PROCEDURE FOR PRODUCTION OF HIGH-OCTANE MIXTURES CONTAINING ALKYL-TERT-ALKYL ETHERS Russian patent published in 2011 - IPC C10L1/02 C07C43/04 C07C41/06 C07C41/38 C07C41/44 

FIELD: gas and oil production.

SUBSTANCE: invention refers to procedure for production of high-octane mixtures containing alkyl-tert-alkyl ethers with implementation of at least interaction of tert-pentene in fraction containing mainly hydrocarbons C₅ and, possibly, hydrocarbons C₆ with alcohol(s) C₁-C₄ at presence of acidic solid catalyst(s) at 20-100°C rectification. The procedure consists of processing in two stages. At the first stage there is performed synthesis of mainly alkyl-tert-amyl ether with contacting fraction of hydrocarbons C₅ and partially C₆ with alcohol(s) C₁-C₄ distillation of distillate. At the second stage alcohol is recuperated from the said distillate, for which purpose distillate is subjected to additional contacting with at least the said catalyst(s) and also with hydrocarbon mixture including isobutene and/or tert-pentene at amount sufficient for transformation of major portion of alcohol into alkyl-tert-alkyl ether(s). In case of their utilisation C₄-hydrocarbons are removed from reaction mixture together with admixture of alcohol when limit of its concentration, allowed for benzene ingredients, is exceeded.

EFFECT: reduced power inputs due to improved recuperation of alcohol.

8 cl, 9 ex, 2 tbl, 3 dwg