Catalyst for hydrodesulfurization of gasoline and preparation method thereof

A gasoline hydrogenation and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, hydrocarbon oil treatment, etc., can solve the problems of complex structure of layered composite hydroxides, long reaction time, etc., and reduce hydrothermal treatment Process, large specific surface area, good internal diffusion effect

Inactive Publication Date: 2017-07-07
QINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the co-precipitation method, although the invention uses two precipitations, the specific surface area of ​​the prepared LDH material is higher, but the reaction time of the invention is longer, and the reaction time given in the examples is more than 10 hours
The purpose of this invention is to prepare layered composite hydroxide (LDH) with high specific surface area. The structural formula of this layered composite hydroxide is complex, which may involve multiple metals or combinations thereof. The preparation process requires two steps of precipitation respectively, and the reaction time longer

Method used

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  • Catalyst for hydrodesulfurization of gasoline and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Dissolve 1.2kg of zinc nitrate in 6L of water to make a solution containing zinc, and dissolve 0.24kg of sodium metaaluminate and 0.30kg of sodium carbonate in 4L of water to make a solution containing aluminum. Divide the zinc-containing solution into 3 equal parts, each 2L. Take 2L of zinc-containing solution, keep the temperature at 80°C, add aluminum-containing mixed solution dropwise to it until the pH value reaches 9.0; stop dropping the aluminum-containing mixed solution, then add 2L of zinc-containing solution dropwise to the mixing system, and continue to drop aluminum-containing solution Mix the solution until the pH value reaches 9.0; titrate the aluminum-containing mixed solution and the zinc-containing solution alternately until all the zinc-containing solutions are added, and add the aluminum-containing mixed solution dropwise until the pH reaches 9.0. The total titration time is 3 hours. The obtained mixture was aged at 80°C for 4h, cooled and washed unti...

Embodiment 2

[0044] The preparation method and steps of the composite carrier containing zinc oxide-alumina are the same as in Example 1, and the zinc oxide containing zinc-aluminum spinel is prepared, and the pH value is adjusted to 8.7. In terms of oxides, the content of zinc oxide is 70%; the specific surface area is 191m 2 / g.

[0045] The composite carrier includes 25wt% of zinc oxide containing zinc-aluminum spinel, 71.9wt% of aluminum oxide, and the contents of phosphorus, potassium and magnesium in auxiliary components are respectively 0.4wt% of P2O5, 0.8wt% of K2O and 0.6wt% of MgO.

[0046] The difference is that after the composite carrier is obtained, potassium and magnesium are used to modify the surface of the composite carrier containing zinc oxide-alumina. The specific process includes the following steps: configure an aqueous solution containing potassium nitrate and magnesium nitrate, and weigh 1.5 g of potassium nitrate , Magnesium nitrate 11.9g, completely dissolved in...

Embodiment 3

[0049] The preparation method and steps of the composite carrier containing zinc oxide-alumina are the same as in Example 1. Zinc oxide containing zinc aluminum spinel was prepared, and the pH value was adjusted to 9.3. Zinc oxide containing zinc aluminum spinel, calculated as oxide, the content of zinc oxide is 63%; the specific surface area is 214m 2 / g.

[0050] The composite carrier includes 18.3wt% of zinc oxide containing zinc-aluminum spinel, 79wt% of alumina, and the contents of phosphorus, potassium and magnesium in the auxiliary components are P 2 o 5 0.9wt%, K 2 O 0.8wt%, MgO 1.0wt%. Composite carrier specific surface area 242m 2 / g.

[0051] Ammonium molybdate and cobalt nitrate are prepared as an impregnation solution, and the composite carrier containing zinc oxide-alumina is impregnated. The specific steps are the same as in Example 1. Dry at 130°C for 4 hours, and calcined at 600°C for 6 hours to obtain Hydrodesulfurization Catalyst 3. The main composi...

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Abstract

The invention discloses a catalyst for hydrodesulfurization of gasoline and a preparation method thereof. The catalyst comprises the following components in percentage by weight based on the weight of oxides: 1.0-9.5wt% of an active component cobalt oxide, 1.5-13.0wt% of molybdenum oxide and 78.0-94.0wt% of a composite carrier containing zinc oxide-aluminum oxide. The hydrodesulfurization catalyst is low in loss of octane number and high in desulfurization degree.

Description

technical field [0001] The invention belongs to the technical field of hydrodesulfurization catalysts, in particular to a catalyst for hydrodesulfurization of gasoline and a preparation method thereof, more specifically to a FCC hydrodesulfurization with a zinc oxide-alumina composite material as a carrier Catalyst and preparation method. Background technique [0002] Because catalytic cracking gasoline generally has a sulfur content of 100-500v%, there are even high-sulfur and high-olefin feed oils with a sulfur content of more than 500 mg / kg and an olefin content of more than 40%. Selective hydrodesulfurization technology will inevitably cause partial saturation of olefins and lower octane number during deep hydrodesulfurization, which requires hydrodesulfurization catalyst to desulfurize while avoiding excessive loss of octane number as much as possible. [0003] Composite materials of zinc oxide and alumina are often used as desulfurization catalytic materials in the fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/19B01J35/10C10G45/08
CPCB01J27/19B01J35/1019C10G45/08C10G2300/202C10G2400/02
Inventor 晁会霞罗祥生邓勤
Owner QINZHOU UNIV
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