METHOD FOR PRODUCTION OF HIGH-ANTIKNOCK BLENDS Russian patent published in 2002 - IPC

FIELD: petrochemical processes. SUBSTANCE: alkenes having 3-5 carbon atoms are subjected to dimerization or trimerization in reaction zone(s) containing acid cationite(s) at elevated temperatures in presence of small quantities of water and/or alcohol(s), followed by rectification separation of major part of unreacted C3- C4-hydrocarbons from high-antiknock blend. In the rectification vat following after reaction zone(s), such concentration of unreacted hydrocarbons and/or alcohol(s), and/or ether(s) in mixture with alkene dimmers and trimers is maintained that vat temperature does not exceed 165 C, and preferably does not exceed 125 C. EFFECT: decreased tar formation. 12 cl, 3 dwg, 9 ex