WO2018066896A3 - Method for preparing lithium difluorophosphate - Google Patents

Method for preparing lithium difluorophosphate Download PDF

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Publication number
WO2018066896A3
WO2018066896A3 PCT/KR2017/010853 KR2017010853W WO2018066896A3 WO 2018066896 A3 WO2018066896 A3 WO 2018066896A3 KR 2017010853 W KR2017010853 W KR 2017010853W WO 2018066896 A3 WO2018066896 A3 WO 2018066896A3
Authority
WO
WIPO (PCT)
Prior art keywords
lithium difluorophosphate
purity
present
lithium
yield
Prior art date
Application number
PCT/KR2017/010853
Other languages
French (fr)
Korean (ko)
Other versions
WO2018066896A2 (en
Inventor
임광민
Original Assignee
임광민
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020160129043A external-priority patent/KR101739936B1/en
Priority claimed from KR1020170021009A external-priority patent/KR101898803B1/en
Application filed by 임광민 filed Critical 임광민
Publication of WO2018066896A2 publication Critical patent/WO2018066896A2/en
Publication of WO2018066896A3 publication Critical patent/WO2018066896A3/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/30—Alkali metal phosphates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/455—Phosphates containing halogen
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D15/00—Lithium compounds
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/08—Compounds having one or more C—Si linkages
    • C07F7/12—Organo silicon halides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)

Abstract

The present invention relates to a method for preparing lithium difluorophosphate, and more specifically, a method for preparing lithium difluorophsphate, which enables simple and economical preparation of lithium difluorophosphate, which is a lithium salt used in an electrolyte for a lithium secondary battery, at high purity and high yield without a dangerous process. By using an organic silyl halide mixture rather than expensive siloxane which has been used for preparing lithium difluorophosphate, the method for preparing lithium difluorophosphate, according to the present invention, is economical, enables obtaining of high-purity lithium difluorophosphate having low amounts of various impurities, and ensures safety due to low corrosiveness during a process. In addition, the present invention enables preparation of high-yield and high-purity lithium difluorophosphate by means of a simple process without particular refinement, whereas in existing preparation methods, inevitable byproducts such as chloride or insoluble matters are generated and thus impurities should be removed by means of an extra process. Further, by reacting a bis(chlorosulfonyl)amine compound, which is a starting material, with water (H2O) and organic silyl halide, the present invention can solve the problems in the prior art and enables simple and economical preparation of high-purity and high-yield lithium difluorophosphate without a dangerous process.
PCT/KR2017/010853 2016-10-06 2017-09-28 Method for preparing lithium difluorophosphate WO2018066896A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2016-0129043 2016-10-06
KR1020160129043A KR101739936B1 (en) 2016-10-06 2016-10-06 Novel method for preparing lithium difluorophosphate
KR1020170021009A KR101898803B1 (en) 2017-02-16 2017-02-16 Preparing method of lithium difluorophosphate
KR10-2017-0021009 2017-02-16

Publications (2)

Publication Number Publication Date
WO2018066896A2 WO2018066896A2 (en) 2018-04-12
WO2018066896A3 true WO2018066896A3 (en) 2018-08-09

Family

ID=61831072

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2017/010853 WO2018066896A2 (en) 2016-10-06 2017-09-28 Method for preparing lithium difluorophosphate

Country Status (1)

Country Link
WO (1) WO2018066896A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108793118B (en) * 2018-08-13 2020-01-14 合肥天徽新材料有限公司 Production device and production method of lithium difluorophosphate
CN111224164B (en) * 2019-12-13 2022-07-15 九江天赐高新材料有限公司 Preparation method of lithium difluorophosphate
CN114634170A (en) * 2020-12-15 2022-06-17 江苏国泰超威新材料有限公司 Preparation method of lithium difluorophosphate
CN115215316B (en) * 2021-04-15 2023-09-15 浙江省化工研究院有限公司 Preparation method of lithium difluorophosphate
CN115321510A (en) * 2022-08-30 2022-11-11 珠海正杏新材料科技有限公司 Preparation method of lithium difluorophosphate
CN116443843A (en) * 2023-05-06 2023-07-18 珠海市赛纬电子材料股份有限公司 Waste electrolyte recovery method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070031238A (en) * 2005-09-14 2007-03-19 신에쓰 가가꾸 고교 가부시끼가이샤 Cyclic Carbonate-Modified Siloxane, Process for Producing the Same, Non-Aqueous Electrolytic Solution, Secondary Battery and Capacitor
KR20090118117A (en) * 2007-03-12 2009-11-17 샌트랄 글래스 컴퍼니 리미티드 Method for producing lithium difluorophosphate and nonaqueous electrolyte battery using the same
WO2012016924A1 (en) * 2010-08-04 2012-02-09 Solvay Sa Manufacture of lipo2f2 from pof3 or pf5
JP2013056829A (en) * 2006-08-22 2013-03-28 Mitsubishi Chemicals Corp Method for producing lithium difluorophosphate, method for producing nonaqueous electrolyte, nonaqueous electrolyte, and nonaqueous electrolyte secondary battery employing the nonaqueous electrolyte
EP2939978A1 (en) * 2013-06-07 2015-11-04 Stella Chemifa Corporation Method for producing difluorophosphate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070031238A (en) * 2005-09-14 2007-03-19 신에쓰 가가꾸 고교 가부시끼가이샤 Cyclic Carbonate-Modified Siloxane, Process for Producing the Same, Non-Aqueous Electrolytic Solution, Secondary Battery and Capacitor
JP2013056829A (en) * 2006-08-22 2013-03-28 Mitsubishi Chemicals Corp Method for producing lithium difluorophosphate, method for producing nonaqueous electrolyte, nonaqueous electrolyte, and nonaqueous electrolyte secondary battery employing the nonaqueous electrolyte
KR20090118117A (en) * 2007-03-12 2009-11-17 샌트랄 글래스 컴퍼니 리미티드 Method for producing lithium difluorophosphate and nonaqueous electrolyte battery using the same
WO2012016924A1 (en) * 2010-08-04 2012-02-09 Solvay Sa Manufacture of lipo2f2 from pof3 or pf5
EP2939978A1 (en) * 2013-06-07 2015-11-04 Stella Chemifa Corporation Method for producing difluorophosphate

Also Published As

Publication number Publication date
WO2018066896A2 (en) 2018-04-12

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