Catalyst for catalytic cracking gasoline hydrodesulfurization and preparation method thereof

Abstract

The invention relates to a catalytic cracking gasoline hydrodesulfurization catalyst and a preparation method thereof, Co 3 o 4 ‑MoS 2 / γ‑Al 2 o 3 The catalyst preparation process includes three steps: using the equal volume method to impregnate Co onto the alumina support, and dry and roast to obtain Co 3 o 4 / γ‑Al 2 o 3 Precursor; dissolving sulfur-containing compounds and molybdenum-containing metal salts into ammonia water, and refluxing to prepare ammonium tetrathiomolybdate crystals; combining ammonium tetrathiomolybdate crystals, reducing agents and Co 3 o 4 / γ‑Al 2 o 3 The precursor was placed in a rotary evaporator, and the Co 3 o 4 ‑MoS 2 / γ‑Al 2 o 3 catalyst. Co prepared by the present invention 3 o 4 ‑MoS 2 / γ‑Al 2 o 3 The catalyst is due to the active phase composed of conventional Co 9 S 8 become Co 3 o 4 , used in catalytic cracking gasoline selective hydrodesulfurization reaction showed higher desulfurization selectivity.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, in particular to a catalytic cracking gasoline selective hydrodesulfurization catalyst and a preparation method thereof, the Co in the final catalyst is based on Co 3 o 4 exists in the form of , while Mo is in the form of MoS 2 form exists. Background technique [0002] With the increasingly stringent environmental regulations, the more stringent National V and National VI gasoline quality standards limit the sulfur content of motor gasoline to no more than 10 mg / kg. In my country, catalytic cracking (FCC) gasoline with high sulfur and high olefin content accounts for more than 60% of the total gasoline pool, and its contribution to the sulfur and olefin content of commercial gasoline exceeds 90%. The key to producing with clean gasoline. [0003] From a global perspective, the selective hydrodesulfurization (HDS) process is generally adopted by various refineries to reduce the sulfur con...

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Problems solved by technology

The above method of in-vehicle vulcanization shortens the process flow or controls the active phase to a certain extent, but there are still problems such as complex process, large environmental pollution and the use of toxic hydrogen sulfide gas.

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