Method for hydrogenation and arsenic removal of distillate oil

A technology for distillate oil and arsenic removal, which is applied in chemical instruments and methods, processing of hydrocarbon oil, petroleum industry, etc., can solve the problems of complex composition of liquid naphtha hydrocarbons, poor hydrodearsenic activity, and poor resistance to impurities, etc. To achieve the effect of good hydrodearsenic activity and stability, low price and mild process conditions

Inactive Publication Date: 2017-08-04
QINZHOU UNIV
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  • 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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  • Method for hydrogenation and arsenic removal of distillate oil
  • Method for hydrogenation and arsenic removal of distillate oil

Examples

Experimental program
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Effect test

Embodiment 1

[0034] First, 8.0 g of the water-soluble chitosan pore-enlarging agent was added to deionized water at 50° C., and then acetic acid was added dropwise until the chitosan was completely dissolved to obtain an acid solution containing the pore-enlarging agent. Weigh 1.46g of phosphoric acid and 7.35g of magnesium nitrate respectively, and completely dissolve phosphoric acid and magnesium nitrate in 70g of distilled water to form an aqueous solution containing phosphorus and magnesium. Weigh 350g of pseudo-boehmite powder and 20.0g of fenugreek powder into the kneader, mix well, then add the mixed solution of phosphoric acid and magnesium nitrate, and finally add the acid solution containing chitosan to the pseudo-boehmite The powder is evenly kneaded, and then kneaded-extruded into a clover shape. Dry at 120° C. for 8 hours, and calcined at 700° C. for 4 hours to obtain an alumina carrier 1 containing phosphorus and magnesium. In carrier 1, phosphorus pentoxide is 0.5wt%, and m...

Embodiment 2

[0039] Add 8.0 g of the water-soluble chitosan pore-enlarging agent into deionized water at 50° C., and then add acetic acid dropwise until the chitosan is completely dissolved to obtain an acid solution containing the pore-enlarging agent. Weigh 1.09g of phosphoric acid and 9.12g of magnesium nitrate respectively, completely dissolve phosphoric acid and magnesium nitrate in 70g of distilled water to form an aqueous solution containing phosphorus and magnesium. Weigh 350g of pseudo-boehmite powder and 20.0g of fennel powder into the kneader, mix well, then add the mixed solution of phosphoric acid and magnesium nitrate, and finally add the acid solution containing chitosan to the pseudo-boehmite The stone powder is evenly kneaded, and then kneaded-extruded into a clover shape. Dry at 120° C. for 8 hours, and calcined at 700° C. for 4 hours to obtain an alumina carrier 1 containing phosphorus and magnesium. Then use phosphorus and magnesium to modify the surface of the carrier...

Embodiment 3

[0044] The preparation method of the carrier was carried out according to Example 1. The difference is that the water-soluble chitosan pore-enlarging agent is replaced by a non-water-soluble chitosan pore-enlarging agent, and the chitosan formic acid solution is stirred for 30 minutes with a magnetic stirrer. An alumina support 3 with a macroporous structure was obtained. The content of the auxiliary components phosphorus and magnesium in the carrier accounts for the percentage of the carrier mass, respectively P 2 o 5 1.8wt%, MgO2.0wt%. Its specific surface area and pore size distribution are shown in Table 1.

[0045] Nickel nitrate and ammonium molybdate were prepared as an impregnating solution, and 100 g of a carrier containing macroporous alumina was impregnated. The catalyst was dried at 130° C. for 6 hours and then calcined at 650° C. for 6.0 hours to obtain Hydrodearsenization Catalyst 3 . Catalyst 3 mainly consists of 9.0 wt% nickel oxide, 4.0 wt% molybdenum oxi...

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Abstract

The invention discloses a method for hydrogenation and arsenic removal of distillate oil. The active centers of a catalyst are nickel and molybdenum; an alumina carrier with a macroporous structure is used as a catalyst carrier and accounts for 70.0 to 96.0 wt%; the active component nickel oxide accounts for 2.0 to 20.0 wt%; and the active component nickel oxide accounts for 2.0 to 10.0 wt%. A fixed-bed reactor is used in a reaction. Process conditions are that reaction temperature is 120 to 220 DEG C; reaction pressure is 1.0 to 4.0 MPa; a hydrogen-oil volume ratio is 100-300: 1; and volume space velocity is 1.0 to 10.0 / h. The method has the following advantages: reaction conditions are mild; raw materials are widely available; the arsenic removal rate of a product is high; and the catalyst has long-period reaction activity, good stability and a long operation period.

Description

technical field [0001] The invention relates to a method for hydrodearsenication of distillate oil, in particular to using a hydrodearsenication catalyst supported by alumina with a macroporous structure for the hydrodearsenication reaction of naphtha. Background technique [0002] It is well known that arsenic compounds in petroleum hydrocarbons, especially liquid petroleum hydrocarbons, have obvious negative effects on their subsequent processing. The most prominent problem is causing catalyst poisoning. Arsenic compounds are also easy to deposit on the surface of the pipe, corrode the pipe, and cause 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 is growing rapidly, especially gasoline, diesel oil, solvent oil and lubricating oil. In recent years, due to the increasingly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/08B01J27/19
CPCB01J27/19B01J35/1019B01J35/1042B01J35/1047B01J35/1066C10G45/08C10G2300/1044C10G2300/201C10G2300/70
Inventor 罗祥生晁会霞肖长根柳力凤李剑云
Owner QINZHOU UNIV
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