FIELD: industrial organic synthesis.
SUBSTANCE: process involves distillation of crude acetonitrile in first distillation column at subatmospheric pressure to produce acetonitrile-containing first side fraction, which is distilled on second distillation column at overatmospheric pressure to produce second side fraction containing crude acetonitrile.
EFFECT: reduced amount of polymerized hydrogen cyanide and clogging of top section of column.
10 cl, 1 dwg
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