FIELD: chemistry.
SUBSTANCE: invention relates to a method for chemical processing of mixtures of gaseous C1-C6 hydrocarbons (alkanes) into C2-C3 olefins (ethylene and propylene), involving oxidative condensation of methane and pyrolysis of C2-C6 alkanes, characterised by that oxidative pyrolysis of C2-C6 alkanes is carried out at temperature 450°C-850°C, pressure 1-40 atm and while feeding not more than 15 vol. % oxygen in the presence of oxide catalysts without preliminary splitting of the initial mixture of gaseous C1-C6 hydrocarbons (alkanes) into components and/or separation of methane; oxidative condensation of methane takes place in a stream of methane separated from products of oxidative pyrolysis of C2-C6 alkanes, in the presence of oxide catalysts at temperature 700°C-950°C, pressure 1-10 atm and molar ratio of methane to oxygen ranging from 2:1 to 10:1, wherein extraction of products of oxidative condensation of methane is carried out collectively or partly collectively with extraction of products of oxidative pyrolysis of C2-C6 alkanes, and methane, ethane and C3+ alkanes separated from reaction gases are recycled and redirected to the methane oxidative condensation and C2-C6 alkane pyrolysis steps, respectively.
EFFECT: method ensures high degree of conversion of the starting material, enables to reduce power consumption on extraction of the desired products, and reduces metal consumption of the equipment per unit product.
8 cl, 2 dwg
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