FIELD: chemistry.
SUBSTANCE: invention relates to two versions of a method of converting a stream of material which contains oxygenate with 1-10 carbon atoms, in the reaction zone of a fluidised layer. One of the versions involves conversion in the zone of a fluidised layer, which includes a reactor with a circulating fluidised catalyst layer in conversion conditions in the presence of a catalyst for obtaining a stream of a product which contains light olefins, in which one or more inner surfaces of the reaction zone has a protective layer which is more resistant to metal-catalysed coking than a steel alloyed surface, where the protective layer contains one or more elements from a group comprising tin, chromium, antimony, aluminium, germanium and silicon.
EFFECT: use of the present method solves the problem of protecting surfaces of the reaction zone from metal-catalysed coking.
7 cl, 3 ex, 4 dwg
