US3699134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of anthraquinone
Assignee: BASF SE
•
Filing: 1970-06-23
•
Granted: 1972-10-17
•
Expires: 1990-06-23
Abstract
Abstract Production of anthraquinone by catalytic oxidation of indans with oxygen. Anthraquinone obtainable by the process is a starting material for the production of dyes and pesticides.
Inventors
- 👤 Herbert Armbrust
- 👤 Hans Juergen Sturm
- 👤 Heinz Engelbach
- 👤 Hermann Wistuba
- 👤 Armin Stoessel
- 👤 Richard Krabetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:14
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/06; B01J21/063; B01J23/00; B01J23/06; B01J23/16; B01J23/20; B01J23/22; B01J23/70; B01J23/76; B01J23/84; B01J23/847; B01J23/8472; B01J23/85; B01J23/88; B01J27/00; B01J27/02; C; C07; C07C; C07C46/00; C07C46/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
14 words
A process as in claim 1 wherein the catalyst is a vanadium (V) compound.
Claim 2
Dependent Claim
12 words
A process as in claim 1 wherein the catalyst is vanadium pentoxide.
Claim 3
Dependent Claim
15 words
A process as in claim 1 wherein the catalyst is molybdenum oxide and tungsten oxide.
Claim 4
Dependent Claim
28 words
A process as claimed in claim 1 carried out with a ratio of 25 to 400 moles of oxygen per mole of indan (I) beyond the stoichiometric amount.
Claim 5
Dependent Claim
23 words
A process as claimed in claim 1 carried out with 20 to 200 grams of indan (I) per liter of catalyst per hour.
Claim 6
Dependent Claim
25 words
A process as claimed in claim 1 carried out with 20 to 200 grams of indan (I) per liter of catalyst on carrier per hour.
Claim 7
Dependent Claim
23 words
A process as claimed in claim 1 carried out with 40 to 100 grams of indan (I) per liter of catalyst per hour.
Claim 8
Dependent Claim
25 words
A process as claimed in claim 1 carried out with 40 to 100 grams of indan (I) per liter of catalyst on carrier per hour.
Claim 9
Dependent Claim
25 words
A process as claimed in claim 4 carried out with a catalyst containing 0.1 to 1 gram atom of molybdenum per gram atom of tungsten.
Claim 10
Dependent Claim
26 words
A process as claimed in claim 1 carried out with 20 to 100 grams of indan (I) in continuous operation per liter of catalyst per hour.
Claim 11
Dependent Claim
28 words
A process as claimed in claim 1 carried out with 20 to 100 grams of indan (I) per liter of catalyst on carrier per hour in continuous operation.
Claim 12
Dependent Claim
18 words
A process as claimed in claim 1 carried out at a temperature of from 200* to 450* C.
Claim 13
Dependent Claim
18 words
A process as claimed in claim 1 carried out at a temperature of from 250* to 400* C.
Claim 14
Dependent Claim
16 words
A process as in claim 1 carried out at a temperature of at least 160* C.
Claim 15
Dependent Claim
17 words
A process as in claim 1 carried out at a temperature of from 160* to 500* C.
Claim 16
Dependent Claim
17 words
A process as in claim 1 wherein said alkyl radical has from one to four carbon Atoms.
Claim 17
Dependent Claim
12 words
A process as in claim 1 wherein said indan I is 1-methyl-3-phenylindan.
Claim 18
Dependent Claim
12 words
A process as in claim 1 wherein said indan I is 1,3-dimethyl-3-phenylindan.
Claim 19
Dependent Claim
12 words
A process as in claim 1 wherein said indan I is 1,1,3-trimethyl-3-phenylindan.
Claim 20
Dependent Claim
12 words
A process as in claim 1 wherein said indan I is 1-propyl-3-phenylindan.
Claim 21
Dependent Claim
12 words
A process as in claim 1 wherein said indan I is 1-isobutyl-3-phenylindan.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |