dependent Claim
23 words
The catalyst of claim 1 wherein the molar ratio of molybdenum or tungsten halide to siloxyalane ranges from about 1:10 to about 10:1.
Claim 9
Dependent Claim
23 words
The catalyst of claim 7 wherein the molar ratio of molybdenum or tungsten halide to siloxyalane ranges from about 1:5 to about 5:1.
Claim 10
Dependent Claim
23 words
The catalyst of claim 8 wherein the molar ratio of molybdenum or tungsten halide to siloxyalane ranges from about 1:2 to about 2:1.
Claim 11
Dependent Claim
21 words
The catalyst of claim 6 wherein the molar ratio of tungsten halide to siloxyalane ranges from about 1:10 to about 10:1.
Claim 12
Dependent Claim
21 words
The catalyst of claim 10 wherein the molar ratio of tungsten halide to siloxyalane ranges from about 1:5 to about 5:1.
Claim 13
Dependent Claim
21 words
The catalyst of claim 11 wherein the molar ratio of tungsten halide to siloxyalane ranges from about 1:2 to about 2:1.
Claim 14
Dependent Claim
22 words
The catalyst of claim 1 wherein the reaction is carried out at a temperature ranging from 0° C. to about 50° C.
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) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |