US4113756A
Expired / Lapsed
US
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Conversion of mono-valent thallium to tri-valent thallium
Assignee: Halcon Research and Development Corp
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Filing: 1976-11-08
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Granted: 1978-09-12
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Expires: 1996-11-08
Abstract
Abstract A mono-valent thallium compound is converted to a trivalent thallium compound by treating the thallium (I) compound with molecular oxygen in the presence of a Group VIII noble metal catalyst and in the presence of a promoter comprising an alkali metal compound to oxidize the thallium (I) compound to a thallium (III) compound.
Inventors
- 👤 Richard A. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:30
CPC Classifications
C; C01; C01G; C01G15/00; C07; C07F; C07F5/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
53 words
In a process for converting a thallium (I) compound to a thallium (III) compound in which the thallium (I) compound is reacted with molecular oxygen in the presence of a Group VIII noble metal, the improvement which comprises effecting said reaction in the presence of a promoter comprising a Group IA metal compound.
Claim 2
Dependent Claim
53 words
In a process for converting a thallium (I) compound to a thallium (III) compound in which the thallium (I) compound is reacted with molecular oxygen in the presence of a Group VIII noble metal, the improvement which comprises effecting said reaction in the presence of a promoter comprising a Group IA metal compound.
Claim 3
Dependent Claim
29 words
A process as defined in claim 1 wherein the promoter is employed in an amount of from 0.01 to 50 moles of promoter per mole of thallium (I) compound.
Claim 4
Dependent Claim
29 words
A process as defined in claim 1 wherein the promoter is employed in an amount of from 0.1 to 10 moles of promoter per mole of thallium (I) compound.
Claim 5
Dependent Claim
30 words
A process as defined in claim 1 wherein the thallium (I) compound comprises a salt derived from an alkyl, cycloalkyl or aryl carboxylic acid having up to twenty carbon atoms.
Claim 6
Dependent Claim
19 words
A process as defined in claim 4 wherein said reaction is effected in the presence of a carboxylic acid.
Claim 7
Dependent Claim
17 words
A process as defined in claim 1, wherein the metal has an atomic weight greater than 10.
Claim 8
Dependent Claim
16 words
A process as defined in claim 1, wherein the metal is sodium, potassium, cesium or rubidium.
Claim 9
Dependent Claim
17 words
A process as defined in claim 1, wherein the reaction is carried out in a liquid medium.
Claim 10
Dependent Claim
17 words
A process as defined in claim 1, wherein the Group VIII noble metal is platinum or palladium.
Claim 11
Dependent Claim
23 words
A process as defined in claim 1, wherein the reaction is carried out under an oxygen partial pressure of 20 to 10,000 psi.
Claim 12
Dependent Claim
17 words
A process as defined in claim 1, wherein the thallium (I) compound is a thallium (I) carboxylate.
References Cited (Backward Citations)
US3399956A
Cited
US3436409A
Cited
US3479262A
Cited
US3594395A
Cited
JPS4913104A
Cited
JPS5144116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |