Preparation method of catalyst for hydrogenation desulfurization and denitrification of light-weight oil

A denitrification catalyst, hydrodesulfurization technology, applied in the direction of catalyst carrier, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problems of increasing production cost, enlargement, etc., and achieve high mechanical strength and good denitrification effect , the effect of moderate acidity on the surface

Inactive Publication Date: 2011-11-23
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst has good hydrorefining activity for light distillate oil, but the active metals supported by it are Ni and Mo. As far as the current domestic price is concerned, the price of molybdenum oxide is higher than that of tungsten oxide. Therefore, for domestic Oil refining enterprises, using Ni-Mo / Al 2 o 3 Type catalysts increase production costs
[0007] At present, although great progress has been made in the research and development and industrial application of domestic low-sulfur and ultra-low-sulfur diesel hydrotreating catalysts, there is still a certain gap compared with foreign advanced technologies. The catalytic nature of clean diesel hydrotreating catalysts should be strengthened Intensify the development of key technologies such as new catalyst supports and active metal positioning impregnation

Method used

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  • Preparation method of catalyst for hydrogenation desulfurization and denitrification of light-weight oil
  • Preparation method of catalyst for hydrogenation desulfurization and denitrification of light-weight oil
  • Preparation method of catalyst for hydrogenation desulfurization and denitrification of light-weight oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 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.

[0028] At room temperature, add 42g of ammonium metatungstate hexahydrate, 25g of ammonium heptamolybdate tetrahydrate, 37g of nickel nitrate hexahydrate and 4g of ethylene glycol into 120mL of deionized water, stir evenly, and after they are completely dissolved, set the volume to 200mL to obtain The first step is to co-immerse the solution and put it aside for later use. Take 120 g of the carrier strips prepared in the previous step in the dipping tank, add...

Embodiment 2

[0031] 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.

[0032] At room temperature, add 7g of ethanolamine to 120mL of deionized water, after dissolving, add 46g of ammonium metatungstate hexahydrate, 25.5g of ammonium heptamolybdate tetrahydrate, 35g of nickel nitrate hexahydrate and 5g of phosphoric acid, wait until it is completely dissolved, and set the volume to 200mL A stable co-immersion solution was obtained. Divide the co-immersion solution into two parts of equal volume and set as...

Embodiment 3

[0035] 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.

[0036] At room temperature, add 8g aminotriacetic acid to 30mL concentrated ammonia water, after dissolving, add deionized water until the volume of the solution is 120mL, add nitric acid dropwise until the pH is 3~4, add 44g ammonium metatungstate hexahydrate, 26g Ammonium heptamolybdate tetrahydrate, 36g nickel nitrate hexahydrate, and 6g phosphoric acid were completely dissolved, and the volume was adjusted to 200mL to ob...

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Abstract

The invention discloses a preparation method of a catalyst for hydrogenation desulfurization and denitrification of light-weight oil and is characterized in that the composition of the catalyst comprises a carrier, an auxiliary agent and active metals, wherein the carrier contains aluminum oxide, titanium oxide and silicon oxide; the auxiliary agent is phosphorus; the active metals are oxides of nickel, molybdenum and tungsten; and on the basis of the catalyst, the contents of all components in percentage by weight are as follows: 1 to 4 percent of cobalt oxide, 3 to 10 percent of nickel oxide, 2 to 12 percent of molybdenum oxide, 18 to 30 percent of tungsten oxide, 2 to 5 percent of phosphorus pentoxide, 2 to 15 percent of titanium oxide, 2 to 20 percent of silicon oxide, and the balance of aluminum oxide. The catalyst is obtained by the steps of carrier preparation, co-immersion, calcination and the like.

Description

technical field [0001] The invention belongs to the technical field of oil refining and catalysis, and in particular relates to a preparation method of a light oil hydrodesulfurization and denitrogenation catalyst. Background technique [0002] With the heavy and inferior quality of crude oil and increasingly stringent environmental regulations, the content of sulfur and nitrogen in diesel hydrogenation raw materials continues to rise, while the sulfur content limit in products is getting lower and lower, which makes traditional hydrogenation technology face new challenges. challenge. The core of hydrorefining technology is the hydrorefining catalyst. The latest scientific research and practical achievements at home and abroad are mainly manifested in the following aspects: by further adjusting the active components, using new composite carriers, introducing appropriate additives for modification, and adding metal complexing agents during the impregnation preparation proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J32/00B01J21/12C10G49/04
Inventor 石芳杨建国刘红光于海斌张国辉李佳赵训志
Owner CHINA NAT OFFSHORE OIL CORP
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