US3818068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of deactivated catalyst species from a hydrocyanation product fluid
Assignee: EIDP Inc
•
Filing: 1973-01-19
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Granted: 1974-06-18
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Expires: 1993-01-19
Abstract
Abstract A process for removing deactivated nickel catalyst species from a hydrocyanation product fluid by heating the product fluid containing the species dissolved therein at a temperature in the range of 90*-175* C. to render the species insoluble in the product fluid and removing the precipitated species from the product fluid.
Inventors
- 👤 J Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:55
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/18; B01J31/1845; B01J31/185; B01J31/26; C; C07; C07C; C07C253/00; C07C253/08; C07C253/10; B01J2231/00; B01J2231/30; B01J2231/32; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/847; B01J31/40; B01J31/4015; B01J31/4023; B01J31/403; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
31 words
The process of claim 1 wherein the catalyst promoter is a compound containing a cation of a metal of the group consisting of zinc, cadmium, aluminum, titanium, chromium, tin and vanadium.
Claim 2
Dependent Claim
131 words
The process of claim 2 wherein the product fluid is contacted in an extractor at a temperature in the range of about 0* C. to about 100* C. with a hydrocarbon solvent of the group consisting of paraffin and cycloparaffin hydrocarbons and mixtures thereof having a boiling point in the range of about 30* C. to about 135* C. to form a multiphase mixture wherein the hydrocarbon solvent phase contains predominantly the organic phosphorus compounds and their zero-valent nickel complexes, separating the hydrocarbon solvent phase from the multiphase mixture and thereafter heating the remaining product fluid at a temperature in the range of 90* - 175* C. to render the deactivated nickel catalyst species contained therein insoluble in the product fluid and separating the insolubilized nickel species from the product fluid.
Claim 3
Dependent Claim
32 words
The process of claim 3 wherein the product fluid is heated under atmospheric pressure at a temperature in the range of 90* -150* C. to render insoluble the deactivated nickel catalyst species.
Claim 4
Dependent Claim
18 words
The process of claim 4 wherein the temperature is maintained in the range of 100* - 125* C.
Claim 5
Dependent Claim
13 words
The process of claim 5 wherein PZ3 is a mixture of tri-(meta-and para-tolyl)phosphites.
References Cited (Backward Citations)
US3676475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |