LEAD-FREE GASOLINE COMPOSITION Russian patent published in 2001 - IPC

FIELD: gasoline production. SUBSTANCE: invention, in particular, relates to lead-free gasoline compositions with octane numbers at least 76, which are used as motor-car and aviation gasolines. Composition contains fractions of linear and branched saturated C4-C12-hydrocarbons and/or petroleum-processing gasoline fractions, 1-25% of C6-C12-aromatic hydrocarbons, 1-25% of olefin hydrocarbon C4-C12- fractions, and 1-25% of (i) mixture of Mannich base with ether fraction obtained in the process of etherification with methanol of C4-C6- hydrocarbon fraction containing piperylene, isoamylenes, and isobutylene or (ii) mixture of Mannich base and methyl tert-butyl ether with fraction of ethers obtained in the process of etherification with methanol of isoamylene-piperylene-containing C5-hydrocarbon fraction. EFFECT: enabled preparation of high-antiknock chemically stable lead-free gasoline compositions from wide hydrocarbon fractions. 4 cl, 1 tbl