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US4411746A
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Preparation of alkyl-substituted benzaldehydes
Assignee: BASF SE
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Filing: 1982-07-22
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Granted: 1983-10-25
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Expires: 2002-07-22
Abstract
Abstract A process for the preparation of alkyl-substituted benzaldehydes by electrooxidation of alkylbenzenes using graphite anodes coated with metal oxides or with carbides.
Inventors
- 👤 Dieter Degner
- 👤 Hans Roos
- 👤 Heinz Hannebaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:21
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/20; C25B3/23; C25B3/01; C25B3/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
In a process for preparing an alkyl-substituted benzaldehyde of the formula ##STR4## wherein R 1 is hydrogen, alkyl or aryl by electrooxidation of an alkylbenzene derivative of the formula ##STR5## wherein R 1 is as defined above, X is hydrogen, hydroxy or R 2 COO - , and R 2 is hydrogen or alkyl, in water or an alkanoic acid, the improvement which comprises: conducting the electrooxidation using graphite anodes coated with a metal oxide or carbide selected from the group consisting of ruthenium oxide, titanium dioxide, iron oxide, chromium oxide, cobalt oxide, manganese dioxide, nickel oxide or tungsten carbide.
Claim 2
Dependent Claim
100 words
In a process for preparing an alkyl-substituted benzaldehyde of the formula ##STR4## wherein R 1 is hydrogen, alkyl or aryl by electrooxidation of an alkylbenzene derivative of the formula ##STR5## wherein R 1 is as defined above, X is hydrogen, hydroxy or R 2 COO - , and R 2 is hydrogen or alkyl, in water or an alkanoic acid, the improvement which comprises: conducting the electrooxidation using graphite anodes coated with a metal oxide or carbide selected from the group consisting of ruthenium oxide, titanium dioxide, iron oxide, chromium oxide, cobalt oxide, manganese dioxide, nickel oxide or tungsten carbide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |