Patent ID: 9683183
Date: 2017-06-20
CPC Classifications: B01J,C10G

Claim:
1. A method for deep desulfurization of gasoline, comprising steps of: cutting a gasoline feedstock into a light gasoline fraction, a medium gasoline fraction, and a heavy gasoline fraction; subjecting the medium gasoline fraction to adsorption desulfurization to obtain a desulfurized medium gasoline fraction; subjecting the heavy gasoline fraction to selective hydrodesulfurization to obtain a desulfurized heavy gasoline fraction; and mixing the light gasoline fraction with the desulfurized medium gasoline fraction and the desulfurized heavy gasoline fraction to obtain a desulfurized gasoline; wherein, a cutting temperature of the light and the medium gasoline fractions is 35-60° C., and a cutting temperature of the medium and the heavy gasoline fractions is 70-130° C.; wherein the adsorption desulfurization is conducted using a desulfurization adsorbent, the desulfurization adsorbent is obtained by loading an active metal component onto a composite carrier made of zeolite and active carbon which are subjected to alkali treatment respectively, wherein, the active metal is selected from one or more elements of IA, VIII, IB, IIB and VIB groups in the periodic table; the method further comprising: washing the desulfurization adsorbent which has been subjected to the adsorption desulfurization with a steam to collect a sulfur-rich component; and subjecting the sulfur-rich component and the heavy gasoline fraction to the selective hydrodesulfurization after mixing them together.