FIELD: chemistry.;SUBSTANCE: invention relates to a method of producing tert-pentene(s) and/or alkyl C1-C2-tert-pentyl ether from mixtures of mainly C5-hydrocarbons, containing at least tert-pentenes, isopentane and an admixture of pentadiene(s), and C1-C2 alcohol, involving reaction of tert-pentene(s) with C1-C2 alcohol on a solid acid catalyst and extraction of products via rectification, characterised by that at least catalysed isomerisation of 2-methyl-1-butene into 2-methyl-2-butene [possibly in the presence of hydrogen] is carried out in the initial mixture, the formed mixture undergoes rectification and distillate is output, said distillate mainly containing isopentane, and a stillage residue mainly containing 2-methyl-2-butene, a portion of which preferably undergoes catalysed reaction with C1-C2 alcohol in ether synthesis zone(s), distillate is distilled out of the formed mixture, said distillate containing a mixture of unreacted C5-hydrocarbons with alcohol, which is further used to obtain ether(s), preferably by returning to the ether synthesis zone, and the stillage residue is output, said stillage residue containing alkyl C1-C2-tert-pentyl ether, which is collected as the product and/or undergoes catalysed decomposition and a mixture of pure tert-pentenes is extracted via rectification and removal of alcohol.;EFFECT: disclosed method virtually avoids the need to extract alcohol from mixtures with hydrocarbons and extraction thereof from the extract, where the need for basic equipment is at least twice less compared to existing methods.;9 cl, 2 tbl, 6 ex, 3 dwg
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