Controlling solubility of lithium salts in liquid sulfur dioxide
First Claim
1. 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.
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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.
35 Citations
20 Claims
- 1. 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.
- 12. 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.
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