A method for catalytic diesel hydrodearomatization

A technology of hydrodearomatization and catalytic diesel, which is applied in the direction of hydrogenation and refining of aromatics, and can solve the problem of high initial boiling point of diesel raw materials

Active Publication Date: 2011-12-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] CN1407066A discloses a method for hydrogenation and upgrading of catalytic diesel oil. The method uses a hydrogenation catalyst containing molecular sieves to carry out dearomatization, desulfurization and increase of cetane by one-stage method, serial one-stage method and two-stage method. value, but the initial boiling point of the diesel feedstock involved in this method is relatively high

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  • A method for catalytic diesel hydrodearomatization
  • A method for catalytic diesel hydrodearomatization

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Experimental program
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Effect test

Embodiment 1

[0025] With 39g modified Y molecular sieve, with 119.5g alumina (Jiangyan Chemical Auxiliary Factory, dry basis 72wt%), 41g amorphous silicon aluminum (SiO 2 The content is 45wt%, the pore volume of amorphous silicon aluminum is 0.51ml / g, and the specific surface area is 360m 2 / g), 5.9g scallop powder, after mixing, add dropwise the mixed solution of 8.0g concentrated nitric acid (96wt%), 5.4g citric acid and 135g water, extrude into 1.3mm cylindrical shape, dry at 100°C, and dry at 520°C Air atmosphere roasting 4hr. Then impregnate with 22g of nickel nitrate and 35g of ammonium metatungstate dissolved in 50ml of water for 4hr, dry at 100°C, and calcine at 470°C for 5hr in an air atmosphere to obtain catalyst A. According to specific requirements, it can be crushed or cut into the required particle size or length, and hydrogenation reaction can be carried out after vulcanization.

Embodiment 2

[0027] Beta molecular sieve after 39g modification, and 119.5g aluminum oxide (Jiangyan Chemical Auxiliary Factory, dry basis 72wt%), 41g amorphous silicon aluminum (SiO 2 The content is 45wt%, the pore volume of amorphous silicon aluminum is 0.51ml / g, and the specific surface area is 360m 2 / g), 5.9g scallop powder, after mixing, add dropwise the mixed solution of 8.0g concentrated nitric acid (96wt%), 5.4g citric acid and 135g water, extrude into a 1.3mm cylindrical shape, dry at 100°C, and then Baking in air atmosphere at 520°C for 4hr. Then impregnate with a solution of 22g nickel nitrate and 35g ammonium metatungstate dissolved in 50ml water for 4hr, dry at 100°C, and roast in air atmosphere at 470°C for 5hr to obtain catalyst B. According to specific requirements, it can be crushed or cut into the required particle size or length, and hydrogenation reaction can be carried out after vulcanization.

Embodiment 3

[0029] With 39g modified Y / Beta (mass ratio 3: 1) microporous molecular sieve, and 119.5g alumina (Jiangyan Chemical Auxiliary Factory, dry basis 72wt%), 41g amorphous silicon aluminum (SiO 2 The content is 45wt%, the pore volume of amorphous silicon aluminum is 0.51ml / g, and the specific surface area is 360m 2 / g), 5.9g scallop powder, after mixing, add dropwise the mixed solution of 8.0g concentrated nitric acid (96wt%), 5.4g citric acid and 135g water, extrude into a 1.3mm cylindrical shape, dry at 100°C, and then Baking in air atmosphere at 520°C for 4hrs. Then impregnate with a solution of 22g nickel nitrate and 35g ammonium metatungstate dissolved in 50ml water for 4hr, dry at 100°C, and roast at 470°C in air atmosphere for 5hr to obtain catalyst C. According to specific requirements, it can be crushed or cut into the required particle size or length, and hydrogenation reaction can be carried out after vulcanization.

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Abstract

The invention relates to a method for catalyzing diesel oil hydrogenation dearomatization. The distillation range of catalytic diesel feed is 150-380°C; in the presence of hydrogen, the reaction temperature is 330-370°C, the hydrogen partial pressure is 6-9MPa, and the hydrogen oil The volume ratio is 500:1~1000:1, the liquid hourly volume space velocity is 1.0~2.0hr-1; the catalyst composition is by weight: amorphous silicon aluminum: 15~40wt%, alumina: 5~30wt%, VIB Group metal oxide: 10-40wt%, Group VIII metal oxide: 1-15wt%, Beta / Y molecular sieve: 5-30wt%, the total weight of each component is 100wt%; the yield of diesel oil is above 97wt%, and the The removal rate of aromatics is above 60%, the removal rate of total sulfur and total nitrogen is above 98.5%, and the density of the product is reduced by more than 0.0400g / cm3.

Description

technical field [0001] The invention relates to a hydrogenation dearomatization catalyst made of a microporous molecular sieve material and loaded with non-precious metals, which is used to reduce the content and density of aromatics, sulfur, nitrogen and density in the distillate catalytic diesel oil at 150°C to 380°C. Methods of dearomatization. Background technique [0002] With the implementation of the new standard GB / T19147-2003 for "Diesel for Vehicles" and the national standard for "Diesel for Vehicles" moving closer to Euro IV, how to make the cetane number of diesel oil reach 51, the content of condensed ring aromatics less than 11wt%, and the sulfur content less than 50μg / g has become an urgent problem for my country's oil refining enterprises. [0003] my country's heavy oil processing technology is mainly based on catalytic cracking. Catalytic diesel oil accounts for more than 1 / 3 of the total diesel oil. The content of sulfur, nitrogen and other impurities is h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/54
Inventor 王甫村田然申宝剑孙发民朱金玲郭巧霞张学军戴宝琴郭淑芝王东青吕倩赵野周轶方芳马守涛王亮刘彦峰张全国丛丽茹李淑杰陈玉龙
Owner PETROCHINA CO LTD
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