FIELD: industrial organic synthesis. SUBSTANCE: mixture of p- and m-xylenes obtained by rectification of petroleumorigin xylenes is subjected to isomerization under conditions ensuring conversion of mixture into product, which is separated from reaction mixture and by-products (C1-C7-hydrocarbons) and remaining mixture, after mixing with initial raw material, is transferred to rectification stage in the beginning of process. EFFECT: reduced power consumption and increased yield of o-xylene. 6 cl, 1 dwg, 1 tbl
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