METHOD OF PREPARING OLEFINIC C-C HYDROCARBONS Russian patent published in 1999 - IPC

FIELD: chemical industry. SUBSTANCE: described is method of preparing olefinic C₃-C₅ hydrocarbons by dehydrogenation of corresponding paraffinic hydrocarbons. Method is carried out in reactor-regenerator system containing fluidized alumochromium catalyst bed. In order to carry out preliminary heating to 300-6700, in said system catalyst with attrition index of 20-30% is used in amount of 10-80 wt % of required amount and catalyst with attrition index of 1-10 % is added thereto. EFFECT: lower consumption of catalyst. 4 ex, 2 tbl