Patent US3797240A successfully refreshed from Google Patents.
US4082811A
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Recovery of metal and triarylborane catalyst components from olefin hydrocyanation residue
Assignee: EIDP Inc
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Filing: 1977-02-23
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Granted: 1978-04-04
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Expires: 1997-02-23
Abstract
Abstract Process for the recovery of catalyst components from a catalyst residue, e.g., a residue obtained from the hydrocyanation of olefins, e.g., butadiene, using a zero-valent nickel complex promoted with a triarylborane as a catalyst by contacting the residue with an essentially aqueous solution of nitrogen-containing base, e.g., ammonium hydroxide to form and precipitate the amine adduct of the triarylborane, while maintaining other catalyst components in solution and thereafter separating the precipitate from the resultant solution. Nickel can be separated from the resultant solution by reducing the concentration of amine in the solution to thereby precipitate a nickel cyanide complex, e.g., nickel (II) cyanidemonoammine.
Inventors
- 👤 Howard Everett Shook, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:28
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/04; B; B01; B01J; B01J31/00; B01J31/40; B01J31/4015; B01J31/4023; B01J31/4038; C07F5/00; C07F5/02; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
A process for the recovery of catalyst components from a catalyst residue which residue is obtained from the hydrocyanation of olefins using a catalyst comprising zero-valent nickel complex promoted with a triarylborane and comprises nickel cyanide, triarylborane and complexes of the foregoing, said process comprising contacting said residue with an aqueous solution containing at least 10 moles of nitrogen-containing base per mole of boron plus nickel while maintaining the concentration of said base at at least 6% to maintain the nickel in solution and to form and precipitate the basic adduct of said triarylborane and thereafter separating the precipitate from the resultant solution.
Claim 2
Dependent Claim
103 words
A process for the recovery of catalyst components from a catalyst residue which residue is obtained from the hydrocyanation of olefins using a catalyst comprising zero-valent nickel complex promoted with a triarylborane and comprises nickel cyanide, triarylborane and complexes of the foregoing, said process comprising contacting said residue with an aqueous solution containing at least 10 moles of nitrogen-containing base per mole of boron plus nickel while maintaining the concentration of said base at at least 6% to maintain the nickel in solution and to form and precipitate the basic adduct of said triarylborane and thereafter separating the precipitate from the resultant solution.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein the base is ammonia and the moles of ammonia per mole of boron plus nickel are maintained in the range 15-50.
Claim 4
Dependent Claim
17 words
The process of claim 2 wherein the concentration of said ammonia is maintained in the range 15-25%.
Claim 5
Dependent Claim
22 words
The process of claim 3 wherein the temperature is maintained in the range 90°-110° C for a period at least 30 minutes.
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) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |