WO2010113483A1 - ビス(フルオロスルホニル)イミド塩の製造方法及びフルオロ硫酸塩の製造方法、並びにビス(フルオロスルホニル)イミド・オニウム塩の製造方法 - Google Patents
ビス(フルオロスルホニル)イミド塩の製造方法及びフルオロ硫酸塩の製造方法、並びにビス(フルオロスルホニル)イミド・オニウム塩の製造方法 Download PDFInfo
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- C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
- C07C303/02—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof
- C07C303/22—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof from sulfonic acids, by reactions not involving the formation of sulfo or halosulfonyl groups; from sulfonic halides by reactions not involving the formation of halosulfonyl groups
Definitions
- the present invention relates to a method for producing a bis (fluorosulfonyl) imide salt, a method for producing a fluorosulfate, and a method for producing a bis (fluorosulfonyl) imide / onium salt.
- Bis (fluorosulfonyl) imide salt ((FSO 2 ) 2 N ⁇ M, M is Li, Na, K, NH 4, etc.) is a substance useful as an anion source of an ion conductive material or an ionic liquid It has been known. Further, it is known that fluorosulfate is a substance useful as an ion conductive material or a flame retardant. Furthermore, bis (fluorosulfonyl) imide onium salts are known to be ionic compounds useful as ionic liquids.
- Non-Patent Document 1 and Non-Patent Document 2 are known as methods for producing bis (fluorosulfonyl) imide.
- Non-Patent Document 1 discloses a method in which urea (CO (NH 2 ) 2 ) and fluorosulfuric acid (FSO 3 H) are mixed and then reacted by heating. Thereby, a chemical reaction as shown in the following formula (1) occurs, and bis (fluorosulfonyl) imide, ammonium sulfate (NH 4 HSO 4 ), hydrogen fluoride (HF), and carbon dioxide (CO 2 ) are generated.
- urea CO
- FSO 3 H fluorosulfuric acid
- the produced mixed liquid of bis (fluorosulfonyl) imide and fluorosulfuric acid can be fractionated from the reaction liquid.
- bis (fluorosulfonyl) imide can be isolated by distilling the obtained liquid mixture.
- Non-Patent Document 2 discloses a method of reacting bis (chlorosulfonyl) imide ((ClSO 2 ) 2 NH) with arsenic trifluoride (AsF 3 ). Thereby, a chemical reaction as shown in the following formula (2) occurs, and bis (fluorosulfonyl) imide and arsenic trichloride (AsCl 3 ) are generated.
- the produced bis (fluorosulfonyl) imide is dissolved in dichloromethane.
- the produced bis (fluorosulfonyl) imide contains fluorosulfuric acid as an impurity, and this fluorosulfuric acid is also dissolved in dichloromethane.
- NaCl is added to this solution, a chemical reaction as shown in the following formula (3) occurs to produce sodium salt of fluorosulfuric acid (FSO 3 Na) and hydrochloric acid (HCl).
- dichloromethane can be distilled off to isolate bis (fluorosulfonyl) imide.
- bis (fluorosulfonyl) imide salt As a conventional method for producing a bis (fluorosulfonyl) imide salt, as described in Non-Patent Document 3, bis (fluorosulfonyl) imide is produced by the method disclosed in Non-Patent Document 1 and Non-Patent Document 2 described above. There is known a method in which an isolated bis (fluorosulfonyl) imide is dissolved in water or the like and then neutralized with an alkali to produce a bis (fluorosulfonyl) imide salt.
- a mixture of bis (fluorosulfonyl) imide and fluorosulfuric acid obtained by the methods disclosed in Non-Patent Document 1 and Non-Patent Document 2 described above is prepared by using methylene chloride, dichloromethane or the like.
- a method is known in which a fluorosulfate is formed by using a chemical reaction represented by the above formula (3) by reacting with NaCl after dissolving in a solvent.
- bis (fluorosulfonyl) imide is produced by the method disclosed in Non-Patent Document 1 and Non-Patent Document 2 described above, and isolated bis (fluoro A method is known in which sulfonyl) imide is dissolved in water or the like and then an onium compound is added to produce a bis (fluorosulfonyl) imide onium salt.
- Non-Patent Document 2 that is, the method for producing a sodium salt of fluorosulfuric acid
- hydrochloric acid gas is by-produced to corrode the apparatus. It was.
- the generation of hydrochloric acid gas from the filtered sodium salt of fluorosulfuric acid continues for several days, the treatment method has been a big problem.
- Non-Patent Document 3 a part of the bis (fluorosulfonyl) imide salt is hydrolyzed in the step of distilling off water.
- impurities such as fluorine ions are mixed in the fluorosulfonyl) imide salt, and it is difficult to isolate a high-purity bis (fluorosulfonyl) imide salt.
- the present invention has been made in view of the above circumstances, and provides a method for producing a bis (fluorosulfonyl) imide salt capable of isolating a highly pure bis (fluorosulfonyl) imide salt safely and simply.
- the purpose is to provide.
- Another object of the present invention is to provide a safe and simple method for producing a fluorosulfate.
- an object of the present invention is to provide a safe and simple method for producing a bis (fluorosulfonyl) imide-onium salt.
- the present inventor can dissolve fluorosulfuric acid in water in the presence of bis (fluorosulfonyl) imide, and a mixed liquid of bis (fluorosulfonyl) imide and fluorosulfuric acid.
- the present inventors have found that a bis (fluorosulfonyl) imide salt and a fluorosulfate can be obtained by dissolving in water and then neutralizing with an alkali.
- the solubility of the bis (fluorosulfonyl) imide salt or fluorosulfate in the neutralized solution is low, it precipitates and separates from the neutralized solution. Therefore, the target salt can be combined with operations such as liquid separation and filtration. Can be obtained.
- the present invention includes a step of dissolving a mixed solution containing bis (fluorosulfonyl) imide and fluorosulfuric acid in water to prepare an aqueous solution, a step of neutralizing the aqueous solution with an alkali to prepare a neutralized solution, And a step of isolating the bis (fluorosulfonyl) imide salt from the neutralized solution.
- the step of isolating the bis (fluorosulfonyl) imide salt may extract the bis (fluorosulfonyl) imide salt from the neutralized solution using an organic solvent. .
- the mixed liquid containing the bis (fluorosulfonyl) imide and fluorosulfuric acid may be a reaction liquid of urea and fluorosulfuric acid.
- the alkali may be any one of compounds selected from the group consisting of MOH, M 2 CO 3 , MHCO 3 , ammonia, and an amine.
- said M is any 1 type of Na, K, Li, and an ammonium cation.
- the content of fluorine ions in the bis (fluorosulfonyl) imide salt may be 100 ppm or less.
- the content of fluorine ions in the bis (fluorosulfonyl) imide salt may be 20 ppm or less.
- the present invention also includes a step of preparing an aqueous solution by dissolving a mixed solution containing bis (fluorosulfonyl) imide and fluorosulfuric acid in water, and a step of preparing a neutralized solution by neutralizing the aqueous solution with an alkali. And a step of isolating the fluorosulfate from the neutralized solution.
- the step of isolating the fluorosulfate may filter out the fluorosulfate precipitated from the neutralization solution.
- the mixed solution containing bis (fluorosulfonyl) imide and fluorosulfuric acid may be a reaction solution of urea and fluorosulfuric acid.
- the alkali may be any one of compounds selected from the group consisting of MOH, M 2 CO 3 , MHCO 3 , ammonia, and an amine.
- said M is any 1 type of Na, K, Li, and an ammonium cation.
- the present invention also includes a step of preparing an aqueous solution by dissolving a mixed solution containing bis (fluorosulfonyl) imide and fluorosulfuric acid in water, and a step of preparing a neutralized solution by neutralizing the aqueous solution with an alkali. And a step of adding an onium compound to the neutralized solution.
- a method for producing a bis (fluorosulfonyl) imide onium salt is provided.
- the mixed liquid containing bis (fluorosulfonyl) imide and fluorosulfuric acid may be a reaction liquid of urea and fluorosulfuric acid.
- the alkali may be any one of compounds selected from the group consisting of MOH, M 2 CO 3 , MHCO 3 , ammonia, and an amine. Good.
- said M is any 1 type of Na, K, Li, and an ammonium cation.
- a mixed solution containing bis (fluorosulfonyl) imide and fluorosulfuric acid is dissolved in water to prepare an aqueous solution, and the aqueous solution is neutralized with an alkali.
- a bis (fluorosulfonyl) imide salt and a fluorosulfate can be generated.
- isolating the bis (fluorosulfonyl) imide salt from the obtained neutralized solution a highly pure bis (fluorosulfonyl) imide salt can be obtained safely and simply.
- the bis (fluorosulfonyl) imide salt when the bis (fluorosulfonyl) imide salt is dissolved in the neutralization solution, the bis (fluorosulfonyl) imide salt can be extracted from the neutralization solution by using an organic solvent. Thereby, only the bis (fluorosulfonyl) imide salt can be isolated from the neutralized solution.
- a mixed solution containing bis (fluorosulfonyl) imide and fluorosulfuric acid is dissolved in water to prepare an aqueous solution, and this aqueous solution is neutralized with an alkali, A (fluorosulfonyl) imide salt and a fluorosulfate can be obtained. Then, by isolating the fluorosulfate from the resulting neutralized solution, a highly pure fluorosulfate can be obtained safely and simply.
- the fluorosulfate when the fluorosulfate is precipitated from the neutralized solution, the fluorosulfate can be separated by filtering the neutralized solution. Thereby, only a fluorosulfate can be isolated from the said neutralization liquid.
- an aqueous solution is prepared by dissolving a mixed solution containing bis (fluorosulfonyl) imide and fluorosulfuric acid in water, and the aqueous solution is alkali-containing.
- a bis (fluorosulfonyl) imide salt and a fluorosulfate can be obtained.
- an onium salt of bis (fluorosulfonyl) imide can be obtained safely and simply by adding an onium compound to the obtained neutralized solution to cause salt exchange.
- the method for producing a bis (fluorosulfonyl) imide salt of the present invention includes a step of preparing an aqueous solution by dissolving a mixed liquid containing bis (fluorosulfonyl) imide and fluorosulfuric acid in water (an aqueous solution preparation step), and the above aqueous solution.
- a step of preparing a neutralized solution by neutralizing the solution with an alkali (a step of preparing a neutralized solution) and a step of isolating a bis (fluorosulfonyl) imide salt from the neutralized solution (isolation step). ing.
- a mixed solution containing bis (fluorosulfonyl) imide and fluorosulfuric acid is obtained.
- the mixed liquid containing bis (fluorosulfonyl) imide and fluorosulfuric acid is not particularly limited, but may be a reaction liquid of urea (CO (NH 2 ) 2 ) and fluorosulfuric acid (FSO 3 H). preferable.
- Non-Patent Document 1 For the reaction between urea (CO (NH 2 ) 2 ) and fluorosulfuric acid (FSO 3 H), a conventional reaction represented by the following formula (4) disclosed in Non-Patent Document 1 can be used.
- the mixed solution of the produced bis (fluorosulfonyl) imide and the raw material fluorosulfuric acid can be fractionated from the reaction solution by distillation under reduced pressure simultaneously with the reaction represented by the above formula (4).
- reaction between urea (CO (NH 2 ) 2 ) and fluorosulfuric acid (FSO 3 H) is not limited to the reaction mechanism disclosed in Non-Patent Document 1, but other reaction mechanisms. Also good.
- the amount of water in which the mixed solution is dissolved is preferably 1 to 50 times, more preferably 2 to 10 times the mass part of the mixed solution.
- an aqueous solution can be prepared by dissolving a mixed solution of bis (fluorosulfonyl) imide and fluorosulfuric acid in water under mild conditions.
- the aqueous solution is quickly neutralized with an aqueous alkaline solution to prepare a neutralized solution.
- the neutralization of the aqueous solution is preferably carried out until the pH is within the range of 4 to 10, and more preferably within the range of pH 7 to 9. If the pH is less than 4, it is not preferable because the production of fluorosulfate and bis (fluorosulfonyl) imide salt is insufficient. On the other hand, if the pH exceeds 10, the decomposition reaction of fluorosulfate and bis (fluorosulfonyl) imide salt proceeds, which is not preferable. Within the above range, the formation of fluorosulfate and bis (fluorosulfonyl) imide salt is sufficient, and the decomposition reaction is also suppressed, which is preferable.
- the alkali used for neutralization of the aqueous solution is an aqueous solution of any one of compounds selected from the group consisting of MOH, M 2 CO 3 , MHCO 3 , ammonia (NH 3 ), and amine (NR 1 R 2 R 3 ).
- the cation M is any one of Na, K, Li, and an ammonium cation (R 4 ⁇ N + R 1 R 2 R 3 ).
- the ammonium cation (R 4 —N + R 1 R 2 R 3 ) is not particularly limited, and ammonium ion (NH 4 + ), primary ammonium cation, secondary ammonium cation, tertiary ammonium cation Any of quaternary ammonium cations may be used.
- R 1 , R 2 , R 3 and R 4 are a hydrogen atom (H), an aliphatic alkyl group or an aromatic alkyl group.
- alkyl group methyl group, ethyl group, butyl group, pentyl group, hexyl group, octyl group, decyl group, dodecyl group, tetradecyl group, hexadecyl group, octadecyl group, octadecenyl group, octadecadienyl group, phenyl A group or the like can be appropriately mixed and used in the present invention.
- the amine may be any of primary amine, secondary amine, and tertiary amine.
- the primary amine is not particularly limited.
- the secondary amine is not particularly limited, and examples thereof include diethylamine, di-n-propylamine, di-iso-propylamine, di-n-butylamine, di-iso-butylamine, di-sec-butylamine, Examples include diethanolamine, di-n-propanolamine, di-iso-propanolamine and the like.
- the tertiary amine is not particularly limited, and examples thereof include triethylamine, tri-n-propylamine, tri-iso-propylamine, tri-n-butylamine, tri-iso-butylamine, triethanolamine, tri-amine, and the like. Examples thereof include n-propanolamine and tri-iso-propanolamine.
- bis (fluorosulfonyl) imide salt (FSO 2 ) 2 N ⁇ M)
- bis (fluorosulfonyl) imide sodium salt bis (fluorosulfonyl) imide potassium salt
- bis (fluorosulfonyl) imide lithium salt bis (fluoro And sulfonyl) imidoammonium salts.
- fluorosulfate examples include sodium fluorosulfate, potassium fluorosulfate, lithium fluorosulfate, and ammonium fluorosulfate.
- a bis (fluorosulfonyl) imide salt is isolated from the neutralized solution.
- the bis (fluorosulfonyl) is separated from the neutralized solution by a separation operation such as liquid separation (when separated as a liquid) or filtration (when precipitated as a solid).
- Imide salts can be isolated.
- the bis (fluorosulfonyl) imide salt When the bis (fluorosulfonyl) imide salt is dissolved in the neutralization solution, the bis (fluorosulfonyl) imide salt can be extracted from the neutralization solution by using an organic solvent. Thereby, only the bis (fluorosulfonyl) imide salt can be isolated from the neutralized solution.
- the organic solvent for extracting the bis (fluorosulfonyl) imide salt from the neutralized solution is not particularly limited as long as it is an organic solvent in which the bis (fluorosulfonyl) imide salt is dissolved and separated from water.
- an acetate ester solvent is preferably used, and ethyl acetate is particularly preferable.
- the amount of solvent required for extraction of the bis (fluorosulfonyl) imide salt is preferably 1 to 50 times, more preferably 10 to 20 times the mass part of the bis (fluorosulfonyl) imide salt. preferable.
- the amount of the solvent is less than 10 times, extraction of the bis (fluorosulfonyl) imide salt is insufficient, which is not preferable.
- it exceeds 50 times it is economically useless.
- the bis (fluorosulfonyl) imide salt can be sufficiently extracted, which is preferable.
- the bis (fluorosulfonyl) imide salt When the produced bis (fluorosulfonyl) imide salt is solid at room temperature, the bis (fluorosulfonyl) imide salt can be obtained as crystals by distilling off the organic solvent used for extraction. As described above, a bis (fluorosulfonyl) imide salt can be produced.
- Non-Patent Document 3 a part of the bis (fluorosulfonyl) imide salt is hydrolyzed in the step of distilling off water. Since it decomposes, impurities such as fluorine ions are mixed in the bis (fluorosulfonyl) imide salt, and the isolated bis (fluorosulfonyl) imide salt has a problem that many impurities are contained. Specifically, the impurity contained several hundred ppm to several thousand ppm of fluorine ions.
- Non-Patent Document 3 also describes a purification method by recrystallization using ethanol, but almost no effect of reducing fluorine ions by recrystallization was observed.
- a bis (fluorosulfonyl) imide salt is precipitated from an aqueous solution containing the bis (fluorosulfonyl) imide salt, or bis (fluorosulfonyl) imide.
- the salt is dissolved, only the bis (fluorosulfonyl) imide salt is extracted with an organic solvent, and the extracted organic solvent is distilled off to obtain a bis (fluorosulfonyl) imide salt.
- the fluorine ion content in the bis (fluorosulfonyl) imide salt can be measured, for example, by ion chromatography. Specifically, the content of fluorine ions by ion chromatography can be measured as follows.
- a sample is dissolved in 50 mL of ion exchange water to prepare a measurement sample.
- the fluorine ion content in the sample is measured using, for example, an ion chromatography system ICS-2000 (column: IonPacAS19, detector: electrical conductivity detector) manufactured by DIONEX, and 20 mmol / L hydroxylation.
- ICS-2000 columnumn: IonPacAS19, detector: electrical conductivity detector
- a potassium solution is used as an eluent (flow rate: 1.0 ml / min).
- the method for producing a fluorosulfate of the present invention comprises a step of preparing an aqueous solution by dissolving a mixed solution containing bis (fluorosulfonyl) imide and fluorosulfuric acid in water (a step of preparing an aqueous solution), and the above aqueous solution in an alkali. It comprises a step of adding and preparing a neutralized solution (a step of preparing a neutralized solution) and a step of isolating the fluorosulfate from the neutralized solution (isolation step). Since the preparation process of the aqueous solution and the preparation process of the neutralization solution are the same as the above-described method for producing the bis (fluorosulfonyl) imide salt, description thereof is omitted. (Isolation process)
- fluorosulfate is isolated from the neutralized solution prepared in the neutralizing solution preparation step.
- the solubility of fluorosulfate in a neutralized solution is low, it often precipitates as a solid from the neutralized solution.
- the bis (fluorosulfonyl) imide salt is often dissolved in the neutralizing solution. Therefore, the fluorosulfate can be isolated from the neutralized solution by a separation operation such as filtration of the neutralized solution.
- the method for producing a bis (fluorosulfonyl) imide-onium salt of the present invention comprises a step of preparing an aqueous solution by dissolving a mixed solution containing bis (fluorosulfonyl) imide and fluorosulfuric acid in water (a step of preparing an aqueous solution), A step of neutralizing the aqueous solution with an alkali to prepare a neutralization solution (a step of preparing a neutralization solution), and a step of adding an onium compound to the neutralization solution (an addition step of the onium compound). . Since the preparation step of the aqueous solution and the preparation step of the neutralization solution are the same as the above-described method for producing a bis (fluorosulfonyl) imide salt, description thereof is omitted. (Onium compound addition process)
- an onium compound is added to the neutralization solution prepared in the neutralization solution preparation step. This causes salt exchange between the generated bis (fluorosulfonyl) imide salt ((FSO 2 ) 2 N ⁇ M) and the onium compound, and bis (fluorosulfonyl) imide anion ((FSO 2 ) 2 N ⁇ ) and onium An ionic compound with the salt is produced.
- the onium compound is not particularly limited, but examples include a salt composed of an onium cation and a halogen ion, nitrate ion, sulfate ion, phosphate ion, perchlorate ion, methanesulfonate ion, toluenesulfonate ion, and the like. Is done.
- Examples of the onium cation include at least one produced by coordination of a cationic atomic group to a compound containing an element having a lone electron pair such as nitrogen, sulfur, oxygen, phosphorus, selenium, tin, iodine, and antimony. There is no particular limitation as long as it is a cation having two organic groups.
- onium ions examples include symmetrical ammonium cations such as tetramethylammonium cation, tetraethylammonium cation, and tetrapropylammonium cation; ethyltrimethylammonium cation, vinyltrimethylammonium cation, triethylmethylammonium cation, triethylpropylammonium Shortest substituents such as cation, diethyldimethylammonium cation, tributylethylammonium cation, triethylisopropylammonium cation, N, N-dimethylpyrrolidinium cation, N-methyl-N-ethylpyrrolidinium cation, triethylmethoxymethylammonium cation
- the carbon number of the longest substituent is 50% or more and less than 100% (below) Also referred to as symmetry.) Ammonium
- Asymmetric sulfonium cations such as: tetramethylphosphonium cation, tetraethylphosphonium cation, tetrapropylphosphonium cation, tetrabutylphosphonium cation, tetraoctylphosphonium cation, tetraphenylphosphonium cation, etc .; trimethylethylphosphonium cation, triethylmethylphosphonium cation And asymmetric phosphonium cations such as hexyltrimethylphosphonium cation and trimethyloctylphosphonium cation.
- an imidazole-based onium salt and an ammonium-based onium salt it is particularly preferable to use an imidazole-based onium salt and an ammonium-based onium salt. In this way, a bis (fluorosulfonyl) imide onium salt can be produced.
- a mixed solution containing bis (fluorosulfonyl) imide and fluorosulfuric acid is dissolved in water to prepare an aqueous solution.
- a bis (fluorosulfonyl) imide salt and a fluorosulfate By neutralizing with alkali, it is possible to produce a bis (fluorosulfonyl) imide salt and a fluorosulfate.
- a highly pure bis (fluorosulfonyl) imide salt can be obtained safely and simply.
- the bis (fluorosulfonyl) imide salt when the bis (fluorosulfonyl) imide salt is dissolved in the neutralization solution, the bis (fluorosulfonyl) imide salt can be extracted from the neutralization solution by using an organic solvent. Thereby, only the bis (fluorosulfonyl) imide salt can be isolated from the neutralized solution.
- a mixed solution containing bis (fluorosulfonyl) imide and fluorosulfuric acid is dissolved in water to prepare an aqueous solution, and this aqueous solution is neutralized with an alkali, A (fluorosulfonyl) imide salt and a fluorosulfate can be obtained. Then, by isolating the fluorosulfate from the resulting neutralized solution, a highly pure fluorosulfate can be obtained safely and simply.
- the fluorosulfate when the fluorosulfate is precipitated from the neutralized solution, the fluorosulfate can be separated by filtering the neutralized solution. Thereby, only a fluorosulfate can be isolated from the said neutralization liquid.
- an aqueous solution is prepared by dissolving a mixed solution containing bis (fluorosulfonyl) imide and fluorosulfuric acid in water, and the aqueous solution is obtained with an alkali.
- a bis (fluorosulfonyl) imide salt and a fluorosulfate can be obtained.
- an onium salt of bis (fluorosulfonyl) imide can be obtained safely and simply by adding an onium compound to the obtained neutralized solution to cause salt exchange.
- Example 1 Example 1
- a 5 L polytetrafluoroethylene (PTFE) reactor equipped with a stirrer and a thermometer was charged with 3.2 kg of fluorosulfuric acid, and 800 g of urea was added little by little while cooling to prepare a fluorosulfuric acid solution of urea. .
- PTFE polytetrafluoroethylene
- a 5 L PTFE-coated stainless steel reactor equipped with a stirrer, thermometer, and gas flow meter was charged with 2.4 kg of fluorosulfuric acid and 80 g of bis (fluorosulfonyl) imide and heated at 120 ° C. to urea.
- the generation of carbon dioxide gas was confirmed at the same time as the dropping, and a total of 299 L of gas was generated at the end of dropping.
- the reaction-terminated liquid was cooled to room temperature and dissolved gradually in 15 kg of water. Thereafter, 3.6 kg of potassium carbonate was added, neutralized to pH 9, and the precipitated crystals were filtered and dried at 60 ° C. to obtain 4.4 kg of fluorosulfuric acid potassium salt.
- the filtrate was extracted twice with 7 kg of ethyl acetate and once with 2 kg.
- Example 4 100 g of the reaction solution obtained in the same manner as in Example 1 was dissolved in 200 g of water. Thereafter, the solution was neutralized to pH 7 with 46 g of lithium carbonate. Excess lithium carbonate was filtered off, and the aqueous layer was extracted twice with 100 g of ethyl acetate and once with 30 g. The ethyl acetate layer was washed with 30 g of ion-exchanged water, and the ethyl acetate layer was distilled off to obtain 14.5 g of bis (fluorosulfonyl) imide lithium (35% yield based on urea). The fluorine ion concentration of the obtained bis (fluorosulfonyl) imide lithium was 8 ppm.
- Example 4 100 g of the reaction solution obtained in the same manner as in Example 1 was dissolved in 200 g of water. Thereafter, the solution was neutralized to pH 7 with 46 g of lithium carbonate. Excess lithium carbonate was filtered off
- Example 5 200 g of the reaction solution obtained in the same manner as in Example 1 was dissolved in 800 g of water. Thereafter, the solution was neutralized with 52 g of potassium carbonate to pH 7, and the precipitated potassium salt of fluorosulfuric acid was separated by filtration. An aqueous solution in which 37 g of tetrapropylammonium bromide was dissolved was dropped into the filtrate, and at the same time, crystals of bis (fluorosulfonyl) imide / tetrapropylammonium were deposited, separated by filtration, and dried in a dryer at 60 ° C. 48 g of imidotetrapropylammonium was obtained (yield based on urea: 30%). The resulting bis (fluorosulfonyl) imide / tetrapropylammonium had a fluorine ion concentration of 1 ppm and a melting point of 140 to 141 ° C. (Example 5)
- the reaction solution performed in the same manner as in Example 1 was distilled under reduced pressure to obtain a mixture of fluorosulfuric acid and bis (fluorosulfonyl) imide. 645 g of this mixture was dissolved in 3230 g of methylene chloride, and 170 g of sodium chloride was added to produce potassium fluorosulfate, which was separated by filtration. Methylene chloride was distilled off from the filtrate, and then atmospheric distillation was performed to obtain 326 g of bis (fluorosulfonyl) imide. This was dissolved in 978 g of water, neutralized to pH 7 with 154 g of potassium carbonate, and water was distilled off to obtain 313 g of potassium bis (fluorosulfonyl) imide. The obtained bis (fluorosulfonyl) imide potassium had a fluorine ion concentration of 354 ppm.
- the present invention relates to a method for producing a bis (fluorosulfonyl) imide salt, a method for producing a fluorosulfate, and a method for producing a bis (fluorosulfonyl) imide / onium salt.
- the method for producing a bis (fluorosulfonyl) imide salt, the method for producing a fluorosulfate, and the method for producing a bis (fluorosulfonyl) imide onium salt the mixture containing bis (fluorosulfonyl) imide and fluorosulfuric acid.
- a bis (fluorosulfonyl) imide salt and a fluorosulfate By dissolving the liquid in water to prepare an aqueous solution and neutralizing the aqueous solution with an alkali, a bis (fluorosulfonyl) imide salt and a fluorosulfate can be produced. Then, an onium salt of bis (fluorosulfonyl) imide can be obtained safely and simply by adding an onium compound to the obtained neutralized solution to cause salt exchange.
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Abstract
Description
また、本発明は、安全且つ簡便なフルオロ硫酸塩の製造方法を提供することを目的とする。
さらに、本発明は、安全且つ簡便なビス(フルオロスルホニル)イミド・オニウム塩の製造方法を提供することを目的とする。
但し、上記Mは、Na,K,Li,アンモニウムカチオンのいずれか一種である。
但し、上記Mは、Na,K,Li,アンモニウムカチオンのいずれか一種である。
但し、上記Mは、Na,K,Li,アンモニウムカチオンのいずれか一種である。
<ビス(フルオロスルホニル)イミド塩の製造方法>
(水溶液の調製工程)
(中和液の調製工程)
(単離工程)
以上のようにして、ビス(フルオロスルホニル)イミド塩を製造することができる。
<フルオロ硫酸塩の製造方法>
(単離工程)
<ビス(フルオロスルホニル)イミド・オニウム塩の製造方法>
(オニウム化合物の添加工程)
(実施例1)
(実施例2)(アンモニウム塩の例)
(実施例3)(Liを用いた例)
(実施例4)
(実施例5)
(比較例)
Claims (13)
- ビス(フルオロスルホニル)イミドとフルオロ硫酸とを含む混合液を水に溶解させて水溶液を調製する工程と、
前記水溶液をアルカリで中和して中和液を調製する工程と、
前記中和液からビス(フルオロスルホニル)イミド塩を単離する工程と、を備えることを特徴とするビス(フルオロスルホニル)イミド塩の製造方法。 - 前記ビス(フルオロスルホニル)イミド塩を単離する工程が、前記中和液から有機溶剤でビス(フルオロスルホニル)イミド塩を抽出することを特徴とする請求項1に記載のビス(フルオロスルホニル)イミド塩の製造方法。
- ビス(フルオロスルホニル)イミドとフルオロ硫酸とを含む前記混合液が、尿素とフルオロ硫酸との反応液であることを特徴とする請求項1又は2に記載のビス(フルオロスルホニル)イミド塩の製造方法。
- 前記アルカリが、MOH、M2CO3、MHCO3、アンモニア、アミンからなる群から選ばれた化合物のいずれか一種であることを特徴とする請求項1から3のいずれか一項に記載のビス(フルオロスルホニル)イミド塩の製造方法。
但し、上記Mは、Na,K,Li,アンモニウムカチオンのいずれか一種である。 - ビス(フルオロスルホニル)イミド塩のフッ素イオンの含有量が、100ppm以下であることを特徴とする請求項1から4のいずれか一項に記載のビス(フルオロスルホニル)イミド塩の製造方法。
- ビス(フルオロスルホニル)イミド塩のフッ素イオンの含有量が、20ppm以下であることを特徴とする請求項1から4のいずれか一項に記載のビス(フルオロスルホニル)イミド塩の製造方法。
- ビス(フルオロスルホニル)イミドとフルオロ硫酸とを含む混合液を水に溶解させて水溶液を調製する工程と、
前記水溶液をアルカリで中和して中和液を調製する工程と、
前記中和液からフルオロ硫酸塩を単離する工程と、を備えることを特徴とするフルオロ硫酸塩の製造方法。 - フルオロ硫酸塩を単離する工程が、前記中和液から析出したフルオロ硫酸塩を濾別することを特徴とする請求項7に記載のフルオロ硫酸塩の製造方法。
- ビス(フルオロスルホニル)イミドとフルオロ硫酸とを含む前記混合液が、尿素とフルオロ硫酸との反応液であることを特徴とする請求項7又は8に記載のフルオロ硫酸塩の製造方法。
- 前記アルカリが、MOH、M2CO3、MHCO3、アンモニア、アミンからなる群から選ばれた化合物のいずれか一種であることを特徴とする請求項7から9のいずれか一項に記載のフルオロ硫酸塩の製造方法。
但し、上記Mは、Na,K,Li,アンモニウムカチオンのいずれか一種である。 - ビス(フルオロスルホニル)イミドとフルオロ硫酸とを含む混合液を水に溶解させて水溶液を調製する工程と、
前記水溶液をアルカリで中和して中和液を調製する工程と、
前記中和液にオニウム化合物を添加する工程と、を備えることを特徴とするビス(フルオロスルホニル)イミド・オニウム塩の製造方法。 - ビス(フルオロスルホニル)イミドとフルオロ硫酸とを含む前記混合液が、尿素とフルオロ硫酸との反応液であることを特徴とする請求項11に記載のビス(フルオロスルホニル)イミド・オニウム塩の製造方法。
- 前記アルカリが、MOH、M2CO3、MHCO3、アンモニア、アミンからなる群から選ばれた化合物のいずれか一種であることを特徴とする請求項11又は12に記載のビス(フルオロスルホニル)イミド・オニウム塩の製造方法。
但し、上記Mは、Na,K,Li,アンモニウムカチオンのいずれか一種である。
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CN2010800107901A CN102341343B (zh) | 2009-03-31 | 2010-03-30 | 双(氟磺酰基)酰亚胺盐的制造方法及氟代硫酸盐的制造方法、以及双(氟磺酰基)酰亚胺鎓盐的制造方法 |
US13/258,628 US8580220B2 (en) | 2009-03-31 | 2010-03-30 | Method for producing bis(fluorosulfonyl)imide salt, method for producing fluorosulfate, and method for producing bis(fluorosulfonyl)imide onium salt |
EP10758263.7A EP2415709B1 (en) | 2009-03-31 | 2010-03-30 | Method for producing bis(fluorosulfonyl)imide salt |
KR1020117022534A KR101364432B1 (ko) | 2009-03-31 | 2010-03-30 | 비스(플루오로술포닐)이미드염의 제조 방법 및 플루오로황산염의 제조 방법, 그리고 비스(플루오로술포닐)이미드·오늄염의 제조 방법 |
US14/052,004 US9156692B2 (en) | 2009-03-31 | 2013-10-11 | Method for producing bis(fluorosulfonyl)imide salt, method for producing fluorosulfate, and method for producing bis(fluorosulfonyl)imide onium salt |
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JP2009238344A JP5443118B2 (ja) | 2009-03-31 | 2009-10-15 | ビス(フルオロスルホニル)イミド塩の製造方法、ビス(フルオロスルホニル)イミド塩及びフルオロ硫酸塩の製造方法、並びにビス(フルオロスルホニル)イミド・オニウム塩の製造方法 |
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US14/052,004 Division US9156692B2 (en) | 2009-03-31 | 2013-10-11 | Method for producing bis(fluorosulfonyl)imide salt, method for producing fluorosulfate, and method for producing bis(fluorosulfonyl)imide onium salt |
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M.BERAN ET AL.: "A New Method of the Preparation of Imido-bis(sulfuric acid) Dihalogenide, (F,Cl), and the Potassium Salt of Imido-bis(sulfuric acid) Difluoride", ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, vol. 631, no. 1, 2005, pages 55 - 59, XP055014688 * |
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Also Published As
Publication number | Publication date |
---|---|
KR20110131241A (ko) | 2011-12-06 |
EP2415709A4 (en) | 2014-02-12 |
JP5443118B2 (ja) | 2014-03-19 |
US20140037529A1 (en) | 2014-02-06 |
KR101364432B1 (ko) | 2014-02-17 |
US9156692B2 (en) | 2015-10-13 |
CN102341343B (zh) | 2013-12-25 |
US20120014859A1 (en) | 2012-01-19 |
EP2415709A1 (en) | 2012-02-08 |
US8580220B2 (en) | 2013-11-12 |
JP2010254543A (ja) | 2010-11-11 |
CN102341343A (zh) | 2012-02-01 |
EP2835348B1 (en) | 2017-10-11 |
EP2835348A2 (en) | 2015-02-11 |
EP2835348A3 (en) | 2015-06-03 |
EP2415709B1 (en) | 2017-03-08 |
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