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US4363765A
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Rhodium recovery process
Assignee: Union Carbide Corp
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Filing: 1981-04-03
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Granted: 1982-12-14
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Expires: 2001-04-03
Abstract
Abstract A particular process is provided for the recovery of rhodium values from liquid compositions. The process comprises contacting a solubilized rhodium complex with water, a crown ether and an alkaline cesium salt in the liquid phase such that a solid comprising rhodium is formed. The process is applied with particular advantage to the recovery of solubilized rhodium values derived from processes for the production of polyhydric alcohols such as ethylene glycol, and monohydric alcohols such as methanol, by the reaction of carbon monoxide and hydrogen in the presence of rhodium carbonyl complex catalysts in a homogeneous liquid medium. The invention also concerns cesium/crown ether salts of anionic rhodium complexes.
Inventors
- 👤 Rocco A. Fiato
- 👤 Jose' L. Vidal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:13
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/40; B01J31/4015; B01J31/4023; B01J31/4038; B01J31/4046; B01J31/16; B01J31/20; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2226; B01J31/223; B01J31/2234; C; C01; C01G; C01G55/00; C01G55/007; C07; C07C; C07C45/00; C07C45/49; C07C45/50; C07F; C07F15/00; C07F15/0006; C07F15/0073; C07F15/008; B01J2231/00; B01J2231/60; B01J2231/64; B01J2231/641; B01J2231/648; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/822; B01J27/00; B01J27/02; B01J27/04; B01J27/043; B01J27/045; B01J31/02; B01J31/0201; B01J31/04; B01J31/1608; B01J31/18; B01J31/24; B01J31/26; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
35 words
The process for the recovery of rhodium values which comprises contacting a rhodium complex with a crown ether, an alkaline cesium salt and water in a liquid phase such that a rhodium-containing solid is formed.
Claim 2
Dependent Claim
35 words
The process for the recovery of rhodium values which comprises contacting a rhodium complex with a crown ether, an alkaline cesium salt and water in a liquid phase such that a rhodium-containing solid is formed.
Claim 3
Dependent Claim
37 words
The process of claim 1 in which the rhodium complex comprises rhodium in complex combination with carbon monoxide, or an organic-substituted ligand comprising at least one element of Groups IV, V and VI, or any combination thereof.
Claim 4
Dependent Claim
25 words
The process of claim 1 in which the rhodium complex contains as an additional ligand at least one of hydrogen, halogen, sulfur, phosphorus and carbon.
Claim 5
Dependent Claim
15 words
The process of claim 1 in which carbon monoxide is provided to said liquid phase.
Claim 6
Dependent Claim
12 words
The process of claim 1 in which the cesium salt is inorganic.
Claim 7
Dependent Claim
14 words
The process of claim 1 in which the cesium salt is a cesium carboxylate.
Claim 8
Dependent Claim
15 words
The process of claim 1 in which the liquid phase additionally contains a potassium salt.
Claim 9
Dependent Claim
12 words
The process of claim 1 in which the crown ether is 18-crown-6.
Claim 10
Dependent Claim
12 words
The process of claim 1 in which the crown ether is 15-crown-5.
Claim 11
Dependent Claim
12 words
The process of claim 1 in which the crown ether is 12-crown-4.
Claim 12
Dependent Claim
39 words
The process of claim 1 in which the rhodium values are derived from a process wherein polyhydric and monohydric alcohols are produced by the reaction of carbon monoxide and hydrogen in the presence of a rhodium carbonyl complex catalyst.
Claim 13
Dependent Claim
40 words
The process of claim 1 in which the rhodium values are derived from a hydroformylation process for producing aldehydes by the reaction of an olefin, carbon monoxide and hydrogen in the presence of a rhodium catalyst containing a phosphine ligand.
Claim 14
Dependent Claim
62 words
The process for the recovery of rhodium values which comprises introducing a liquid composition containing a solubilized rhodium carbonyl complex to an aqueous liquid phase reaction mixture and contacting said rhodium carbonyl complex in said aqueous liquid phase with an alkaline cesium salt and a crown ether such that a solid comprising a salt of an anionic rhodium carbonyl complex is formed.
Claim 15
Dependent Claim
62 words
The process for the recovery of rhodium values which comprises introducing a liquid composition containing a solubilized rhodium carbonyl complex to an aqueous liquid phase reaction mixture and contacting said rhodium carbonyl complex in said aqueous liquid phase with an alkaline cesium salt and a crown ether such that a solid comprising a salt of an anionic rhodium carbonyl complex is formed.
Claim 16
Dependent Claim
73 words
The process of claim 13 in which said liquid composition containing the solubilized rhodium carbonyl complex is derived from a process for the production of polyhydric alcohols by the reaction of carbon monoxide and hydrogen in the presence of a rhodium carbonyl complex in a homogeneous liquid phase at a temperature between about 100° C. and about 375° C. and a pressure between about 500 and about 50,000 pounds per square inch absolute.
Claim 17
Dependent Claim
12 words
The process of claim 13 in which the crown ether is 18-crown-6.
Claim 18
Dependent Claim
14 words
The process of claim 13 in which the cesium salt is a cesium carboxylate.
Claim 19
Dependent Claim
21 words
The process of claim 13 in which said anionic rhodium carbonyl complex is in association with a cesium/crown ether complex cation.
Claim 20
Dependent Claim
8 words
Cesium/crown ether salts of anionic rhodium carbonyl complexes.
Claim 21
Dependent Claim
8 words
Cesium/crown ether salts of anionic rhodium carbonyl complexes.
Claim 22
Dependent Claim
7 words
Cesium/18-crown-6 salts of anionic rhodium carbonyl complexes.
Claim 23
Dependent Claim
7 words
Cesium/18-crown-6 salts of anionic rhodium carbonyl complexes.
Claim 24
Dependent Claim
10 words
The cesium/18-crown-6 salt of an anionic rhodium sulfido carbonyl cluster.
Claim 25
Dependent Claim
10 words
The cesium/18-crown-6 salt of an anionic rhodium sulfido carbonyl cluster.
Claim 26
Dependent Claim
26 words
The salt of claim 20 in which the anionic rhodium sulfido carbonyl cluster has the empirical formula, [Rh 17 (S) 2 (CO) 32 ] 3- .
References Cited (Backward Citations)
US3989799A
Cited
US3965116A
Cited
US4115433A
Cited
US4199520A
Cited
US4180517A
Cited
US4257972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |