Catalytically cracked gasoline hydrodesulfurization catalyst and preparation method thereof

A catalyst and compound technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as the use of toxic hydrogen sulfide gas, large environmental pollution, complex processes, etc., and improve hydrodesulfurization Selectivity, good particle size controllability, uniform dispersion effect

Active Publication Date: 2021-02-19
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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  • Catalytically cracked gasoline hydrodesulfurization catalyst and preparation method thereof
  • Catalytically cracked gasoline hydrodesulfurization catalyst and preparation method thereof
  • Catalytically cracked gasoline hydrodesulfurization catalyst 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 catalytically cracked gasoline hydrodesulfurization catalyst and a preparation method thereof. The preparation process of the Co3O4-MoS2/gamma-Al2O3 catalyst comprises the three steps: making Co impregnated onto an aluminum oxide carrier through an isopyknic method, and carrying out drying and roasting to obtian a Co3O4/gamma-Al2O3 precursor; dissolving a sulfur-containing compound and molybdenum-containing metal salt into ammonia water, and carrying out refluxing to prepare an ammonium tetrathiomolybdate crystal; and putting the ammonium tetrathiomolybdate crystal,a reducing agent and the Co3O4/gamma-Al2O3 precursor into a rotary evaporator, and preparing the Co3O4-MoS2/gamma-Al2O3 catalyst by virtue of a rotary evaporation method. According to the Co3O4-MoS2/gamma-Al2O3 catalyst prepared by the preparation method disclosed by the invention, the active phase is changed into Co3O4 from conventional Co9S8, and when being used in a selective hydrodesulfurization reaction of catalytically cracked gasoline, the Co3O4-MoS2/gamma-Al2O3 catalyst shows 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 Applications(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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