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Hydrogenating and arsenic removing method of naphtha

A naphtha and arsenic removal technology, which is applied in the petroleum industry, chemical instruments and methods, and hydrocarbon oil treatment, etc., can solve the problems of complex composition of liquid naphtha hydrocarbons, poor hydrogenation and dearsenic activity, and poor impurity resistance. , to achieve the effect of reducing the hydrothermal treatment process, the raw material adaptability range is large, and the reaction pressure is low

Active Publication Date: 2017-06-13
山东明成石化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the complex composition of liquid naphtha hydrocarbons, the requirements for arsenic removal agents are relatively high. In the above-mentioned naphtha arsenic removal process, there are low arsenic capacity, poor hydrogenation dearsenic activity, poor resistance to impurities, and easy deactivation of the catalyst. Problems such as short running cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Dissolve 1.2 kg of zinc nitrate in 6L of water to prepare a zinc-containing solution, and dissolve 0.24 kg of sodium metaaluminate and 0.30 kg of sodium carbonate in 4L of water to prepare an aluminum-containing solution. Divide the zinc-containing solution into 3 equal parts, 2L each. Take 2L of zinc-containing solution, keep the temperature at 80℃, and 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 of zinc-containing solution to the mixing system, and continue to drip aluminum-containing solution Mix the solution until the pH value reaches 9.0; alternately titrate the aluminum-containing mixed solution and the zinc-containing solution until all the zinc-containing solution is 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 3h. The obtained mixture was aged at 80°C for 4 hours...

Embodiment 2

[0048] 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.

[0049] The composite carrier includes 32 wt% zinc oxide containing zinc aluminum spinel, 66 wt% aluminum oxide, and the content of the auxiliary components phosphorus, potassium, and magnesium are respectively P 2 O 5 0.6wt%, K 2 O 0.8wt%, MgO 0.6wt%.

[0050] The difference is that after obtaining the composite carrier, potassium and magnesium are used to modify the surface of the zinc oxide-alumina-containing composite carrier. The specific process includes the following steps: configure potassium nitrate and magnesium nitrate aqueous solutions as impregnating solutions, and weigh potassium nitrate separately , Magnesium nitrate, completely dissolved in 30ml of d...

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] Take nickel nitrate, ammonium molybdate and ammonium metatungstate to prepare an impregnation solution, and impregnate 100 g of a composite carrier containing zinc oxide-alumina. The specific steps are the same as in Example 1. The catalyst was dried at 130°C for 6 hours and then calcined at 600°C for 6.0 hours to obtain a hydrodearseni...

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Abstract

The invention discloses a hydrogenating and arsenic removing method of naphtha. A catalyst used by the method comprises, by the mass of oxide, 72.0-90.0wt% of composite support containing zinc oxide-aluminum oxide, 6.0-16.0wt% active component nickel oxide, 2.0-6.0wt% of molybdenum oxide and 2.0-6.0wt% of tungsten oxide. The method is mild in reaction condition, wide in raw material application range, high in product arsenic removing, good in long-period reaction activity stability and long in operation period.

Description

Technical field [0001] The invention relates to a naphtha hydrodearsenication method, more specifically a hydrodearsenication catalyst using a zinc oxide-alumina composite material as a carrier for the hydrodearsenication reaction of naphtha . Background technique [0002] As we all know, petroleum hydrocarbons, especially arsenic in liquid petroleum hydrocarbons, have obvious negative effects on their subsequent processing. The most prominent problem is to cause catalyst poisoning. Arsenic is also easy to deposit on the surface of the pipe guide, corroding the pipe and causing hidden dangers. In severe cases, arsenic will prevent certain processes from proceeding smoothly. With the improvement of environmental protection requirements and the improvement of harmful gas emission standards, the demand for clean oil products has grown rapidly, especially gasoline, diesel, solvent oil and lubricants. In recent years, due to the deteriorating quality of petroleum raw materials, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/08B01J23/888
CPCB01J23/888C10G45/08C10G2300/1044C10G2300/201C10G2300/70
Inventor 晁会霞石海信王爱荣
Owner 山东明成石化有限公司
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