Patent ID: 6410190
Filing Date: 2002-06-25
Classification: C07C,H01M,Y02E

Abstract:
A process comprising:reacting a starting methanide of formula (I) MC(SO2(CxF2x+1))3â€ƒâ€ƒ(I) in whichx is 1, 2, 3, 4, 5, 6, 7 or 8, and M is H, Li, Na, K, Rb, Cs, Mg1/2, Ca1/2, Sr1/2 or Ba1/2, with concentrated sulfuric acid to form a free acid of the methanide, subjecting the free acid of the methanide to fractional rectification, reacting the fractionally rectified free acid of the methanide with phosphorus pentoxide to form a reaction product, subjecting the reaction product to fractional rectification, and reacting the fractionally rectified reaction product with metallic Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, chlorides or hydrides thereof, or alkyllithium, in an aprotic solvent to form a corresponding high purity metal methanide of the formula (I) in a solution.