METHOD OF PURIFICATION OF FLUOROMETHYL-1,1,1,3,3,3-HEXAFLUORO- -ISOPROPYL ESTER Russian patent published in 1998 - IPC

FIELD: chemical technology. SUBSTANCE: method involves addition of substance taken from the group involving alkaline metal hydroxides and also hydrophosphates, phosphates, hydrocarbonates, borates or sulfites or alkaline metal and acetic, phthalic or boric acid salts to fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ester followed by its rectification. Invention ensures to suppress effectively decomposition of fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ester in the process of rectification which is used as a pharmaceutical inhalatory anesthetic agent. EFFECT: improved method of purification, enhanced purity of 1,1,1,3,3,3-hexafluoroisopropyl ester. 4 cl, 2 tbl