CN107188138A - A kind of preparation method of pair of fluorine sulfimide lithium - Google Patents

A kind of preparation method of pair of fluorine sulfimide lithium Download PDF

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CN107188138A
CN107188138A CN201710299616.7A CN201710299616A CN107188138A CN 107188138 A CN107188138 A CN 107188138A CN 201710299616 A CN201710299616 A CN 201710299616A CN 107188138 A CN107188138 A CN 107188138A
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lithium
fluorine sulfimide
preparation
fluorine
pair
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CN107188138B (en
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罗乾
巩梦洁
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Changde Dadu New Material Co ltd
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Huizhou Avenue New Mstar Technology Ltd
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    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00Nitrogen; Compounds thereof
    • C01B21/082Compounds containing nitrogen and non-metals and optionally metals
    • C01B21/086Compounds containing nitrogen and non-metals and optionally metals containing one or more sulfur atoms

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Abstract

The invention discloses the preparation method of a kind of pair of fluorine sulfimide lithium, comprise the following steps:1) fluorine sulfonamide lithium is prepared;2) vikane is prepared, vikane is passed through in fluorine sulfonamide lithium solution, acid binding agent is added, double fluorine sulfimide ammonium salts are prepared;3) double fluorine sulfimide ammonium salts are dissolved into the aqueous solution, are exchanged by acidic resins and obtain double fluorine sulfimide aqueous solution;4) lithium carbonate is added, regulation pH value is filtered to remove insoluble matter in neutrality, and most of water is removed under reduced pressure, adds weakly polar organic solvent and separate out double fluorine sulfimide lithium crude products, be further dried under reduced pressure;5) into double fluorine sulfimide lithium crude products, polar solvent is added, stirring and dissolving is filtered to remove insoluble matter, intensive polar solvent is removed under reduced pressure, added weak polar solvent and recrystallized, be dried under reduced pressure after filtering and obtain product.The preparation method of the present invention is simple, and the reaction time is short, high income, and can effectively control metal ion and anionic impurity, obtains the product of high-purity.

Description

A kind of preparation method of pair of fluorine sulfimide lithium
Technical field
The present invention relates to the preparation method of technical field of compound preparation, more particularly to a kind of pair of fluorine sulfimide lithium.
Background technology
Fluoro sulfimide and related compound play extremely important effect in materials chemistry and electrochemical energy storage field, Especially lithium trifluoromethanesulp,onylimide and double fluorine sulfimide lithiums has important commercial application valency in lithium ion battery Value.Double fluorine sulfimides are the important raw and processed materials for preparing lithium salts and other alkali metal salts and derivative, double fluorine sulfimides one As be fluorinated and prepare by double chlorine sulfimides, the preparation technology of double chlorine sulfimides mainly includes:1) phosphorus pentachloride, sulfamic acid and Chlorosulfonic acid reaction prepares (K.Ruff et al, Inorg.Synth.1968,11,138);2) sulfamic acid, thionyl chloride and chlorine Sulfonic acid reaction prepares (M.Beran, Z.Anorg Allg Chem., 2005,631,55).Fluorination reagent mainly have arsenic trifluoride, Antimony trifluoride, zinc fluoride, anhydrous hydrogen fluoride, bismuth fluoride etc..Double fluorine sulfimide lithium preparation methods have:1) double fluorine sulfimides Potassium and other lithium salts exchange systems standby (such as lithium perchlorate and LiBF4) (M.Beran, Polyhedron, 2006,25, 1292);2) double fluorine sulfimide or ammonium salt and lithium carbonate (or lithium hydroxide) neutralizations prepare (CN101980955A, CN102405189A, CN102917979A, CN104925765A).But, there is low yield, ionic impurity and contain in existing method Measure high defect.
The content of the invention
It is an object of the invention to provide a kind of preparation side of the double fluorine sulfimide lithiums of the high-purity needed for lithium ion battery Method.
To solve above technical problem, the present invention is adopted the following technical scheme that:A kind of preparation side of pair of fluorine sulfimide lithium Method, specifically includes following steps:
1) fluorine sulfonamide prepares fluorine sulfonamide lithium in the aqueous solution or organic solvent with lithium carbonate effect;
2) chlorosulfuric acid and fluorination reagent reaction prepare vikane, and prepared vikane is passed directly into fluorine sulfonamide lithium solution In, tertiary amine is added as acid binding agent, prepares double fluorine sulfimide ammonium salts;
3) by step 2) described in double fluorine sulfimide ammonium salts be dissolved into the aqueous solution, exchanged by acidic resins and obtain double The fluorine sulfimide aqueous solution;
4) lithium carbonate is added into double fluorine sulfimide aqueous solution, regulation aqueous ph value is filtered to remove insoluble in neutrality Thing, is removed under reduced pressure most of water, adds weakly polar organic solvent and separates out double fluorine sulfimide lithium crude products, further decompression is dry It is dry;
5) step 4) in the double fluorine sulfimide lithium crude products of the drying for preparing, add dry polar solvent, stirring Dissolving, is filtered to remove insoluble matter, and most of intensive polar solvent is removed under reduced pressure, and adds weak polar solvent and carries out recrystallization operation, mistake It is dried under reduced pressure after filter and obtains product.
It is preferred that, step 1) described in organic solvent include acetonitrile, acetone, dimethyl carbonate, diethyl carbonate, carbonic acid first At least one of ethyl ester, ethyl acetate, propyl acetate, butyl acetate, ether and methyl tertiary butyl ether(MTBE).
It is preferred that, step 2) described in fluorination reagent include sodium fluoride, potassium fluoride, zinc fluoride, antimony trifluoride at least The nonstoichiometric molar ratio of one kind, chlorosulfuric acid and fluorination reagent is 1:2~1:5.
It is preferred that, the nonstoichiometric molar ratio of the chlorosulfuric acid and fluorination reagent is 1:2.2~1:4, reaction temperature is 25 ~80 DEG C.
It is preferred that, step 2) described in tertiary amine include triethylamine, tripropyl amine (TPA), tri-n-butylamine, diisopropyl ethyl amine, pyridine, At least one of picoline, imidazoles.
It is preferred that, step 3) described in acidic resins for sulfonic acid type highly acidic resin or carboxylic acid type weakly acidic resin.
It is preferred that, step 4) described in weak polar solvent be dichloromethane, chloroform, n-hexane, hexamethylene, first Benzene, dimethylbenzene, chlorobenzene, fluorobenzene.
It is preferred that, step 4) described in the temperature that is dried under reduced pressure be 60~120 DEG C.
It is preferred that, step 5) described in polar solvent be dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, acetic acid Ethyl ester, propyl acetate, butyl acetate, propyl propionate, acetonitrile, propionitrile, acetone, tetrahydrofuran, ether, methyl tertiary butyl ether(MTBE), third Ether, butyl ether, glycol dimethyl ether.
It is preferred that, step 5) described in weak polar solvent be dichloromethane, chloroform, n-hexane, hexamethylene, first Benzene, dimethylbenzene, chlorobenzene, fluorobenzene.
Preparation technology that the present invention is provided is simple, and the reaction time is short, high income, and can effectively control metal ion and it is cloudy from Sub- impurity, can prepare double fluorine sulfimide lithium target products of high-purity.
Embodiment
Illustrate embodiments of the present invention below by way of specific instantiation, those skilled in the art can be by this specification Disclosed content understands other advantages and effect of the present invention easily.The one or more method and steps mentioned in the present invention Other method step can also be present or be gone back between the step of these are specifically mentioned by not repelling before and after the combination step Other method step is may be inserted into, unless otherwise indicated.
Embodiment 1:
FSO2NH2+Li2CO3→FSO2NHLi
SO2Cl2+KF→SO2F2
FSO2NHLi+SO2F2+Py→FSO2NHSO2F·Py
FSO2NHSO2F+Li2CO3→FSO2NLiSO2F
Added in 500mL reaction bulb and acetonitrile is added under 49.5g (0.5mol) fluorine sulfonamide, ice-water bath as solvent, plus Enter 20.4g (0.275mol) Carbon Dioxide lithium, stir to neutrality, be filtered under diminished pressure, obtain being dried under reduced pressure after clear filtrate, obtain fluorine Sulfonamide lithium crude product.
Prepared fluorine sulfonamide lithium is walked in 500mL reaction bulb, addition, 200mL is added and dries acetonitrile and 39.5g (0.5mol) pyridine, ice-water bath separately takes 500mL reaction bulb to add 135g (1mol) chlorosulfuric acid, 200mL carbonic acid diethyls Ester, 69.6g (1.2mol) anhydrous potassium fluoride, magnetic agitation, 80 degree of temperature control, reaction bulb connects the reflux condensing tube of -20 degree, condensation The pipe other end is passed through in fluorine sulfonamide lithium/acetonitrile solution, is stopped after 8 hours of reaction.It is filtered under diminished pressure and obtains clear filtrate, depressurizes Acetonitrile is removed, double fluorine sulfimide pyridiniujms are obtained.
Double fluorine sulfimide pyridiniujms are dissolved into water, exchanged by sulfonic acid type acid resin, double fluorine sulfimides are obtained The aqueous solution, adds lithium carbonate, and regulation pH value is neutrality, is filtered to remove solid, be concentrated under reduced pressure the aqueous solution, and addition toluene separates out brilliant It is dried under reduced pressure after body, filtering.Insoluble matter is filtered to remove after adding dry dimethyl carbonate solvent, dissolving, is removed under reduced pressure big Dimethyl carbonate is measured, toluene is added and carries out recrystallization operation, gained solid obtains 65 grams of products after being dried under reduced pressure.(19F-NMR, 51.4;Cl-ND;SO4 2-ND;K<1ppm;Na<5ppm;Mg<1ppm;Ca<1ppm;Fe ND;Hg ND;Cr ND).
Embodiment 2:
FSO2NH2+LiOH→FSO2NHLi
SO2Cl2+NaF→SO2F2
FSO2NHLi+SO2F2+(C2H5)3N→FSO2NHSO2F·Py
FSO2NHSO2F+LiOH→FSO2NLiSO2F
Added in 500mL reaction bulb and acetonitrile is added under 49.5g (0.5mol) fluorine sulfonamide, ice-water bath as solvent, plus Enter 6.6g (0.275mol) lithium hydroxide, stir to neutrality, be filtered under diminished pressure, obtain being dried under reduced pressure after clear filtrate, obtain fluorine sulphur Acid amides lithium crude product.
Prepared fluorine sulfonamide lithium is walked in 500mL reaction bulb, addition, 200mL is added and dries acetonitrile and 50.5g (0.5mol) triethylamine, ice-water bath separately takes 500mL reaction bulb to add 135g (1mol) chlorosulfuric acid, 200mL carbonic acid diethyls Ester, 50.4g (1.2mol) anhydrous sodium fluoride, magnetic agitation, 80 degree of temperature control, reaction bulb connects the reflux condensing tube of -20 degree, condensation The pipe other end is passed through in fluorine sulfonamide lithium/acetonitrile solution, is stopped after 8 hours of reaction.It is filtered under diminished pressure and obtains clear filtrate, depressurizes Acetonitrile is removed, difluoro sulfimide triethylamine salt is obtained.
Difluoro sulfimide triethylamine salt is dissolved into water, exchanged by sulfonic acid type acid resin, difluoro sulphonyl is obtained sub- Amine aqueous solution, adds lithium hydroxide, and regulation pH value is neutrality, is filtered to remove solid, be concentrated under reduced pressure the aqueous solution, adds toluene and separates out It is dried under reduced pressure after crystal, filtering.Insoluble matter is filtered to remove after adding dry dimethyl carbonate solvent, dissolving, is removed under reduced pressure A large amount of dimethyl carbonates, add toluene and carry out recrystallization operation, gained solid obtains 63 grams of products after being dried under reduced pressure.(19F-NMR, 51.6;Cl-ND;SO4 2-ND;K<1ppm;Na<5ppm;Mg<1ppm;Ca<1ppm;Fe ND;Hg ND;Cr ND).
Comparative example 1:
21.9g (0.1mol) double fluorine sulfimide potassium are added in 500mL reaction bulb, 100mL carbonic acid two is added at room temperature Methyl esters adds 9.4g (0.1mol) LiBF4 as solvent, stirs 3 hours, is filtered under diminished pressure, obtains subtracting after clear filtrate Press dry dry, obtain the double fluorine sulfimide lithium products of 18.2g.(19F-NMR,51.4;Cl-10ppm;SO4 2-20ppm;K 1800ppm; Na 5ppm;Mg<1ppm;Ca<1ppm;Fe ND;Hg ND;Cr ND).
Comparative example 2:
42.8g (0.2mol) double chlorine sulfimides are added in 500mL reaction bulb, 24.7g (0.24mol) is added at room temperature Anhydrous zinc fluoride, after 5 hours of stirring, water pump vacuum distillation obtains double fluorine sulfimide crude products, distills three times and obtains repeatedly The double fluorine sulfimides of 27.2g.
The double fluorine sulfimides of 27.2g are dissolved into 100mL DMC, 15.2g (0.15mol) triethylamine, Ran Houjia is added Enter 50mL water and 12.6g lithium hydroxides, organic phase is separated after 2 hours of stirring, double fluorine sulfimide lithiums are obtained after being dried under reduced pressure Crude product, dimethyl carbonate/toluene Mixed Solvent recrystallization, filtering is dried under reduced pressure and obtains 16.8 grams of double fluorine sulfimide lithiums.19F-NMR,51.5;Cl-12ppm;SO4 2-15ppm;K<2ppm;Na<5ppm;Mg<1ppm;Ca<1ppm;Fe ND;Hg ND;Cr ND)。
Due to dichloro sulfimide and difluoro sulfimide boiling point it can be seen from embodiment 1,2 and comparative example 1,2 results Difference is not too big, causes difluoro sulfimide to mix the chlorion of more amount unavoidably, therefore product chlorinity is higher.Comparative example 1 prepares difluoro sulfimide lithium using ion-exchange, because accessory substance sylvite is difficult fully to be gone by the method for precipitation/filtration Remove, cause product potassium content very high, far beyond the specification of lithium-ion battery electrolytes.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as Protection scope of the present invention.

Claims (10)

1. the preparation method of a kind of pair of fluorine sulfimide lithium, it is characterised in that comprise the following steps:
1) fluorine sulfonamide prepares fluorine sulfonamide lithium in the aqueous solution or organic solvent with lithium carbonate effect;
2) chlorosulfuric acid and fluorination reagent reaction prepare vikane, and prepared vikane is passed directly into fluorine sulfonamide lithium solution, Tertiary amine is added as acid binding agent, double fluorine sulfimide ammonium salts are prepared;
3) by step 2) described in double fluorine sulfimide ammonium salts be dissolved into the aqueous solution, exchanged by acidic resins and obtain double fluorine sulphurs The acid imide aqueous solution;
4) lithium carbonate is added into double fluorine sulfimide aqueous solution, regulation aqueous ph value is filtered to remove insoluble matter, subtracted in neutrality Pressure removes most of water, adds weakly polar organic solvent and separates out double fluorine sulfimide lithium crude products, is further dried under reduced pressure;
5) step 4) in the double fluorine sulfimide lithium crude products of the drying for preparing, add dry polar solvent, stirring and dissolving, Insoluble matter is filtered to remove, most of intensive polar solvent is removed under reduced pressure, weak polar solvent is added and carries out recrystallization operation, subtract after filtering Pressure is dried to obtain product.
2. the preparation method of according to claim 1 pair of fluorine sulfimide lithium, it is characterised in that:Step 1) described in it is organic Solvent includes acetonitrile, acetone, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, ethyl acetate, propyl acetate, acetic acid fourth At least one of ester, ether and methyl tertiary butyl ether(MTBE).
3. the preparation method of according to claim 1 pair of fluorine sulfimide lithium, it is characterised in that:Step 2) described in fluorination Reagent includes at least one of sodium fluoride, potassium fluoride, zinc fluoride, antimony trifluoride, the stoichiometry of chlorosulfuric acid and fluorination reagent Mol ratio is 1:2~1:5.
4. the preparation method of according to claim 3 pair of fluorine sulfimide lithium, it is characterised in that:The chlorosulfuric acid and fluorination The nonstoichiometric molar ratio of reagent is 1:2.2~1:4, reaction temperature is 25~80 DEG C.
5. the preparation method of according to claim 4 pair of fluorine sulfimide lithium, it is characterised in that:Step 2) described in tertiary amine Including at least one of triethylamine, tripropyl amine (TPA), tri-n-butylamine, diisopropyl ethyl amine, pyridine, picoline, imidazoles.
6. the preparation method of according to claim 1 pair of fluorine sulfimide lithium, it is characterised in that:Step 3) described in acidity Resin is the highly acidic resin of sulfonic acid type or the weakly acidic resin of carboxylic acid type.
7. the preparation method of according to claim 1 pair of fluorine sulfimide lithium, it is characterised in that:Step 4) described in it is weak Polar solvent is dichloromethane, chloroform, n-hexane, hexamethylene, toluene, dimethylbenzene, chlorobenzene, fluorobenzene.
8. the preparation method of according to claim 7 pair of fluorine sulfimide lithium, it is characterised in that:Step 4) described in depressurize Dry temperature is 60~120 DEG C.
9. the preparation method of according to claim 1 pair of fluorine sulfimide lithium, it is characterised in that:Step 5) described in pole Property solvent be dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, ethyl acetate, propyl acetate, butyl acetate, propyl propionate, Acetonitrile, propionitrile, acetone, tetrahydrofuran, ether, methyl tertiary butyl ether(MTBE), propyl ether, butyl ether, glycol dimethyl ether.
10. the preparation method of according to claim 8 pair of fluorine sulfimide lithium, it is characterised in that:Step 5) described in Weak polar solvent is dichloromethane, chloroform, n-hexane, hexamethylene, toluene, dimethylbenzene, chlorobenzene, fluorobenzene.
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CN108975292A (en) * 2018-09-17 2018-12-11 九江天赐高新材料有限公司 A kind of preparation method of double fluorine sulfonyl imide compounds
CN109734061A (en) * 2019-02-14 2019-05-10 湖南福邦新材料有限公司 A kind of preparation method of double fluorine sulfimide lithiums
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CN111591963A (en) * 2020-06-08 2020-08-28 苏州固锂新能源科技有限公司 Preparation method and purification process of fluorine-containing lithium sulfimide
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CN115611245B (en) * 2021-07-13 2024-02-02 湖南福邦新材料有限公司 Preparation method of dichloro sulfonyl imide acid and difluoro sulfonyl imide lithium
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CN114348978A (en) * 2022-01-29 2022-04-15 宁德时代新能源科技股份有限公司 Lithium bis (fluorosulfonyl) imide, preparation method thereof, electrolyte and secondary battery
CN114368733A (en) * 2022-01-29 2022-04-19 宁德时代新能源科技股份有限公司 Lithium bis (fluorosulfonyl) imide, preparation method thereof, electrolyte and secondary battery
CN114805290A (en) * 2022-05-12 2022-07-29 常德市大度新材料有限公司 Preparation method of vinyl sulfate
CN114873571B (en) * 2022-06-28 2023-11-21 河南省氟基新材料科技有限公司 Preparation method of difluoro sulfonyl imide salt
CN114873571A (en) * 2022-06-28 2022-08-09 河南省氟基新材料科技有限公司 Preparation method of bis (fluorosulfonyl) imide salt
CN115448267B (en) * 2022-09-19 2023-04-07 安徽新宸新材料有限公司 Method for preparing lithium bis (fluorosulfonyl) imide
CN115448267A (en) * 2022-09-19 2022-12-09 安徽新宸新材料有限公司 Method for preparing lithium bis (fluorosulfonyl) imide
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CN116409761A (en) * 2023-06-09 2023-07-11 山东海化集团有限公司 Preparation method of sodium bis (fluorosulfonyl) imide
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CN116812876A (en) * 2023-07-14 2023-09-29 河南省氟基新材料科技有限公司 Preparation method of sulfuryl fluoride

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