METHOD FOR PREPARING MOTOR FUELS

FIELD: petroleum chemistry. ^ SUBSTANCE: method involves preparing synthesis gas, catalytic conversion of synthesis gas in reactor for synthesis of dimethyl ether (DME) at enhanced temperature and pressure wherein synthesis gas is contacted with catalyst followed by cooling the gaseous mixture and its separation for liquid and gaseous phases. Dimethyl ether is isolated from the liquid phase that is fed into catalytic reactor for synthesis of gasoline and the gaseous phase containing unreacted components of synthesis gas is fed to repeated catalytic conversion into additional reactor for synthesis of DME being without the parent synthesis gas. Residue of gaseous phase containing components of synthesis gas not reacted to DME after repeated catalytic conversion in additional reactor for synthesis of DME are oxidized in reactor for synthesis of carbon dioxide. Then carbon dioxide is separated and mixed its with natural gas at increased temperature and pressure that results to preparing synthesis gas that is fed to the catalytic conversion into reactor for synthesis of DME. Invention provides increasing yield of gasoline fraction and decrease of carbon dioxide waste in atmosphere. ^ EFFECT: improved method of synthesis. ^ 4 cl, 1 tbl, 1 dwg, 1 ex