US4759834A
Expired / Lapsed
US
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Process for the electrochemical oxidation of organic products
Assignee: DSM BV
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Filing: 1987-07-13
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Granted: 1988-07-26
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Expires: 2007-07-13
Abstract
Abstract The invention relates to a process for the electrochemical oxidation of organic products at a lead-silver anode in acid medium, in which process the organic products used are alkyl-substituted heterocycles and in which process a lead-silver anode with 2-10% (wt) silver is used.
Inventors
- 👤 Andreas M. J. Thomas
- 👤 Franciscus van den Brink
- 👤 Rudolf van Hardeveld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:31
CPC Classifications
C; C22; C22C; C22C11/00; C25; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/046; C25B3/00; C25B3/01; C25B3/05; C25B3/07; C25B3/09; C25B3/20; C25B3/23
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
36 words
Process for the electrochemical oxidation of organic products at a lead-silver anode in acid medium, characterized in that the organic products used are alkyl-substituted heterocycles and that a lead-silver anode is used with 2-10% (wt) silver.
Claim 2
Dependent Claim
36 words
Process for the electrochemical oxidation of organic products at a lead-silver anode in acid medium, characterized in that the organic products used are alkyl-substituted heterocycles and that a lead-silver anode is used with 2-10% (wt) silver.
Claim 3
Dependent Claim
14 words
Process according to claim 1, characterized in that the anode contains 2.6-8% (wt) silver.
Claim 4
Dependent Claim
33 words
Process according to claim 1, characterized in that the anode also contains one or more of the metals antimony, cadmium, calcium, cobalt, tellurium, thorium, tin or zinc in an amount of 0.01-0.7% (wt).
Claim 5
Dependent Claim
17 words
Process according to claim 1, characterized in that the acid used is sulphuric acid or phosphoric acid.
Claim 6
Dependent Claim
17 words
Process according to claim 1, characterized in that a current density of 100-10,000 A/m 2 is applied.
Claim 7
Dependent Claim
17 words
Process according to claim 1, characterized in that the alkyl-substituted heterocycles used are mono and dimethylsubstituted pyridines.
Claim 8
Dependent Claim
14 words
Process according to claim 6, characterized in that the organic product used is 2,3-lutidine.
Claim 9
Dependent Claim
20 words
Process according to claim 1, characterized in that the electrochemical oxidation is carried out at a temperature between 20°-90° C.
References Cited (Backward Citations)
US4380493A
Cited
US4411746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |