A method for gasoline desulfurization

A gasoline and presulfurization technology, applied in the petroleum industry, treating hydrocarbon oil, refining to remove heteroatoms, etc., can solve the problem of low liquid yield, achieve large specific surface area, good internal diffusion effect, and mild reaction conditions

Inactive Publication Date: 2018-04-20
QINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems such as low liquid yield and waste lye treatment in this method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Dissolve 1.2 kg of zinc nitrate in 6 L of water to prepare a zinc-containing solution, and dissolve 0.24 kg of sodium meta aluminate and 0.30 kg of sodium carbonate in 4 L of water to prepare an aluminum-containing solution. Divide the zinc solution into 3 equal parts, 2L each. Take 2L of zinc-containing solution, keep the temperature at 80℃, add aluminum-containing mixed solution to it until the pH value reaches 9.0; stop dripping aluminum-containing mixed solution, and then dropwise add 2L zinc-containing solution to the mixing system, and continue to drip aluminum-containing solution The mixed solution is titrated until the pH value reaches 9.0; the aluminum-containing mixed solution and the zinc-containing solution are alternately titrated until the zinc-containing solution is completely added, and the aluminum-containing mixed solution is added dropwise for the last time until the pH reaches 9.0. The total titration time is 3 hours. The obtained mixture was aged at ...

Embodiment 2

[0051] The preparation method and steps of the zinc oxide-alumina-containing composite carrier were the same as in Example 1. The zinc oxide containing zinc aluminum spinel was prepared, and the pH value was adjusted to 8.7. Calculated as oxide, the content of zinc oxide is 70%; the specific surface area is 191m 2 / g. The composition and content of the composite carrier are the same as in Example 1. The difference is that after the composite carrier is obtained, the zinc oxide-alumina-containing composite carrier is surface modified by potassium and magnesium. The specific process includes the following steps: configure potassium nitrate And magnesium nitrate aqueous solution as spray solution, weigh 1.2g potassium nitrate and 10.7g magnesium nitrate respectively, completely dissolve them in 30ml distilled water, and then dilute with deionized water, spray the zinc oxide-alumina composite carrier to make the outside of the carrier The content of potassium and magnesium is 1.1 t...

Embodiment 3

[0055] The preparation method and steps of the zinc oxide-alumina-containing composite carrier are the same as in Example 1. Prepare zinc oxide containing zinc aluminum spinel, and adjust the pH to 9.3. Zinc oxide containing zinc aluminum spinel, the content of zinc oxide is 63% in terms of oxide; the specific surface area is 214m 2 / g.

[0056] The composite carrier includes 18.3 wt% zinc oxide containing zinc aluminum spinel, 79 wt% aluminum oxide, and the content of the auxiliary components phosphorus, potassium, and magnesium are respectively P 2 O 5 0.9wt%, K 2 O 0.8wt%, MgO 1.0wt%. Composite carrier specific surface area 242m 2 / g.

[0057] Nickel nitrate, ammonium molybdate, and cobalt nitrate were prepared into an impregnating solution, and the composite carrier containing zinc oxide-alumina was impregnated. The specific steps were the same as in Example 1. It was dried at 130°C for 4 hours and calcined at 600°C for 6 hours to obtain a hydrodesulfurization catalyst 3. T...

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Abstract

The invention discloses a gasoline desulfurization method. The method adopts a fixed bed reactor, the catalyst is a loaded nickel-cobalt-molybdenum catalyst, and the catalyst carrier is a composite carrier containing zinc oxide-alumina. The gasoline hydrodesulfurization process provided by the invention has the advantages of mild technological conditions, strong adaptability to different raw materials, low octane value loss and high desulfurization rate, and is suitable for deep desulfurization of high sulfur content and high olefin content gasoline.

Description

Technical field [0001] The invention belongs to the technical field of hydrodesulfurization, and more specifically uses an FCC gasoline hydrodesulfurization catalyst with a zinc oxide-alumina composite material as a carrier for selective hydrodesulfurization of FCC gasoline. Background technique [0002] As people's awareness of environmental protection continues to increase, the emission of toxic and harmful substances in automobile exhaust will be strictly controlled, so the quality of oil used as engine fuel is becoming more and more stringent. For this reason, various countries have put forward extremely stringent restrictions on automotive gasoline specifications, such as oxygen content, vapor pressure, benzene content, total aromatic content, boiling point, olefin content, and sulfur content, to reduce emissions of harmful substances. At present, more than 80% of my country's finished gasoline is FCC gasoline. As FCC gasoline generally contains 100-500v% sulfur, and even hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/08B01J27/19
CPCB01J27/19C10G45/08C10G2300/202
Inventor 晁会霞贾贞健罗祥生
Owner QINZHOU UNIV
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