PURIFICATION OF NITROETHANE BY AZEOTROPIC DISTILLATION WITH N-HEPTANE OR ISOOCTANE

摘要

1,219,738. Separation of nitroethane from other nitroalkanes. COMMERCIAL SOLVENTS CORP. 9 July, 1969 [26 Aug., 1968], No. 34621/69. Heading C2C. Nitroethane is separated from a mixture with one or more other nitroalkanes, including nitromethane and 2-nitropropane by (a) mixing the nitroalkane mixture with a saturated aliphatic hydrocarbon having 7 or 8 carbon atoms; (b) distilling the mixture to form a distillate consisting of an upper layer and a lower layer comprising nitroethane, nitromethane and the hydrocarbon; (c) returning the upper layer to the distillation step; and (d) redistilling the lower layer until separation of the nitromethane and the hydrocarbon has been effected, thereby producing, as a distillation residue, purified nitroethane. The aliphatic hydrocarbon is preferably n-heptane, 2,2,4-trimethylpentane or 2,3,4-trimethylpentane.