METHYL CHLORIDE SYNTHESIS METHOD Russian patent published in 2010 - IPC C07C19/03 C07C17/16 

FIELD: chemistry.

SUBSTANCE: methyl chloride synthesis method involves reacting methanol with hydrogen chloride in a synthesis reactor to obtain a vapour-gas mixture containing methyl chloride, and extraction of methyl chloride from vapour-gas mixture via partial condensation, followed by washing with initial methanol which is then fed into the synthesis reactor, and distillation purification where methyl chloride is extracted in form of a distillate. The initial methanol is fed into the system in three streams, wherein a stream A is fed for washing, stream B is fed for distillation purification and the remaining stream C is fed directly into the synthesis reactor. The ratio of stream A to the overall stream (A+B+C) of the initial methanol is between 0.1 and 0.5; the ratio of stream B is between 0.3 and 0.7; the ratio of stream C is between 0.05 and 0.5.

EFFECT: highly efficient process owing to avoiding recycling the desired product into the synthesis reactor.

5 cl, 1 dwg, 2 ex