| 摘要 |
FIELD: chemistry.SUBSTANCE: method includes distillation of wash in distillation column, epuration of wash distillate with application of hydroselection in epuration column, which has two dephlemators, rectification of epurate, purification of rectified alcohol from methanol and main admixtures in final purification column and column of concentration of methanol and main admixtures. Additional purification of alcohol from said admixtures is carried out in column of preliminary purification, which is fed and heated with water-alcohol vapour from wash section of distillation column dephlagmator and fed with vapour condensate from condenser of carbon dioxide separator. Water-alcohol vapour from upper plate of lower zone of its concentrated part is partially condensed in first epuration column dephlagmator. Partial condensation of vapour from still-head pipe of said column is carried out in first section of second dephlagmator, formed phlegm is returned to upper plate of said column. Enriched with ethyl alcohol and admixtures non-condensed vapour is diluted with purified water vapour and supplied into second section of second dephlagmator, where main and intermediate admixtures are concentrated and removed from wash-rectification system.EFFECT: invention makes it possible to increase organoleptic properties of rectified alcohol and increase its output.1 tbl, 1 dwg |
