METHOD OF PROCESSING ALCOHOL PRODUCTION WASTES Russian patent published in 2012 - IPC C07C31/08 C07C29/74 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of processing alcohol production wastes: concentrate of head impurities of ethyl alcohol (CHI) and an intermediate fraction of ethyl alcohol (IFEA). The method involves obtaining a water-alcohol solution of CHI or IFEA with density (0.837-0.940) g/cm³ (I) and conducting continuous extraction of impurities (C₃-C₅ alcohols, esters, carbonyl compounds) in a packed column with a mixture of aromatic hydrocarbons (II) or a mixture of aromatic and aliphatic hydrocarbons (III) with ratio of volume flow I: II or, respectively, I : III, equal to 1:(1-4) (preferably 1:1.2). To intensify mass exchange into solution (I), (0.1-0.5) wt % mixture (IV) of anionic alkyl sulphates and noionic oxyethylated alkyl phenols in ratio (25-20):(70-75) wt% (IV). The desired processing products: raffinate - aqueous of ethanol with weight ratio of the latter equal to (80-20) wt % can be used to obtain high-purity edible ethyl alcohol and as an anti-icing agent for glass used on cars, and extract - solution of alcohol and esters in a mixture of hydrocarbons is used to prepare mixed solvents for the paint industry.

EFFECT: high efficiency of the method of processing alcohol production wastes.

4 cl, 8 ex, 1 tbl, 2 dwg