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US3725534A
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Method of forming complex cobalt carbonyl compounds
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1969-03-10
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Granted: 1973-04-03
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Expires: 1989-03-10
Abstract
Abstract Complex cobalt carbonyl compounds containing a cobalt tetracarbonyl (Co(CO)4 ) anion are formed in the aqueous phase through the reaction of a cobalt material with carbon monoxide in the presence of hydrogen, a noble metal catalyst and a promoter. Useful promoters include alkali and alkaline earth metal compounds, in particular alkali and alkaline earth salts of weak acids, ammonium compounds, amine compounds and quaternary ammonium compounds. The complex cobalt carbonyl compounds thus formed can be converted to useful oxonation catalysts by contacting the same with a mineral acid.
Inventors
- 👤 J Reisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:02
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/75; C; C01; C01G; C01G1/00; C01G1/04; C01G51/00; C01G51/02; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/845
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
28 words
The process of claim 1 wherein said reaction is conducted at a temperature varying from 120* to 350*F. and at a pressure ranging from 200 to 4,500 psig.
Claim 2
Dependent Claim
29 words
The process of claim 1 wherein said noble metal catalyst is a metal selected from the group consisting of metals of Groups IB and VIII of the Periodic Table.
Claim 3
Dependent Claim
100 words
The process of claim 1 wherein the molar ratio of promoter compound to cobalt material within the reaction zone is maintained at a level of at least about 1:1 when said cobalt material is a salt of an acid having a dissociation constant less than about 1 X 10 2 and a molar ratio of promoter compound to cobalt material within the reaction zone is maintained at a level at least about 3:1 and the cobalt material is present in the reaction zone as a salt of an acid having a dissociation constant greater than about 1 X 10 2.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein said complex cobalt carbonyl compound is sodium cobalt carbonyl.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein said complex cobalt carbonyl compound is ammonium cobalt carbonyl.
Claim 6
Independent Claim
186 words
A method for forming complex cobalt carbonyl compounds containing a cobalt tetracarbonyl anion having the formula (Co(CO)4 ) and a cation selected from the group consisting of sodium, potassium, rubidium, mercurous and ammonium ions which comprises contacting within a reaction zone, in a water reaction medium, a cobalt material selected from the group consisting of water soluble salts of acids having a dissociation constant less than about 1 X 10 2 with carbon monoxide in the presence of hydrogen, a promoter compound, said promoter compound being selected from the group consisting of alkali metal salts, mercurous salts ammonium salts, and quaternary ammonium salts, the anion of said salts being an anion of an acid having a dissociation constant less than about 1 X 10 2, and in the presence of a noble metal catalyst selected from the group consisting of metals of Groups IB and VIII of the Periodic Table, at a temperature ranging from 150* to 250*F. and at a pressure varying from 500 to 3,000 psig, the molar ratio of promoter compound to cobalt material within said reaction zone being at least about 1:1.
Claim 7
Dependent Claim
56 words
The process of claim 7 wherein the molar ratio of promoter compound to cobalt material within the reaction zone is maintained at a level at least about 1:1 when3:1 when the cobalt material is present in the reaction zone as a salt of an acid having a dissociation constant greater than about 1 X 10 2.
Claim 8
Dependent Claim
17 words
The process of claim 8 wherein said noble metal catalyst is palladium contained on a carbon support.
Claim 9
Dependent Claim
13 words
The process of claim 9 wherein said promoter compound is a sodium compound.
Claim 10
Dependent Claim
13 words
The process of claim 9 wherein said promoter compound is an ammonium compound.
Claim 11
Dependent Claim
20 words
The process of claim 7 wherein said water reaction medium is composed of at least about 90 volume percent water.
References Cited (Backward Citations)
US2865716A
Cited
US2992275A
Cited
US2858194A
Cited
US3188351A
Cited
GB1030963A
Cited
US3507615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |