US3956178A
Expired / Lapsed
US
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Three-component metathesis catalysts
Assignee: Montedison SpA
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Filing: 1974-02-13
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Granted: 1976-05-11
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Expires: 1994-02-13
Abstract
Abstract New three-component metathesis catalysts prepaed from a tungsten compound, an organic ligand and an organometallic compound of a metal belonging to Group I to IV of the Mendelyeev Periodic System are disclosed. More particularly, the disclosed catalysts are prepared from a tungsten oxychloride, an organic ligand containing a nitrile or ester group, and an organic aluminum compound.
Inventors
- 👤 Alberto Greco
- 👤 Franco Pirinoli
- 👤 Gino Dall'Asta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:27
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/12; B01J31/14; B01J31/143; B01J31/16; B01J31/18; B01J31/1805; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2213; B01J31/2226; C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; C07C6/06; 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; B01J31/26; B01J31/34; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
Catalysts for the metathesis of olefins and cycloolefins containing from 2 to 30 carbon atoms and prepared by mixing A. a catalyst-forming component which consists of a complex of a tungsten oxyhalide with (b) an organic ligand selected from the group consisting of phthalodinitrile, adiponitrile and ethyl phthalate, the molar ratio of (a) to (b) being from 1:0.5 to 1:10; with B. a catalyst-forming component which is an alkyl aluminium halide the molar ratio of (a) in component (A), the component (B), being from 1:1 to 1:5.
Claim 2
Dependent Claim
87 words
Catalysts for the metathesis of olefins and cycloolefins containing from 2 to 30 carbon atoms and prepared by mixing A. a catalyst-forming component which consists of a complex of a tungsten oxyhalide with (b) an organic ligand selected from the group consisting of phthalodinitrile, adiponitrile and ethyl phthalate, the molar ratio of (a) to (b) being from 1:0.5 to 1:10; with B. a catalyst-forming component which is an alkyl aluminium halide the molar ratio of (a) in component (A), the component (B), being from 1:1 to 1:5.
Claim 3
Dependent Claim
14 words
Catalysts according to claim 1, wherein the tungsten oxyhalide (a) is WOCl 4 .
Claim 4
Dependent Claim
23 words
Catalysts according to claim 1, wherein the ratio of (a) to (b) used to obtain catalyst-forming component (A) is from 1:0.9 to 1:1.5.
Claim 5
Dependent Claim
24 words
Catalysts according to claim 1, wherein the molar ratio of (a) in catalyst-forming component (A) to catalyst-forming component (B) is from 1:1.8 to 1:2.2.
Claim 6
Dependent Claim
121 words
The process of preparing catalysts for the metathesis of olefins and cycloolefins which consists essentially of reacting a tungsten oxyhalide as such with an organic ligand selected from the group consisting of phthalodinitrile, adipontrile and ethyl phthalate in a molar ratio of the oxyhalide to ligand of 1:0.5 to 1:10, in an inert atmosphere in a reaction medium consisting of a hydrocarbon of chlorinated hydrocarbon solvent, and at a temperature of from -50°C to +50°C, until the tungsten oxyhalide is solubilized, to thereby form a complex, and mixing the oxyhalide ligand complex with an alkyl aluminum halide in an amount such that the molar ratio of tungsten oxyhalide to alkyl aluminum halide is from 1:1 to 1:5, to obtain the catalyst.
Claim 7
Dependent Claim
121 words
The process of preparing catalysts for the metathesis of olefins and cycloolefins which consists essentially of reacting a tungsten oxyhalide as such with an organic ligand selected from the group consisting of phthalodinitrile, adipontrile and ethyl phthalate in a molar ratio of the oxyhalide to ligand of 1:0.5 to 1:10, in an inert atmosphere in a reaction medium consisting of a hydrocarbon of chlorinated hydrocarbon solvent, and at a temperature of from -50°C to +50°C, until the tungsten oxyhalide is solubilized, to thereby form a complex, and mixing the oxyhalide ligand complex with an alkyl aluminum halide in an amount such that the molar ratio of tungsten oxyhalide to alkyl aluminum halide is from 1:1 to 1:5, to obtain the catalyst.
Claim 8
Dependent Claim
20 words
The process of claim 5, in which the catalyst is prepared in the presence of the olefin to be metathesized.
Claim 9
Dependent Claim
12 words
The process according to claim 6, in which the olefin is pentene-2.
Claim 10
Dependent Claim
12 words
The process according to claim 6, in which the olefin is cyclopentene.
Claim 11
Dependent Claim
15 words
The process of claim 5, in which the alkyl aluminum halide is ethyl aluminum dichloride.
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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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |