Catalyst for catalytic cracking gasoline hydrodesulfurization and preparation method thereof

A technology for catalytic cracking gasoline and hydrodesulfurization, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc. The effect of improving hydrodesulfurization selectivity, good particle size controllability, and good desulfurization selectivity

Active Publication Date: 2022-05-13
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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  • Catalyst for catalytic cracking gasoline hydrodesulfurization and preparation method thereof
  • Catalyst for catalytic cracking gasoline hydrodesulfurization and preparation method thereof
  • Catalyst for catalytic cracking gasoline hydrodesulfurization and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mix 100 g pseudo-boehmite, 4.0 g field green powder, 5.0 g HNO 3 and 75 g of deionized water were put into a kneader and kneaded into a block, then put into an extruder, extruded using a clover template with a diameter of 2.0 mm, and then dried at a temperature of 65°C for 4 h, and then dried at a temperature of 500°C Calcined under the condition of 4 h to get Al 2 o 3 carrier.

[0027] According to 3wt%Co 3 o 4 content, a certain amount of cobalt acetate was dissolved in 70 mL of ammonia water to prepare a solution, which was impregnated in Al by equal volume method 2 o 3 supported, aged for 12 h, dried at 65°C for 4 h, and calcined at 500°C for 4 h to obtain Co 3 o 4 / γ-Al 2 o 3 Precursor.

[0028] According to 12wt%MoO 3 content and the molar ratio of S:Mo=4:1, dissolving ammonium heptamolybdate in an appropriate amount of ammonia water, then adding a certain amount of ammonium sulfide solution with a concentration of 20%, and reacting at 100°C for 1.0 h, ...

Embodiment 2

[0032] The preparation process is the same as in Example 1, and what is different from Example 1 is that the sulfur-containing compound is changed from ammonium sulfide to diethyl tetrasulfide; the synthesis temperature of ammonium tetrathiomolybdate is increased from 100°C to 130°C; The steaming temperature was reduced from 65°C to 60°C.

Embodiment 3

[0034] The preparation process was the same as in Example 1, except that the preparation temperature of ammonium tetrathiomolybdate was reduced from 100°C to 80°C, and the rotary evaporation temperature was reduced from 65°C to 55°C.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051C10G45/06
CPCB01J27/0515C10G45/06
Inventor 王廷海曹弘岳源源张航崔勍焱鲍晓军李伟新
Owner FUZHOU UNIV
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