US4228035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Irradiated polymer supported metal catalyst
Assignee: California Institute of Technology
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Filing: 1976-05-03
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Granted: 1980-10-14
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Expires: 1996-05-03
Abstract
Abstract Novel polymer supported catalysts are prepared by irradiation of low valent transition metal compounds such as iron carbonyl in the presence of solid polymers containing ligands such as phosphinated polystyrene. Hydrogenation of olefins at ambient conditions has been demonstrated.
Inventors
- 👤 Harry B. Gray
- 👤 Claude C. Frazier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:01
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/34; B01J37/341; B01J37/344; B01J37/345; B01J37/06; C; C07; C07C; C07C5/00; C07C5/02; C07C5/03; C07C5/13; C07C2531/00; C07C2531/16; C07C2531/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
77 words
A method of preparing an olefin addition catalyst comprising the steps of: forming a solution of a low valent transition metal coordination compound in organic solvent; irradiating the solution with ultraviolet radiation to form photochemically generated transition metal species; combining an insoluble organic polymeric support having ligands for said metal with said species; and attaching said photochemically generated species to said ligands in an amount of at least 0.1% by weight of metal on said polymeric support.
Claim 2
Independent Claim
77 words
A method of preparing an olefin addition catalyst comprising the steps of: forming a solution of a low valent transition metal coordination compound in organic solvent; irradiating the solution with ultraviolet radiation to form photochemically generated transition metal species; combining an insoluble organic polymeric support having ligands for said metal with said species; and attaching said photochemically generated species to said ligands in an amount of at least 0.1% by weight of metal on said polymeric support.
Claim 3
Dependent Claim
19 words
A method according to claim 1 in which the wavelength of the radiation is from 300 to 500 nm.
Claim 4
Dependent Claim
21 words
A method according to claim 1 in which the metal content of the catalyst is from 2 to 20% by weight.
Claim 5
Dependent Claim
21 words
A method according to claim 1 in which the solution is irradiated to form the species before addition of the support.
Claim 6
Dependent Claim
23 words
A method according to claim 1 in which irradiation is discontinued before a plurality of polymeric ligands attach to a single metal atom.
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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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |