Diesel hydrodesulfurization and denitrification catalyst and preparation method thereof

A denitrification catalyst, hydrodesulfurization technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc. high surface effect

Inactive Publication Date: 2014-02-05
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst has good hydrorefining activity for diesel 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, so it is suitable for domestic oil refining. Enterprises, using Ni-Mo / Al 2 o 3 Type catalysts will increase production costs

Method used

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  • Diesel hydrodesulfurization and denitrification catalyst and preparation method thereof
  • Diesel hydrodesulfurization and denitrification catalyst and preparation method thereof
  • Diesel hydrodesulfurization and denitrification catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 240g of a macroporous aluminum hydroxide dry rubber powder, whose alumina content 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 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 obtained carrier Z-A strips in an immersion tank, add the above co-impregnat...

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 safflower 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 listed in Table 1.

[0034] 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...

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 turmeric 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 through an extrusion machine 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 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...

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Abstract

The invention discloses a diesel hydrodesulfurization and denitrification catalyst. The catalyst comprises the following compositions: a carrier, an additive, and an active metal, wherein the carrier is an Al2O3-ZrO2-TiO2-SiO2 multibasic oxide composite carrier; the additive is phosphorus; nickel, cobalt, molybdenum and tungsten are taken as active components; through taking the catalyst as a benchmark, in terms of oxides, the catalyst comprises the following components in percentage by weight, 1-6wt% of cobalt oxide, 1-15wt% of nickel oxide, 2-12wt% of molybdenum oxide, 12-35wt% of tungsten oxide and 1.5-5wt% of an additive phosphorus pentoxide; and the pore volume of the catalyst is not less than 0.2 mL / g, the specific surface area of the catalyst is not less than 140 m<2> / g, and the mechanical strength of the catalyst is not less than 15N / mm; and the composite carrier comprises the following components in percentage by weight: 2-15wt% of titanium oxide, 2-20wt% of silicon oxide, 5-15wt% of zirconium oxide, and the balance of aluminum oxide.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a diesel hydrodesulfurization and denitrification catalyst and a preparation method thereof. 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 process, the catalyst can b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J35/10C10G45/08
Inventor 石芳于海斌张国辉赵训志钟读乐曲晓龙李佳
Owner CHINA NAT OFFSHORE OIL CORP
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