METHOD OF PRODUCING TERT-PENTENE(S) AND ALKYL C-C-TERT-PENTYL ETHER Russian patent published in 2011 - IPC C07C11/00 C07C1/20 C07C43/04 C07C41/06 

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