US3673281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic hydrogenation of polymers containing double bonds
Assignee: BASF SE
•
Filing: 1971-01-29
•
Granted: 1972-06-27
•
Expires: 1991-01-29
Abstract
Abstract A process for the catalytic hydrogenation of polymers containing double bonds by the action of hydrogen on a solution of the polymer in an inert organic solvent in the presence of a catalyst complex comprising: A. a compound of iron, cobalt or nickel, B. an organo-aluminum compound, and C. a hexa-alkylphosphoric acid triamide of the general formula OP(NR2)3 in which R stands for alkyl of from one to four carbon atoms, the catalyst components A and B being used in a molar ratio of from 1 : 40 to 1 : 1 and the components A and C in a molar ratio of from 1 : 0.5 to 1 : 100.
Inventors
- 👤 Klaus Bronstert
- 👤 Volker Ladenberger
- 👤 Gerhard Fahrbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:54
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
A process as claimed in claim 1 wherein a further quantity of hexa-alkylphosphoric acid triamide is added to the polymer solution after completion of hydrogenation, whereupon the catalyst complex is destroyed by the addition of optionally acidified water and the catalyst residues are removed together with the aqueous phase.
References Cited (Backward Citations)
US3541064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |