| 摘要 |
PURPOSE: A refining method for an methanide electrolyte is provided to easily and economically obtain the various organic methanide electrolyte having high purity to be used for a battery electrolyte, by manufacturing specific methanide having high purity and suitable for the electrolyte by refining it. CONSTITUTION: The methanide suitable for an electrolyte is expressed by the formula (x is one of integers from 1 through 8, M is H, Li, Na, KRb, Cs, Mg1/2, Ca1/2, Sr1/2 or Ba1/2). The manufacturing method for methanide electrolyte has a stage 1 to fractionally rectify free acid obtained by reacting the methanide expressed by the formula with concentrated sulfuric acid, a stage 2 to fractionally rectify the product expressed in the formula with H instead of M and obtained in the stage 1 by reacting it with phosphorous pentaoxide at a temperature of not less than its fusing point. The product from the stage 2 is taken into non-protic organic solvent, and is reacted with a metal such as Li and the like, their chlorides or hydrides, or if M is Li, it is reacted with alkyl-lithium, and a metal methanide corresponding to the formula is formed. |
