FIELD: petrochemical processes. SUBSTANCE: light olefins are obtained from gaseous hydrocarbon stream by way of combining steam reforming with preparing oxygen-containing compounds and converting them into olefins. In this process, crude methanol stream, obtained in the stage of production of oxygen-containing compounds and containing, along with methanol, light fraction and higher alcohols, is passed through zone wherein oxygen-containing compounds are converted. At last a part of by- product is recycled to provide reforming water. Another part of by-product can be combined with propylene stream to yield high-octane gasoline component. Propylene and butylene fractions are additionally converted into high-octane ether and other worthy products. EFFECT: eliminated costly stages of isolation and purification of methanol leading to total reduction of production expenses. 12 cl, 3 dwg, 4 tbl, 6 ex
