FIELD: chemistry.
SUBSTANCE: method is characterised by contacting a gas stream containing at least one of said hydrocarbons with a dehydrogenation catalyst containing gallium and platinum and deposited on a support made of aluminium oxide or aluminium oxide and silicon dioxide, at reaction temperature in a direct-flow, upward stream with weight ratio of catalyst to hydrocarbon of 5 to 100 in a dehydrogenation reactor, wherein the average contact time of the hydrocarbon with the catalyst in the zone of the dehydrogenation reactor ranges from 1 s to 4 s, and temperature and pressure in the dehydrogenation reactor range from 570 to 750°C and from 41.4 (6.0) to 308 (44.7) kPa (psia); and moving the hydrocarbon and the catalyst from the dehydrogenation reactor into a separation device, wherein the average contact time of the hydrocarbon with the catalyst at reaction temperature in the separation device is less than 5 s, and the full average contact time between the hydrocarbon, catalyst and the formed hydrocarbons is less than 10 s; and moving the catalyst from the separation device into a regenerator, where the catalyst is brought into contact with an oxygen-containing regenerating stream and additional fuel.
EFFECT: method has short contact time between the hydrocarbon and the catalyst.
7 cl, 5 dwg
