US4654462A
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Metathesis of olefins with a catalyst based upon a tungsten complex
Assignee: NATIONALE ELF AQUITAINE TOUR ELF 2 PLACE de la COUPOLE LA DEFENSE 6 92400 COUREBEVOIE FRANCE Ste
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Filing: 1986-02-06
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Granted: 1987-03-31
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Expires: 2006-02-06
Abstract
Abstract Improved process of metathesis of olefins by contact of one or more olefins with a catalyst comprising a tungsten complex with two phenoxy groups, carrying substituents and four other ligands, the complex carrying as coordination groups a halogen atom, an alkyl radical and a carbene. The catalyst preferably is of the formula <IMAGE> where X is halogen, R is hydrocarbon or an electronegative group or atom, R1 is alkyl and R2 and R3 are individually hydrogen or alkyl groups.
Inventors
- 👤 Jean M. Basset
- 👤 Michel Leconte
- 👤 Jean Ollivier
- 👤 Francoise Quignard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:47
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; B; B01; B01J; B01J31/00; B01J31/02; B01J31/0201; B01J31/0211; B01J31/0214; B01J31/12; B01J31/122; B01J31/16; B01J31/22; B01J31/2265; B01J2231/00; B01J2231/50; B01J2231/54; B01J2231/543; B01J2531/00; B01J2531/60; B01J2531/66; B01J31/2204; B01J31/2208; B01J31/2226; B01J31/26; B01J31/34; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/22
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
70 words
Improved process for the metathesis of olefins comprising contact of at least one olefin with a catalyst characterised in that the catalyst is of the formula ##STR19## where X is a halogen, R is a hydrocarbon group or an electronegative group or atom, R 1 is an alkyl group, and R 2 and R 3 individually are hydrogen atoms or straight or branched C 1 to C 8 alkyl groups.
Claim 2
Dependent Claim
70 words
Improved process for the metathesis of olefins comprising contact of at least one olefin with a catalyst characterised in that the catalyst is of the formula ##STR19## where X is a halogen, R is a hydrocarbon group or an electronegative group or atom, R 1 is an alkyl group, and R 2 and R 3 individually are hydrogen atoms or straight or branched C 1 to C 8 alkyl groups.
Claim 3
Dependent Claim
34 words
Process according to claim 1, characterized in that at least one molecule of an ether R 4 --O--R 4 is complexed in the catalyst, R 4 being a C 2 to C 6 alkyl.
Claim 4
Dependent Claim
12 words
Process according to claim 2 wherein R 4 is ethyl or isopropyl.
Claim 5
Dependent Claim
34 words
Process according to claim 1, characterised in that at least one molecule of dioxane or an ether ##STR20## is complexed in the catalyst, where n is an integer of 0 to 6 and m=1.
Claim 6
Dependent Claim
36 words
Process according to claim 1, characterized in that the catalyst is employed without any co-catalyst between 0° and 100° C. and the proportion of olefin is from 30 to 300 moles per atom of W present.
Claim 7
Dependent Claim
24 words
Process according to claim 5 wherein said temperature is 50°-95° C. and the proportion of olefin is 50-150 moles per atom of W present.
Claim 8
Dependent Claim
17 words
Process according to claim 1 characterised in that the catalyst is employed with a Lewis acid co-catalyst.
Claim 9
Dependent Claim
22 words
Process according to claim 7 characterized in that said co-catalyst is an organo aluminum, tin, lead, magnesium or titanium compound Lewis acid.
Claim 10
Dependent Claim
14 words
Process according to claim 1 wherein R 1 is a C 1-8 alkyl group.
Claim 11
Dependent Claim
43 words
Process according to claim 1 characterized in that R is phenyl, methyl, Cl or F, R 1 is neopentyl, R 2 is tert-butyl, R 3 is hydrogen and said catalyst contains complexed therein at least one molecule of diethyl ether or diisopropyl ether.
Claim 12
Dependent Claim
59 words
Catalyst for carrying out the metathesis comprising a diphenoxy tungsten complex, characterised by the structure ##STR21## where X is a halogen, R is a hydrocarbon group or an electro-negative group or atom, R 1 is an alkyl group, and R 2 and R 3 individually are hydrogen atoms or straight or branched C 1 to C 8 alkyl groups.
Claim 13
Dependent Claim
59 words
Catalyst for carrying out the metathesis comprising a diphenoxy tungsten complex, characterised by the structure ##STR21## where X is a halogen, R is a hydrocarbon group or an electro-negative group or atom, R 1 is an alkyl group, and R 2 and R 3 individually are hydrogen atoms or straight or branched C 1 to C 8 alkyl groups.
Claim 14
Dependent Claim
45 words
Catalyst according to claim 11, characterised in that a mole of ether R 4 OR 4 or ##STR22## is combined with the molecule of the complex, R 4 being a C 2 to C 6 alkyl, n being 0 to 6 and m=1 or 2.
Claim 15
Dependent Claim
32 words
Catalyst according to claim 11, characterised in that R is phenyl, methyl, Cl or F R 1 is a neopentyl, R 2 is a tert-butyl and R 3 is a hydrogen atom.
Claim 16
Dependent Claim
15 words
Catalyst according to claim 12, characterised in that R 4 is ethyl or an isopropyl.
Claim 17
Dependent Claim
37 words
Process of preparation of a complex catalyst according to claim 11, characterised in that Mg(CHR'R") 2 wherein R' and R" are H or alkyl is reacted with a tetra-halogeno complex of di-phenoxy tungsten ##STR23## in an ether.
Claim 18
Dependent Claim
12 words
Catalyst according to claim 11 wherein R 1 is C 1-8 alkyl.
Claim 19
Dependent Claim
26 words
Catalyst according to claim 13 characterized in that a mole of diethyl ether or diisopropyl ether is combined with the molecule of the diphenoxy tungsten complex.
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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) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |