Patent ID: 7663013

Claim:
A process for producing light olefins, comprising the steps of: providing hydrocarbons fraction as a feed; transferring the feed into a reaction zone comprising at least one reactor to react the feed in the presence of a porous solid acid catalyst comprising a product of a pillaring reaction and a solid state reaction through heat treatment of a raw material mixture, and has a crystalline structure represented by an X-ray diffraction pattern as follows: 2θ Relative intensity 7.899 81.4 8.760 48.1 14.76 15.3 19.92 15.2 20.36 21.2 23.06 100 23.88 59.7 24.36 24.5 25.60 15.3 25.82 18.4 26.60 22.2 26.86 20.8 29.90 22.5 45.00 17.5 45.48 17.4 wherein the raw material mixture comprises 42.0-60.0 wt % HZSM-5 having Si/Al molar ratio of 15-300, 12.0-38.0 wt % layered compound, 1.0-20.0 wt % Al 2 O 3 , 1.0-4.0 wt % P 2 O 5 , 10.0-15.0 wt % SiO 2 , and 0.5-2.5 wt % B 2 O 3 based on an oxide form; and separating light olefins from an effluent of the reaction zone to recover light olefins.