Preparation method of hydrodesulfurization catalyst for high-nitrogen low-quality gasoline and diesel

A hydrodesulfurization and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve high dispersion, concentrated pore size distribution, and high mechanical strength

Active Publication Date: 2011-08-17
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, hydrodesulfurization has been paid much attention, but this situation is changing. On the one hand, the processing of high-nitrogen heavy oil has become the general trend; on the other hand, the existence of nitrogen compounds inhibits the deep hydrodesulfurization performance of catalysts.

Method used

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  • Preparation method of hydrodesulfurization catalyst for high-nitrogen low-quality gasoline and diesel
  • Preparation method of hydrodesulfurization catalyst for high-nitrogen low-quality gasoline and diesel
  • Preparation method of hydrodesulfurization catalyst for high-nitrogen low-quality gasoline and diesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 240g of a macroporous aluminum hydroxide dry rubber powder, the alumina content of which is 70%, is mixed with 6g of scallop powder, 9g of 66% concentrated nitric acid and 10g of oxalic acid, added deionized water, kneaded and mixed in a kneader, Afterwards, the strips are extruded by an extruder to obtain clover strips with a diameter of 1.5 mm. After drying in an oven at 120°C for 12 hours and calcining in a muffle furnace at 500°C for 4 hours, carrier Z-A was obtained, and its properties are shown in Table 1.

[0030] At room temperature, add 42g of ammonium metatungstate, 25g of ammonium heptamolybdate, 37g of nickel nitrate and 4g of citric acid into 120mL of deionized water, and stir evenly. Set aside. Take 120 g of the carrier strips prepared in the previous step in the dipping tank, add the above co-impregnation solution, and impregnate for 3 hours, then dry the wet strips in an oven at 120°C for 7 hours, and bake them in a muffle furnace at 400°C for 4 hours. ...

Embodiment 2

[0033] 240g of a macroporous aluminum hydroxide dry rubber powder, the alumina content of which is 70%, is mixed with 23g of metatitanic acid, 6g of scallop powder, 9g of 66% concentrated nitric acid and 10g of oxalic acid, added deionized water, and mixed in a kneader Knead and mix in middle, and then extrude and shape through extruder to obtain four-leaf clover strips with a diameter of 1.5mm. Dry in an oven at 120°C for 12 hours, and bake in a muffle furnace at 550°C for 4 hours to obtain carrier Z-B, whose properties are shown in Table 1.

[0034] At room temperature, add 7g of ethanolamine to 120mL of deionized water. After dissolving, add 46g of ammonium metatungstate, 25.5g of ammonium heptamolybdate, 35g of nickel nitrate and 5g of phosphoric acid. Divide the co-immersion solution into two parts of equal volume and set aside for later use.

[0035] Take 120 g of the carrier strips prepared in the previous step in the dipping tank, add one part of the co-immersion solu...

Embodiment 3

[0037] 240g of a macroporous aluminum hydroxide dry rubber powder, whose alumina content is 70%, is mixed with 24g of metatitanic acid, 63g of 25% silica sol, 6g of kale powder, 9g of 66% concentrated nitric acid and polyethylene glycol (Polymerization degree 2000) 10g, add deionized water, knead and mix in a kneader, and then extrude and shape through an extruder to obtain clover strips with a diameter of 1.5mm. Dry in an oven at 120°C for 12h, and bake in a muffle furnace at 550°C for 4h. The properties of the obtained carrier Z-C are shown in Table 1.

[0038] At room temperature, add 8g of aminotriacetic acid to 30mL of concentrated ammonia water, after dissolving, add deionized water until the volume of the solution is 120mL, add nitric acid dropwise until the pH is between 3 and 4, and then add 44g of ammonium metatungstate, 26g of heptamolybdenum ammonium nitrate, 36g nickel nitrate, 6g phosphoric acid, after they are completely dissolved, set the volume to 200mL to obt...

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Abstract

The invention relates to a preparation method of a hydrodesulfurization catalyst for high-nitrogen low-quality gasoline and diesel. The catalyst is characterized in that an A12O3-TiO2-SiO2 ternary oxide is taken as a composite carrier; the catalyst comprises the carrier, an auxiliary and active metals; the active metals comprise oxides of nickel, molybdenum and tungsten; the auxiliary is phosphorus; the carrier comprises aluminum oxide, titanium oxide and silicon oxide; based on the weight of the catalyst, nickel oxide accounts for 1-15 wt%, molybdenum oxide accounts for 2-12 wt%, tungsten oxide accounts for 12-35 wt%, phosphorus pentoxide accounts for 2-5% wt%, the titanium oxide accounts for 2-15 wt%, the silicon oxide accounts for 2-20 wt%, and the balance is aluminum oxide. In the method, a room-temperature complexation method is adopted for preparing W-Mo-Ni-P co-impregnation solution with stable dissolution performance, and then the step-by-step saturated impregnation technologyis adopted for loading the active metal components W-Mo-Ni and the auxiliary P on the carrier..

Description

technical field [0001] The invention belongs to the field of petroleum refining, and in particular relates to a preparation method of a hydrodesulfurization catalyst for high-nitrogen low-quality gasoline and diesel. Background technique [0002] In recent years, as crude oil becomes heavier and the regulations on the sulfur content of clean fuels become stricter, the quality of coked gasoline, coked diesel, catalytically cracked diesel and high-sulfur straight-run diesel can no longer meet the requirements of refined oil products, and cannot be shipped directly. It must be hydrorefined to produce high-quality gasoline and diesel. The core of hydrorefining technology is the hydrorefining catalyst. [0003] The gasoline hydrogenation catalyst disclosed in CN85104438 uses high-purity alumina as a carrier, tungsten and nickel as active components, and fluorine as an auxiliary agent. The fluorine in the catalyst is easily lost during industrial operation, and the fluorine corr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/08B01J27/19
Inventor 杨建国石芳张国辉刘红光于海斌李佳赵训志李孝国南军
Owner CHINA NAT OFFSHORE OIL CORP
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