METHOD OF PREPARING LOWER OLEFINS, REACTOR FOR PYROLYSIS OF HYDROCARBONS, AND APPARATUS FOR HARDENING PYROLYSIS GASES Russian patent published in 1998 - IPC

FIELD: chemical industry. SUBSTANCE: method of preparing lower olefins by pyrolysis of hydrocarbons comprises preheating and evaporating initial feedstock, mixing it with vapor diluent, thermally pyrolysing it in reactor, cooling pyrolysis gases and subsequently separating them. In this case, thermal pyrolysis requires using reactor in the form of blade machine the working body of which are pyrolysis gases. The claimed method makes it possible to increase yield of lower olefins due to decreasing yields of methane-hydrogen fraction and resins which are heavy pyrolysis products. EFFECT: more efficient preparation method. 9 cl, 3 dwg, 1 tbl