Patent US3894069A successfully refreshed from Google Patents.
US3894069A
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Process for preparing dithiodicarbonyl metal complexes
Assignee: ChampionX LLC
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Filing: 1973-08-03
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Granted: 1975-07-08
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Expires: 1993-08-03
Abstract
Abstract Dithiodicarbonyl metal complexes are prepared in increased yields by a two-step process in which an acyloin is reacted with a phosphorus sulfide in the presence of ammonium ion in a solvent in the first step and the reaction solution preferably after filtration to remove solid residues is reacted in a second step with an aqueous solution of a water soluble ionizable compound of a heavy metal such as iron, cobalt or nickel. The resultant dithiodicarbonyl metal complex is recovered as the product obtained in the second step.
Inventors
- 👤 Donald G Ries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:25
CPC Classifications
C; C07; C07C; C07C325/00; C07C325/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
137 words
A PROCESS FOR PREPARING A DITHIODICARBONYL METAL COMPLEX WHICH COMPRISES: A. REACTING AN ACYLOIN WITH A PHOSPHORUS SULFIDE IN THE PRESENCE OF AMMONIUM ION IN A SOLVENT AND B. REACTING THE REACTION SOLUTION FROM (A) WITH AN AQUEOUS SOLUTION OF A REACTIVE WATER IONIZABLE COMPOUND OF A HEAVY METAL TO FORM A DITHIODICARBONYL METAL COMPLEX, THE QUANTITY OF SAID AMMONIUM ION CORRESPONDING TO 0.1 TO 2.0 (NH4)+ EQUIVALENTS PER MOLE OF SAID ACYLOIN, AND SAID ACYLION BEING SELECTED FROM THE GROUP CONSISTING OF BENZOIN AND SUBSTITUTED BENZOINS IN WHICH THE SUBSTITUENTS ARE FROM THE GROUP CONSISTING OF METHYL, CHLORO- AND METHOXY, SAID AMMONIUM ION BEING DERIVED FROM SUBSTANCES FROM THE GROUP CONSISTING OF AMMONIA, AND WATER SOLUBLE AMMONIUM, AMINE AND QUATERNARY SALTS, AND SAID HEAVY METAL BEING SELECTED FROM THE GROUP CONSISTING OF IRON, COBALT AND NICKEL.
Claim 2
Dependent Claim
137 words
A PROCESS FOR PREPARING A DITHIODICARBONYL METAL COMPLEX WHICH COMPRISES: A. REACTING AN ACYLOIN WITH A PHOSPHORUS SULFIDE IN THE PRESENCE OF AMMONIUM ION IN A SOLVENT AND B. REACTING THE REACTION SOLUTION FROM (A) WITH AN AQUEOUS SOLUTION OF A REACTIVE WATER IONIZABLE COMPOUND OF A HEAVY METAL TO FORM A DITHIODICARBONYL METAL COMPLEX, THE QUANTITY OF SAID AMMONIUM ION CORRESPONDING TO 0.1 TO 2.0 (NH4)+ EQUIVALENTS PER MOLE OF SAID ACYLOIN, AND SAID ACYLION BEING SELECTED FROM THE GROUP CONSISTING OF BENZOIN AND SUBSTITUTED BENZOINS IN WHICH THE SUBSTITUENTS ARE FROM THE GROUP CONSISTING OF METHYL, CHLORO- AND METHOXY, SAID AMMONIUM ION BEING DERIVED FROM SUBSTANCES FROM THE GROUP CONSISTING OF AMMONIA, AND WATER SOLUBLE AMMONIUM, AMINE AND QUATERNARY SALTS, AND SAID HEAVY METAL BEING SELECTED FROM THE GROUP CONSISTING OF IRON, COBALT AND NICKEL.
Claim 3
Dependent Claim
13 words
A process as claimed in claim 1 in which said acyloin is benzoin.
Claim 4
Dependent Claim
13 words
A process as claimed in claim 1 in which saiD solvent is dioxane.
Claim 5
Dependent Claim
23 words
A process as claimed in claim 1 in which said ammonium ion is 0.8 to 1.0 (NH4) equivalents per mole of said acyloin.
Claim 6
Dependent Claim
17 words
A process as claimed in claim 1 in which said ammonium ion is added as ammonium sulfate.
Claim 7
Dependent Claim
14 words
A process as claimed in claim 1 in which said phosphorus sulfide is P2S5.
Claim 8
Dependent Claim
25 words
A process as claimed in claim 1 in which said phosphorus sulfide is P2S5 and the molar ratio of P2S5 to acyloin is approximately 2:1.
Claim 9
Dependent Claim
19 words
A process as claimed in claim 1 in which said heavy metal is nickel and the acyloin is benzoin.
Claim 10
Dependent Claim
26 words
A process as claimed in claim 1 in which the reaction solution from step (a) is filtered and the solid residue removed prior to step (b).
References Cited (Backward Citations)
US3588216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |