Title:
METHOD FOR PRODUCING DIFLUOROPHOSPHATE
Document Type and Number:
WIPO Patent Application WO/2014/196627
Kind Code:
A1
Abstract:
Provided is a method for producing difluorophosphate which is capable of producing difluorophosphate of high purity easily and industrially advantageously. The present invention comprises: a step of reacting an anhydrous hydrofluoric acid that does not contain an organic solvent with an oxoacid, etc. of phosphorus to form a fluorophosphate solution; a step of forming difluorophosphate in the fluorophosphate solution by adding hexafluorophosphate to the fluorophosphate solution in the absence of a halide, carbonate, borate, phosphate, hydroxide and oxide of alkali metal, etc.; and either a step of heating and drying the fluorophosphate solution containing the difluorophosphate to distill off fluorophosphate, or a step of precipitating the difluorophosphate in the fluorophosphate solution by crystallization, then separating the liquid and solid portions of the difluorophosphate, and further distilling off the fluorophosphate contained in the difluorophosphate after the liquid/solid separation.
Inventors:
YAHATA NAOKI (JP)
NISHIDA TETSUO (JP)
MINAMIGAWA SHUICHI (JP)
NISHIDA TETSUO (JP)
MINAMIGAWA SHUICHI (JP)
Application Number:
PCT/JP2014/065086
Publication Date:
December 11, 2014
Filing Date:
June 06, 2014
Export Citation:
Assignee:
STELLA CHEMIFA CORP (JP)
International Classes:
C01B25/455; H01G11/62; H01M10/0567; H01M10/0568
Foreign References:
| JP2010155774A | 2010-07-15 | |||
| JP2012051752A | 2012-03-15 | |||
| DE813848C | 1951-09-17 | |||
| JP2005053727A | 2005-03-03 | |||
| JP2005219994A | 2005-08-18 | |||
| JP2005306619A | 2005-11-04 | |||
| JP2006143572A | 2006-06-08 | |||
| JP2010155774A | 2010-07-15 | |||
| JP2010155773A | 2010-07-15 | |||
| JP2012051752A | 2012-03-15 | |||
| JP3439085B2 | 2003-08-25 |
Other References:
W.LANGE ET AL.: "Studies of Fluorophosphoric Acids and Their Derivatives. XIII. Preparation of Anhydrous Monofluorophosphoric Acid", J.AM. CHEM.SOC., vol. 69, no. 5, 1 May 1947 (1947-05-01), pages 1073 - 1076
See also references of EP 2939978A4
K. MATSUMOTO; R. HAGIWARA, INORGANIC CHEMISTRY, vol. 48, 2009, pages 7350 - 7358
THE ELECTROCHEMICAL SOCIETY OF JAPAN, 77TH CONFERENCE, PROCEEDINGS, pages 1118
BER. DTSCH. CHEM., GES., vol. B26, 1929, pages 786
ZH. NEORGAN. KHIM., vol. 7, 1962, pages 1313 - 1315
JOURNAL OF FLUORINE CHEMISTRY, vol. 38, 1988, pages 297 - 302
THE JAPAN SOCIETY FOR ANALYTICAL CHEMISTRY, 43TH ANNUAL CONVENTION, SUMMARIES, 1994, pages 536
INORGANIC NUCLEAR CHEMISTRY LETTERS, vol. 5, 1969, pages 581 - 585
See also references of EP 2939978A4
K. MATSUMOTO; R. HAGIWARA, INORGANIC CHEMISTRY, vol. 48, 2009, pages 7350 - 7358
THE ELECTROCHEMICAL SOCIETY OF JAPAN, 77TH CONFERENCE, PROCEEDINGS, pages 1118
BER. DTSCH. CHEM., GES., vol. B26, 1929, pages 786
ZH. NEORGAN. KHIM., vol. 7, 1962, pages 1313 - 1315
JOURNAL OF FLUORINE CHEMISTRY, vol. 38, 1988, pages 297 - 302
THE JAPAN SOCIETY FOR ANALYTICAL CHEMISTRY, 43TH ANNUAL CONVENTION, SUMMARIES, 1994, pages 536
INORGANIC NUCLEAR CHEMISTRY LETTERS, vol. 5, 1969, pages 581 - 585
Attorney, Agent or Firm:
KOYAMA YASUSHI (JP)
Hill 靖 (JP)
Hill 靖 (JP)
Download PDF: