US4639429A
Expired / Lapsed
US
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Catalyst for the metathesis of olefins
Assignee: Societe National Elf Aquitaine
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Filing: 1985-07-18
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Granted: 1987-01-27
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Expires: 2005-07-18
Abstract
Abstract Improved catalyst for the metathesis of olefins comprising a compound of W with a halogen and with a phenoxy group which can carry substituents. It contains 4 halogen atoms and 2 phenoxy groups per atom of W. Preferably, the phenoxy group is halogenated. This catalyst allows the more rapid carrying out of various types of metathesis reactions, when it is used as a co-catalyst in conjunction with organo-metallic compounds, particularly Al or Sn. Amongst others, it allows the economical preparation of pheromones. It is practically insensitive to traces of water and oxygen.
Inventors
- 👤 Jean M. M. Basset
- 👤 Michel Leconte
- 👤 Jean Ollivier
- 👤 Francoise Quignard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:53
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0201; B01J31/0211; B01J31/0214; B01J31/12; B01J31/122; B01J31/14; B01J31/143; C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; C07C67/00; C07C67/475; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08; B01J2231/00; B01J2231/50; B01J2231/54; B01J2231/543; B01J2531/00; B01J2531/60; B01J2531/66; B01J31/16; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2226; B01J31/26; B01J31/34; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
13 words
A di(2,6-dihalophenoxy)tungsten tetrahalide of the formula ##STR23## wherein X and X' are halogen.
Claim 2
Dependent Claim
13 words
A di(2,6-dihalophenoxy)tungsten tetrahalide of the formula ##STR23## wherein X and X' are halogen.
Claim 3
Dependent Claim
12 words
The tungsten tetrahalide of claim 1 wherein X and X' are chlorine.
Claim 4
Dependent Claim
12 words
The tungsten tetrahalide of claim 1 wherein X and X' are bromine.
Claim 5
Dependent Claim
19 words
The tungsten tetrahalide of claim 1 wherein one of X and X' is chlorine and the other is bromine.
Claim 6
Dependent Claim
24 words
A catalyst for the metathesis of olefins comprising the combination of an organoaluminum, organotin or organolead compound and the tungsten tetrahalide of claim 1.
Claim 7
Dependent Claim
12 words
The catalyst of claim 5 wherein the tungsten tetrahalide is di(2,6-dichlorophenoxy)tungsten tetrachloride.
Claim 8
Dependent Claim
49 words
The catalyst of claim 5 wherein said organoaluminum compound is of the formula R 3 Al,RAlX 2 ,R 2 AlX or R 3 Al 2 X 3 , or a mixture thereof, wherein R is a 1 to 6 carbon atom alkyl group and X is chlorine or bromine.
Claim 9
Dependent Claim
21 words
The catalyst according to claim 7 wherein said organoaluminum compound is trimethyl aluminum sesquichloride, ethyl aluminum dichloride or diethyl aluminum chloride.
Claim 10
Dependent Claim
37 words
The catalyst of claim 5 wherein the organotin compound is of the formula X n SnR 4-n wherein R is a 1 to 6 carbon atom alkyl group, X is halogen and n is 0 to 2.
Claim 11
Dependent Claim
12 words
The catalyst of claim 9 wherein the organotin compound is tetramethyl tin.
Claim 12
Dependent Claim
56 words
A catalyst according to claim 5 wherein said organolead compound is of the formula PbR' m X 4-m or Pb 2 R' a X 6-a wherein R' is a 1 to 18 carbon atom alkyl group or a 6 to 10 carbon atom aryl group, m is 2 to 4 and a is 2 to 6.
Claim 13
Dependent Claim
12 words
The catalyst of claim 11 wherein the organolead compound is tetrabutyl lead.
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) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |