Patent US3734576A successfully refreshed from Google Patents.
Patent US3873580A successfully refreshed from Google Patents.
US3873580A
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Oxidation Process
Assignee: Imperial Chemical Industries Ltd
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Filing: 1973-01-08
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Granted: 1975-03-25
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Expires: 1993-01-08
Abstract
Abstract Process for the liquid phase oxidation of organic compounds, particularly the oxidation of an aromatic nucleus to the corresponding quinone, using an aqueous solution of a persulphate compound as oxidising agent in the presence, as catalyst, of cerium, chromium or vanadium, and preferably in the presence, as co-catalyst, of silver or iron. The catalyst and co-catalyst are preferably water-soluble salts. Preferably, the organic compound is substantially waterinsoluble, and is in solution in a non-reactive, substantially water-immiscible solvent.
Inventors
- 👤 Robert Allan Campbell Rennie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:16
CPC Classifications
C; C07; C07C; C07C46/00; C07C46/02; C07C46/04; C07C201/00; C07C201/06; C07C201/12; C07C205/00; C07C205/45; C07C205/46; C07C45/00; C07C45/27; C07C45/28; B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; B01J23/24; B01J23/26; B01J23/38; B01J23/54; B01J23/66; C07C2603/00; C07C2603/02; C07C2603/40; C07C2603/42; C07C2603/48; C07C2603/50
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
47 words
A PROCESS FOR THE LIQUID PHASE OXIDATION OF AN AROMATIC ORGANIC COMPOUND TO THE CORRESPONDING QUINONE WHICH COMPRISES CONTACTING THE SAID ORGANIC COMPOUND WITH AN AQUEOUS SOLUTION OF A PERSULPHATE COMPOUND IN THE PRESENCE OF A CATALYTIC QUANTITY OF CERIUM CHROMIUM OR VANADIUM OR A MIXTURE THEREOF.
Claim 2
Dependent Claim
47 words
A PROCESS FOR THE LIQUID PHASE OXIDATION OF AN AROMATIC ORGANIC COMPOUND TO THE CORRESPONDING QUINONE WHICH COMPRISES CONTACTING THE SAID ORGANIC COMPOUND WITH AN AQUEOUS SOLUTION OF A PERSULPHATE COMPOUND IN THE PRESENCE OF A CATALYTIC QUANTITY OF CERIUM CHROMIUM OR VANADIUM OR A MIXTURE THEREOF.
Claim 3
Dependent Claim
17 words
The process of claim 1 when performed in the presence of a co-catalyst containing silver or iron.
Claim 4
Dependent Claim
16 words
The process of claim 2 in which the catalyst and co-catalyst, respectively, are water-soluble metal salts.
Claim 5
Dependent Claim
20 words
The process of claim 3 in which the catalyst is a cerium salt and the co-catalyst is a silver salt.
Claim 6
Dependent Claim
22 words
The process of claim 3 in which the concentration of catalyst is in the range 0.01 through 1.0 mole/mole of organic compound.
Claim 7
Dependent Claim
21 words
The process of claim 5 in which the concentration of co-catalyst is in the range 0.01 through 1 mole/mole of catalyst.
Claim 8
Dependent Claim
19 words
The process of claim 2 in which at least one of the catalyst and co-catalyst is a water-insoluble solid.
Claim 9
Dependent Claim
19 words
The process of claim 7 in which the water-insoluble solid is a metal compound on a solid, inert support.
Claim 10
Dependent Claim
19 words
The process of claim 2 in which the organic compound is in solution in a non-reactive, substantially water-immiscible solvent.
Claim 11
Dependent Claim
23 words
The process of claim 2 in which the pH of the aqueous solution of persulphate compound is in the range 2 to 7.
Claim 12
Dependent Claim
14 words
The process of claim 2 when performed at a temperature from ambient upto 80*C.
Claim 13
Dependent Claim
30 words
The process of claim 2 in which the aromatic compound is a fused ring polynuclear aromatic hydrocarbon, a diphenyl compound, a phenol or a substituted derivative of the above compounds.
Claim 14
Dependent Claim
20 words
The process of claim 4 in which the organic compound is naphthalene, diphenyl, anthracene, pyrene, chrysene, 1-nitronaphthalene, or anthracene-2-sulphonic acid.
Claim 15
Dependent Claim
25 words
The process of claim 2 in which spent persulphate is regenerated by electrolytic oxidation in a vessel separate from that employed for the oxidation reaction.
References Cited (Backward Citations)
US3745180A
Cited
US3806469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |