Procedure for the production of olefins.'This Invention relates to a method for producing Light Olefins that are less than 5 Carbon Atoms.Characterized in that it comprises: (a) contacting Hydrogen and carbon oxide in at least a first reaction ZoneAt conditions effective to react Chemically Hydrogen and carbon oxide and to produce a product that comprises Methanol in the effluent from the first reaction Zone; (b) to COntact substantially all of the effluent from the first reaction Zone, a Second reaction Zone containing a Solid Catalyst, three-dimensional, MicroporousCrystal of small pores to conditions effective to promote the conversion of methanol to olefins and producing the Light Olefins in the effluent from the second reaction Zone; (c) to retrieve aThe effluent Product enriched in Olefins, The reaction Zone; and (d) to submit at least one Hydrogen and at least one carbon oxide, the effluent from the second reaction ZoneThe Step (a).