FIELD: processing hydrocarbons by low-temperature rectification; oil and gas industries. SUBSTANCE: proposed method is based on low- temperature rectification including compression of hydrocarbon raw material, cooling this material at separation of moisture, separation in rectifying stripping tower into the plus product and condensate, delivery of the plus product for cooling in propane evaporator at adjustable delivery of cooling agent, separation of cooled plus product in reflux reservoir obtaining gas phase and phlegm directed to rectifying stripping tower for sprinkling. Control of delivery of cooling agent to propane evaporator is effected by temperature of cooled plus product escaping from it according to amount of phlegm directed for sprinkling. EFFECT: avoidance of flooding of tower; enhanced efficiency; considerable increase of content of hydrocarbons C3-C4 in condensate. 1 dwg
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