Patent US3555098A successfully refreshed from Google Patents.
US3555098A
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US
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Hydroformylation
Assignee: Union Oil Company of California
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Filing: 1967-12-13
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Granted: 1971-01-12
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Expires: 1987-12-13
Abstract
Abstract CATALYTIC ACTIVITY IS MAINTAINED IN A HYDROFORMYLATION REACTION BY THE TREATMENT OF ALL OR A PORTION OF THE RECYCLED REACTION MEDIUM CONTAINING THE CATALYST WITH AN AQUEOUS SOLUTION, PREFERABLY WITH AN ALKALINE AQUEOUS SOLUTION. THE TREATMENT IS EFFECTIVE AT MILD CONDITIONS AND RESULTS IN THE EXTRACTION OF THE BYPRODUCT ACID FORMED IN THE HYDROFORMYLATION WHICH UNLESS REMOVED DEACTIVATES THE CATALYST. THE INVENTION IS APPLICABLE TO THE HYDROFORMYLATION REACTIONS PERFORMED IN LIQUID PHASE USING A COMPLEX OF A BIPHYLIC LIGAND AND A GROUP VIII NOBLE METAL CATALYST, PREFERABLY A RHODIUM COMPLEX WITH A TRIARYL PHOSPHINE.
Inventors
- 👤 Kenneth L Olivier
- 👤 Frank B Booth
- 👤 David E Mears
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:03
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/49; C07C45/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |