US3798256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocyanation of olefins
Assignee: EIDP Inc
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Filing: 1971-08-02
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Granted: 1974-03-19
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Expires: 1991-08-02
Abstract
Abstract A PROCESS FOR HYDROCYANATING AN ETHYLENICALLY UNSATURATED ORGANIC COMPOUND IN THE PRESENCE OF A ZERO VALENT NICKEL COMPLEX OF THE FORMULA NI(PXYZ)3R2CN AND NI(PXYZ)2A, WHEREIN X IS OR, Y AND Z ARE R OR OR AND R IS AN ALKYL OR ARYL RADICAL, A GIVEN PXYZ LIGAND HAVING A CONE ANGLE WITH AN AVERAGE VALUE BETWEEN 130* AND 170*; "A" IS AN ETHYLENICALLY UNSATURATED ORGANIC COMPOUND CONTAINING 2 TO 20 CARBON ATOMS; R2 IS AN ALKYL, ALKENYL, CYANO SUBSTITUTED ALKYL, OR ARYL GROUP HAVING 1 TO 20 CARBON ATOMS. A LEWIS ACID SUCH AS ALCL3, ZNCL2 OR (C6H5)3B MAY BE USED IN CONJUNCTION WITH THE COMPLEX.
Inventors
- 👤 C King
- 👤 W Seidel
- 👤 C Tolman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:20
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; B; B01; B01J; B01J31/00; B01J31/16; B01J31/18; B01J31/1805; B01J31/1845; B01J31/185; B01J31/1865; B01J31/1875; B01J31/26; C07C; C07C253/00; C07C253/08; C07C253/10; B01J2231/00; B01J2231/30; B01J2231/32; B01J2231/323; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/847
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |