公开(公告)号：US20160075556A1

公开(公告)日：2016-03-17

申请号：US14418720

申请日：2014-06-06

Applicant: STELLA CHEMIFA CORPORATION

Inventor： Naoki Yahata ,  Tetsuo Nishida ,  Shuichi Minamigawa

IPC: C01B25/455

CPC classification number: C01B25/455 ,  H01G11/62 ,  H01M10/052 ,  H01M10/0568

Abstract: Provided is a method for producing a difluorophosphate, which can easily and industrially advantageously produce a high-purity difluorophosphate. The method includes a step of producing a difluorophosphate in the fluorophosphoric acid solution by reacting hydrofluoric acid anhydride containing no solvent with an oxoacid and/or the like of phosphorous to produce a fluorophosphoric acid solution; a step of adding a hexafluorophosphate to the fluorophosphoric acid solution in the absence of respective halides, carbonates, borates, phosphates, hydroxides, and oxides of an alkali metal and the like; and a step of heating and drying the fluorophosphoric acid solution containing the difluorophosphate to distill away a fluorophosphoric acid, or a step of depositing the difluorophosphate in the fluorophosphoric acid solution by crystallization, subsequently separating the difluorophosphate by solid-liquid separation, and distilling away a fluorophosphoric acid contained in the difluorophosphate after the solid-liquid separation.

Abstract translation: 本发明提供一种二氟磷酸盐的制造方法，其可以容易且工业上有利地生产高纯度二氟磷酸盐。 该方法包括通过使不含溶剂的氢氟酸与含磷酸和/或类似物质的磷反应来制备氟磷酸溶液中的二氟磷酸盐以产生氟磷酸溶液的步骤; 在不存在各种卤化物，碳酸盐，硼酸盐，磷酸盐，氢氧化物和碱金属的氧化物等的情况下，向氟磷酸溶液中加入六氟磷酸盐的步骤; 以及将含有二氟磷酸盐的氟磷酸溶液加热干燥以蒸馏出氟磷酸的步骤，或通过结晶在氟磷酸溶液中沉积二氟磷酸盐的步骤，随后通过固液分离分离二氟磷酸盐，并蒸馏除去 在固液分离后二氟磷酸盐中含有的氟磷酸。

公开(公告)号：US20160075557A1

公开(公告)日：2016-03-17

申请号：US14419181

申请日：2014-06-06

Applicant: STELLA CHEMIFA CORPORATION

Inventor： Naoki Yahata ,  Tetsuo Nishida

IPC: C01B25/455

CPC classification number: C01B25/455 ,  B01J31/0288 ,  C01P2006/80 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2300/0025

Abstract: Provided is a method for purifying a difluorophosphate, in which a difluorophosphate is purified to a high purity. The method includes a method for purifying a difluorophosphate, comprising bringing hydrogen fluoride into contact with a difluorophosphate containing an impurity and subsequently heating and drying the difluorophosphate, or bringing the hydrogen fluoride into contact with the difluorophosphate containing the impurity while heating and drying the difluorophosphate containing the impurity, thereby removing the impurity.

Abstract translation: 提供了一种纯化二氟磷酸盐以纯化至高纯度的二氟磷酸盐的方法。 该方法包括一种纯化二氟磷酸盐的方法，包括使氟化氢与含有杂质的二氟磷酸盐接触，随后加热和干燥二氟磷酸盐，或使氟化氢与含有杂质的二氟磷酸盐接触，同时加热和干燥含二氟磷酸盐 杂质，从而除去杂质。

公开(公告)号：US10112835B2

公开(公告)日：2018-10-30

申请号：US14419181

申请日：2014-06-06

Applicant: STELLA CHEMIFA CORPORATION

Inventor： Naoki Yahata ,  Tetsuo Nishida

IPC: C01B25/455 ,  B01J31/02 ,  H01M10/0567 ,  H01M10/0525

Abstract: Provided is a method for purifying a difluorophosphate, in which a difluorophosphate is purified to a high purity. The method includes a method for purifying a difluorophosphate, comprising bringing hydrogen fluoride into contact with a difluorophosphate containing an impurity and subsequently heating and drying the difluorophosphate, or bringing the hydrogen fluoride into contact with the difluorophosphate containing the impurity while heating and drying the difluorophosphate containing the impurity, thereby removing the impurity.

公开(公告)号：US09624107B2

公开(公告)日：2017-04-18

申请号：US14418720

申请日：2014-06-06

Applicant: STELLA CHEMIFA CORPORATION

Inventor： Naoki Yahata ,  Tetsuo Nishida ,  Shuichi Minamigawa

IPC: C01B25/455 ,  H01G11/62 ,  H01M10/0568 ,  H01M10/052

CPC classification number: C01B25/455 ,  H01G11/62 ,  H01M10/052 ,  H01M10/0568

Abstract: Provided is a method for producing a difluorophosphate, which can easily and industrially advantageously produce a high-purity difluorophosphate. The method includes a step of producing a difluorophosphate in the fluorophosphoric acid solution by reacting hydrofluoric acid anhydride containing no solvent with an oxoacid and/or the like of phosphorous to produce a fluorophosphoric acid solution; a step of adding a hexafluorophosphate to the fluorophosphoric acid solution in the absence of respective halides, carbonates, borates, phosphates, hydroxides, and oxides of an alkali metal and the like; and a step of heating and drying the fluorophosphoric acid solution containing the difluorophosphate to distill away a fluorophosphoric acid, or a step of depositing the difluorophosphate in the fluorophosphoric acid solution by crystallization, subsequently separating the difluorophosphate by solid-liquid separation, and distilling away a fluorophosphoric acid contained in the difluorophosphate after the solid-liquid separation.