TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The pressure of extractor (B1, B2) is atmospheric pressure to 10 MPa, preferably atmospheric pressure to 1 MPa.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The process further comprising adding the oxygenated compound or its mixture into the hydrocarbon phase; introducing the aqueous phase to the head column extraction and introducing the hydrocarbon phase to the base column extraction; introducing the refined mixture into a water treatment plant and/or recycling the extract containing the hydrocarbon phase enriched in alcohol and drying; cooling the extract by decomposing the aqueous phase and recycling in the extraction column. The extraction process takes place by circulating the two phases with counter-current in a device, which favors the dispersion; contacting and exchanging the mixture between the aqueous phase and the hydrocarbon phase. The alcohol or its mixture is obtained by fermenting biomass, preferably ethanol, butanol or a mixture of acetone-butanol-ethanol. The extraction step takes place at room temperature to 250 degrees C, preferably 50-150 degrees C. The oxygenated compound is introduced into the base column within the pipe for introducing the hydrocarbon phase. The oxygenated compound is introduced into the extraction column with an intermediate height and the counter-extract is introduced between the aqueous phase and hydrocarbon phase. The drying step of the base enriched in alcohol takes place adsorption on molecular sieve, preferably zeolite or silicon. The molecular sieve is placed in columns, which functions alternatively in an adsorption phase and regeneration or desorption phase. The adsorption step takes place in liquid phase. The drying step takes place by the adsorption process, during circulating the fuel base containing hydrocarbon in the drier, directly leaving its manufacturing process in a column filled with the adsorbent. The process further uses at least two columns functioning in regeneration mode and one column in the adsorption mode. The drying of the fuel base enriched in alcohol takes place by per-evaporation through membranes containing zeolite A or T, dense base membranes from hydrophilic polymers and base membranes from silica microporous. The obtained extract comprises the hydrocarbon phase enriched in alcohol or mixture of anhydrous alcohol, which is directly incorporated into the fuel pool. Preferred Components: The fuel is a gasoline, preferably fractional gasoline from reformats or fractional gasoline from pyrolysis, gas oil, preferably of type light cycle oil or fatty esters of animal or plant oils, or kerosene. The oxygenated compound is obtained from: ethers, preferably ethyl tert-butyl ether, methyl tert-butylether, tert-amylethylether, tert-amylmethylether, diisopropylether, ethers with 7 carbons, preferably 2-methyl-2-methoxypentane or 2,3-dimethyl-2-methoxybutane, n-propyl tert-butylether, isopropyl tert-butylether, dipropylether; or alcohols, preferably butanol, tert-butyl alcohol, isopropanol, iso-butyl alcohol and/or methanol. EXAMPLE - No suitable example given.