PROCESS FOR PREPARING NITROMETHANE Russian patent published in 1995 - IPC

FIELD: as semiproducts in the chemical and pharmaceutical industries. SUBSTANCE: the product: methane, the yield is 58.5% the purity is 99.5% Reagent 1: dimethylsulfate. Reagent 2: sodium nitrite. Reaction conditions: in a continuously operating cascade of four reactors from 40 C in the first reactor to 115 C in the last reactor to the desired product by azeotropic distillation isolate at a pH of 5-7 followed by separation of the distillate, recycling of water and utilization of the stillage residue. EFFECT: more efficient preparation process. 14 cl, 1 dwg, 1 tbl