Patent US4419525A successfully refreshed from Google Patents.
US4419525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery and rejuvenation of Wacker-type catalysts
Assignee: Phillips Petroleum Co
•
Filing: 1982-03-11
•
Granted: 1983-12-06
•
Expires: 2002-03-11
Abstract
Abstract Wacker-type oxidation catalysts can be recovered and rejuvenated for further use by separating catalyst solids from the reaction mixture and, optionally, adjusting pH.
Inventors
- 👤 Tod K. Shioyama
- 👤 Jim J. Straw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:12
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/26; B01J31/36; B01J23/00; B01J23/90; B01J23/96; B01J31/02; B01J31/0234; B01J31/0235; B01J31/0239; B01J31/16; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2226; B01J31/223; B01J31/2234; B01J31/2252; B01J31/2282; B01J31/2291; B01J31/24; B01J31/2404; B01J31/34; B01J31/40; B01J31/4015; B01J31/4023; B01J31/4038; C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; B01J21/00; B01J21/02; B01J2231/00; B01J2231/70; B01J23/38; B01J23/40; B01J23/44; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/824; B01J2531/90; B01J2531/96; B01J27/00; B01J27/02; B01J27/053; B01J27/06; B01J27/08; B01J27/24; B01J27/25; B01J31/04; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
123 words
A process for the recovery and rejuvenation for reuse of a catalyst useful for the oxidation of olefins to ketones which catalyst contains a palladium component, a heteropolyacid component, and a surfactant component following its use to catalyze the oxidation of an olefin to a ketone in a reaction zone to produce a reaction mixture which contains an organic phase and an aqueous phase, which process includes the essential steps of: (1) removing the organic phase from the reaction mixture to leave the aqueous phase, (2) removing water from the aqueous phase until substantially dry catalyst solids remain, (3) adding water to the product of step (2) to yield a solution, and (4) recycling the solution of step (3) to the reaction zone.
Claim 2
Dependent Claim
123 words
A process for the recovery and rejuvenation for reuse of a catalyst useful for the oxidation of olefins to ketones which catalyst contains a palladium component, a heteropolyacid component, and a surfactant component following its use to catalyze the oxidation of an olefin to a ketone in a reaction zone to produce a reaction mixture which contains an organic phase and an aqueous phase, which process includes the essential steps of: (1) removing the organic phase from the reaction mixture to leave the aqueous phase, (2) removing water from the aqueous phase until substantially dry catalyst solids remain, (3) adding water to the product of step (2) to yield a solution, and (4) recycling the solution of step (3) to the reaction zone.
Claim 3
Dependent Claim
36 words
The process of claim 1 which includes the step of (5) adjusting the pH of the solution from step (4) to a pH of about 0.5 to 3.0 before it is recycled to the reaction zone.
Claim 4
Dependent Claim
21 words
The process of any one of claims 1 or 2 wherein the catalyst also contains one or more boric acid components.
Claim 5
Dependent Claim
120 words
A process for the oxidation of olefins to ketones which process comprises the step of contacting an olefin with a catalyst which contains a palladium component, a heteropolyacid component, and a surfactant component, wherein the catalyst has been recovered following its use to produce a reaction mixture which contains an organic phase and an aqueous phase and has been rejuvenated by a process which includes the essential steps (1) removing the organic phase from the reaction mixture to leave an aqueous phase, (2) recovering water from the aqueous phase until substantially dry catalyst solids remain, (3) adding water to the product of step (2) to yield a solution, and (4) recycling the solution of step (3) to the reaction zone.
Claim 6
Dependent Claim
120 words
A process for the oxidation of olefins to ketones which process comprises the step of contacting an olefin with a catalyst which contains a palladium component, a heteropolyacid component, and a surfactant component, wherein the catalyst has been recovered following its use to produce a reaction mixture which contains an organic phase and an aqueous phase and has been rejuvenated by a process which includes the essential steps (1) removing the organic phase from the reaction mixture to leave an aqueous phase, (2) recovering water from the aqueous phase until substantially dry catalyst solids remain, (3) adding water to the product of step (2) to yield a solution, and (4) recycling the solution of step (3) to the reaction zone.
Claim 7
Dependent Claim
16 words
The process of claim 4 wherein the catalyst also contains one or more boric acid components.
References Cited (Backward Citations)
US3392200A
Cited
US3485877A
Cited
US3607948A
Cited
GB1508331A
Cited
US4203927A
Cited
US4220604A
Cited
US4271320A
Cited
US4237071A
Cited
US4237331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |