POTASSIUM PERFLUOROALKANESULFONATES AND PROCESS FOR PRODUCTION THEREOF

Title:

POTASSIUM PERFLUOROALKANESULFONATES AND PROCESS FOR PRODUCTION THEREOF

Document Type and Number:

WIPO Patent Application WO/2007/037411

Kind Code:

A1

Abstract:

A process for the production of potassium perfluoroalkane- sulfonates which comprises the electrolytic fluorination step of electrofluorinating an alkanesulfonyl halide in anhydrous hydrofluoric acid to obtain a gas containing a perfluoro- alkanesulfonyl fluoride as the main component. The process may further comprise the gas absorption step of reacting the gas with an aqueous solution of potassium hydroxide to form a solution containing a potassium perfluoroalkanesulfonate, the purification step of removing contaminant potassium fluoride, potassium hydroxide and potassium sulfate from the solution, and the concentration/recovery step of subjecting the purified aqueous solution to concentration and drying. In the electrolytic fluorination, the formation of by-products can be inhibited by keeping the proton concentration of the electrolytic solution within the range of 150 to 1500ppm.

Inventors:

UOTANI MASAKAZU (JP)
YATSUYANAGI HIROYUKI (JP)
HONDA TSUNETOSHI (JP)

Application Number:

PCT/JP2006/319545

Publication Date:

April 05, 2007

Filing Date:

September 29, 2006

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MITSUBISHI MATERIALS CORP (JP)
JEMCO INC (JP)
UOTANI MASAKAZU (JP)
YATSUYANAGI HIROYUKI (JP)
HONDA TSUNETOSHI (JP)

International Classes:

C07C303/32; C07C309/06; C25B3/28

Foreign References:

JPS6461452A	1989-03-08
JPH01268671A	1989-10-26
JPS505325A	1975-01-21
JP2005288008A	2005-10-20
US2732398A	1956-01-24
JPS6461452A	1989-03-08
JP3294323B2	2002-06-24

Other References: