FIELD: laboratory distillation, oil, chemical, alcohol and food-processing industries. SUBSTANCE: dephlegmator realizes principle of partial condensation; this includes double-tube heat exchanger with tubes for supply and discharge of cooling water and vapor-delivery tube; it is additionally provided with movable bush adjoining inner surface of inner tube of heat exchanger and outer surface of vapor-delivery tube; it is sealed-up by these surfaces. Dephlegmator is also provided with condenser fitted with tube for taking distillate; condenser is made in form of circular cavity formed by outer tube of heat exchanger and additional external casing connected with working space of dephlegmator and with upper portion of rectifying column through vapor-delivery tube which is located inside inner tube of heat exchanger and is provided with cartridge filled with loose dispersed agent saturated with volatile admixtures. EFFECT: reduced usage of materials; low cost; possibility of saturating distillate with required admixtures. 7 cl, 1 dwg
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