Process for dehydrogenating light paraffins in a fluidized bed reactor

A process for dehydrogenating C.sub.2 -C.sub.5 paraffins to obtain in corresponding olefins, comprising reacting said paraffins with a catalytic system containing platinum, tin, an element of the lanthanide group and an alumina support in a fluidized bed reactor, where the heat required for the reaction is provided by said catalytic system as sensible heat, operating at a temperature of between 500.degree. and 700.degree. C. and at a pressure of between 1 and 2 kg/cm.sup.2, and regenerating said catalytic system by burning coke which has deposited on a surface of catalytic system, wherein the regeneration is conducted in air, optionally by increasing the temperature of the catalytic system, followed by reduction of said catalytic system with a reducing agent and wherein said catalytic system consists of:

• 0.05-1% by wt. platinum, 0.2-3% by wt. tin, 3-25% by wt. of an element of the lanthanide group, the remainder being alumina and, optionally, up to 5% by wt. silica and up to less than 1% by wt. chlorides.