Patent ID: 7718840

Claim:
A process for producing light olefins from hydrocarbon feedstock, comprising the steps of: (a) providing full-range naphtha or kerosene as feedstock; (b) feeding the feedstock into at least one fixed-bed or fluidized-bed reactor where it is allowed to react in the presence of a catalyst; and (c) separating and recovering light olefins from the effluent of the reaction zone; in which the catalyst consists of a product obtained by the water evaporation of a raw material mixture comprising 100 parts by weight of a molecular sieve with a framework of —Si—OH—Al— groups, 0.01-5.0 parts by weight of a water-insoluble metal salt with a solubility product (Ksp) of less than 10 −4 , and 0.05-17.0 parts by weight of a phosphate compound, wherein the water-insoluble metal salt is an oxide, hydroxide, or oxalate of at least one metal selected from a group consisting of alkaline earth metals, transition metals, and heavy metals having an oxidation state of + 3 to + 5.