US4482616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlling solubility of lithium salts in liquid sulfur dioxide
Assignee: BP Corp North America Inc
•
Filing: 1983-06-27
•
Granted: 1984-11-13
•
Expires: 2003-06-27
Abstract
Abstract The solubility of lithium salts in sulfur dioxide-based solvent systems is enhanced and controlled by the presence of a salt which contains a cation selected from the group consisting of metal cation complexes, quaternary ammonium cations and organic phosphonium cations.
Inventors
- 👤 John F. Connolly
- 👤 Robert J. Thrash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:35
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/056; H01M10/0561; H01M10/0563; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/661; H01M4/663; H01M4/664; H01M4/669; H01M6/00; H01M6/14; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
115 words
A method for modifying the solubility of a lithium salt in a non-aqueous solvent system which comprises dissolving said lithium salt and a solubility modifying additive in the solvent system, wherein said solvent system comprises a major portion of sulfur dioxide, the amount of said lithium salt is in excess of the amount which is soluble in the solvent system in the absence of said solubility modifying additive, the amount of said solubility modifying additive is effective to increase the solubility of the lithium salt, and said solubility modifying additive comprises a salt which contains at least one cation selected from the group consisting of metal cation complexes, quaternary ammonium cations and organic phosphonium cations.
Claim 2
Independent Claim
115 words
A method for modifying the solubility of a lithium salt in a non-aqueous solvent system which comprises dissolving said lithium salt and a solubility modifying additive in the solvent system, wherein said solvent system comprises a major portion of sulfur dioxide, the amount of said lithium salt is in excess of the amount which is soluble in the solvent system in the absence of said solubility modifying additive, the amount of said solubility modifying additive is effective to increase the solubility of the lithium salt, and said solubility modifying additive comprises a salt which contains at least one cation selected from the group consisting of metal cation complexes, quaternary ammonium cations and organic phosphonium cations.
Claim 3
Dependent Claim
31 words
The method as set forth in claim 1 wherein the amount of said lithium salt is effective to substantially saturate the solvent system in the presence of said solubility modifying additive.
Claim 4
Dependent Claim
28 words
The method as set forth in claim 1 wherein the amount of said solubility modifying additive is effective to at least double the solubility of said lithium salt.
Claim 5
Dependent Claim
17 words
The method as set forth in claim 1 wherein said solvent system is substantially pure sulfur dioxide.
Claim 6
Dependent Claim
35 words
The method as set forth in claim 1 wherein said solubility modifying additive has a solubility in said solvent system at the temperature and pressure of use of at least about 0.1 equivalent per liter.
Claim 7
Dependent Claim
21 words
The method as set forth in claim 1 wherein said lithium salt and said solubility modifying additive contain a common anion.
Claim 8
Dependent Claim
26 words
The method as set forth in claim 1 wherein said cation is selected from the group consisting of Mn(2,2'-dipyridyl) 3 ++ and Mn(1,10-phenanthroline) 3 ++ .
Claim 9
Dependent Claim
72 words
The method as set forth in claim 1 wherein said solubility modifying additive is a quaternary ammonium salt of the formula: ##STR3## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of hydrocarbyl groups of from 1 to 20 carbon atoms, and X - is selected from the group consisting of perchlorate, tetrafluoroborate, hexafluorophosphate, dithionite, sulfate, phosphate, chloride, bromide, iodide and fluoride.
Claim 10
Dependent Claim
53 words
The method as set forth in claim 8 wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of alkyl groups of from 1 to 10 carbon atoms, and X - is selected from the group consisting of perchlorate, tetrafluoroborate, hexafluorophosphate, dithionite and sulfate.
Claim 11
Dependent Claim
71 words
The method as set forth in claim 1 wherein said solubility modifying additive is a phosphonium salt of the formula: ##STR4## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of hydrocarbyl groups containing from 1 to 20 carbon atoms, and X - is selected from the group consisting of perchlorate, tetrafluoroborate, hexafluorophosphate, dithionite, sulfate, phosphate, chloride, bromide, iodide and fluoride.
Claim 12
Dependent Claim
30 words
The method as set forth in claim 1 wherein said lithium salt is selected from the group consisting of lithium perchlorate, lithium dithionite, lithium sulfate, lithium tetrafluoroborate, and lithium hexafluorophosphate.
Claim 13
Dependent Claim
107 words
The composition prepared by the process which comprises dissolving a lithium salt and a solubility modifying additive in a non-aqueous solvent system, wherein said solvent system comprises a major portion of sulfur dioxide, the amount of said lithium salt is in excess of the amount which is soluble in the solvent system in the absence of said solubility modifying additive, the amount of said solubility modifying additive is effective to increase the solubility of the lithium salt, and said solubility modifying additive comprises a salt which contains at least one cation selected from the group consisting of metal cation complexes, quaternary ammonium cations and organic phosphonium cations.
Claim 14
Dependent Claim
107 words
The composition prepared by the process which comprises dissolving a lithium salt and a solubility modifying additive in a non-aqueous solvent system, wherein said solvent system comprises a major portion of sulfur dioxide, the amount of said lithium salt is in excess of the amount which is soluble in the solvent system in the absence of said solubility modifying additive, the amount of said solubility modifying additive is effective to increase the solubility of the lithium salt, and said solubility modifying additive comprises a salt which contains at least one cation selected from the group consisting of metal cation complexes, quaternary ammonium cations and organic phosphonium cations.
Claim 15
Dependent Claim
31 words
The composition as set forth in claim 12 wherein the amount of said lithium salt is effective to substantially saturate the solvent system in the presence of said solubility modifying additive.
Claim 16
Dependent Claim
28 words
The composition as set forth in claim 12 wherein the amount of said solubility modifying additive is effective to at least double the solubility of said lithium salt.
Claim 17
Dependent Claim
17 words
The composition as set forth in claim 12 wherein said solvent system is substantially pure sulfur dioxide.
Claim 18
Dependent Claim
26 words
The composition as set forth in claim 12 wherein said cation is selected from the group consisting of Mn(2,2'-dipyridyl) 3 ++ and Mn(1,10-phenanthroline) 3 ++ .
Claim 19
Dependent Claim
72 words
The composition as set forth in claim 12 wherein said solubility modifying additive is a quaternary ammonium salt of the formula: ##STR5## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of hydrocarbyl groups of from 1 to 20 carbon atoms, and X - is selected from the group consisting of perchlorate, tetrafluoroborate, hexafluorophosphate, dithionite, sulfate, phosphate, chloride, bromide, iodide and fluoride.
Claim 20
Dependent Claim
71 words
The composition as set forth in claim 12 wherein said solubility modifying additive is a phosphonium salt of the formula: ##STR6## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of hydrocarbyl groups containing from 1 to 20 carbon atoms, and X - is selected from the group consisting of perchlorate, tetrafluoroborate, hexafluorophosphate, dithionite, sulfate, phosphate, chloride, bromide, iodide and fluoride.
Claim 21
Dependent Claim
28 words
The composition as set forth in claim 12 wherein said lithium salt is selected from the group consisting of lithium perchlorate, lithium dithionite, lithium tetrafluoroborate, and lithium hexafluorophosphate.
Claim 22
Dependent Claim
25 words
An electrochemical cell comprising: (a) a lithium anode; (b) a positive electrode current collector; and (c) an electrolyte which comprises the composition of claim 12.
References Cited (Backward Citations)
US3511716A
Cited
US3551205A
Cited
US3567515A
Cited
US3891458A
Cited
US4139680A
Cited
US4119767A
Cited
US4252876A
Cited
US4246327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |