PERFLUOROBUTANE SULFONYL FLUORIDE, POTASSIUM PERFLUOROBUTANE SULFONATE SALT, AND METHOD FOR PRODUCING PERFLUOROBUTANE SULFONYL FLUORIDE

摘要

This perfluorobutane sulfonyl fluoride has a perfluorosulfolane content of 100 ppm or less on a mass basis. This potassium perfluorobutane sulfonate salt has a potassium 1,1,2,2,3,3,4,4-octafluorobutane sulfonate salt content of 100 ppm or less on a mass basis. In this method for producing perfluorobutane sulfonyl fluoride, perfluorosulfolane is removed by adding an aqueous solution of an alkali metal hydroxide into the perfluorobutane sulfonyl fluoride.