| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing a high-purity barium alkanedisulfonate at high yield. <P>SOLUTION: The method for producing the barium alkanedisulfonate represented by formula (3) includes a process 1 of reacting a dihaloalkane compound and sodium sulfite and/or potassium sulfite in a reaction solvent to obtain a reaction liquid containing an alkanedisulfonate represented by formula (2), and a process 2 of adding an acid to the reaction liquid and then adding a barium salt to react. In the formulae (2) and (3), R<SP POS="POST">1</SP>and R<SP POS="POST">2</SP>are each H, 1-5C alkyl, 1-5C alkoxy, 1-5C fluoroalkyl or 1-5C polyfluoroalkyl; n is an integer of 1 to 6, and when n is 2 to 6, R<SP POS="POST">1</SP>s and R<SP POS="POST">2</SP>s of respective n-pieces may be the same or different; and M is Na or K. <P>COPYRIGHT: (C)2013,JPO&INPIT |
