HIGH-OCTANE PRODUCTS PRODUCTION PROCESS Russian patent published in 2002 - IPC

FIELD: petrochemical processes. SUBSTANCE: tert-alkene(s) and alcohol(s) are made interact in presence of heterogeneous catalyst(s). At last part of unreacted hydrocarbon(s) is (are) then separated from high-octane product by rectification, and cooled stream(s) containing alkyl tert-alkyl ether(s) and alcohol(s) is (are) recycled into reaction zone(s). Amounts and compositions of initial and recycled streams are controlled in such a way that, at the inlet of the first or sole reaction zone, concentration of alkyl tert-alkyl ether(s) is 5 to 60% but does not exceed concentration of tert-alkene(s) more than thrice, whereas concentration of alcohol(s) ranges between 7 and 25%. Amount of alcohol(s) fed into reaction zone(s) together with initial stream(s) and stream(s) recycled from subsequent rectification zone does not exceed summary amount of alcohol(s) consumed in reaction and withdrawn in rectification distillate or side stream more than by 5% and preferably no more than by 1%. EFFECT: increased conversion of tert-alkenes. 14 cl, 3 dwg, 12 ex