METHOD FOR PRODUCTION OF BIS(TRIFLUOROMETHANE SULFONYL)IMIDE Russian patent published in 1998 - IPC

FIELD: production of bis(trifluoromethane sulfonyl)imide being used as strong NH-acid which is used for production of salts, particularly, for production of lithium salt which is useful in lithium chemical current source. SUBSTANCE: trifluoromethanesulfone amide as its mixture with hexamethyl silazane is affected by boiling, thus trifluoromethanesulfone amide is converted into N(trimethylsilyl)trifluoromethanesulfone amide. The latter product is metallized with metallic sodium, the process is carried out in tetrahydrofurane. Thus obtained sodium salt of bis(tifluoromethane sulfonyl)imide is treated by concentrated sulfuric acid. EFFECT: simplified control of individual stages of the process; decreased expense of reagents; excluded usage of methanol being strong-acting poison. 3 cl