FIELD: organic chemistry. SUBSTANCE: hydrocarbon stream which contents isobutane is affected by dehydrogenation, the process is followed by separation. Thus prepared isobutene-isobutane fraction interacts with alcohol to prepare product contenting alkyl-tert-butyl ether. Mentioned above separation is carried out with the help of solvent. Alkyl-tert-butyl ether and/or portion of alcohol being used in the process are proposed as said solvent. EFFECT: improved efficiency of the method. 10 cl, 7 dwg
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