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Nickel series hydrogenation catalyst, preparation method thereof and application thereof

A hydrogenation catalyst and catalyst technology, applied in chemical instruments and methods, through selective hydrogenation refining, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of impurity resistance needs to be improved, catalyst price is high, Short regeneration cycle and other issues, to achieve the effect of long regeneration cycle, strong resistance to impurities and sol, and low overall cost

Active Publication Date: 2012-07-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of using palladium-based catalysts are that the price of the catalyst is high, it is sensitive to trace impurities in raw materials such as sulfur, arsenic and nitrogen, etc., the operation is unstable, and the regeneration cycle is short, especially in the process of full fraction hydrogenation. Completely inactivated within a week at the shortest
[0007] CN 1429890A discloses a catalyst for selective hydrogenation of pyrolysis gasoline, its active component is palladium, but its anti-impurity ability still needs to be improved

Method used

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  • Nickel series hydrogenation catalyst, preparation method thereof and application thereof
  • Nickel series hydrogenation catalyst, preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of vector

[0043] The specific surface area of ​​100g is 176m 2 / g and a clover-shaped alumina with a pore volume of 0.54mL / g was impregnated with 50mL of titanium sulfate in a 0.6g / mL dilute sulfuric acid solution for 2 hours, dried at 110°C for 10 hours, and calcined at 700°C for 4 hours , 125 g of alumina-titania composite carrier 1 was obtained, wherein the weight ratio of alumina to titania was 4:1.

[0044] Catalyst preparation

[0045] Add 5.02g of nickel nitrate to 5mL of water, stir to dissolve, add 0.56g of chromium nitrate while stirring, adjust the pH value to 5 with dilute nitric acid, impregnate 10g of alumina-titania composite carrier 1 in it for 3 hours, filter out and impregnate The composite carrier 1 was dried at 120°C for 6 hours and calcined at 600°C for 5 hours to obtain 11.4g of catalyst 1A with a specific surface area of ​​162m 2 / g, the pore volume is 0.52mL / g.

[0046] Add 5.02g of nickel nitrate into 5mL of water, stir to ...

Embodiment 2

[0050] Preparation of vector

[0051] The specific surface area of ​​95g is 176m 2 / g and clover-shaped alumina with a pore volume of 0.54mL / g was impregnated with 50mL tetraethyl titanate in 0.526g / mL cyclohexane solution for 2 hours, dried at 120°C for 8 hours, and then dried at 700°C Calcined at lower temperature for 5 hours, 119 g of alumina-titania composite carrier 2 was obtained, wherein the weight ratio of alumina to titania was 4:1.

[0052] Catalyst preparation

[0053] Add 5.8g of nickel nitrate into 5mL of water, stir to dissolve, add 1.02g of chromium nitrate while stirring, adjust the pH value to 5 with dilute nitric acid, impregnate 10g of alumina-titania composite carrier 2 in it for 4 hours, filter out and impregnate The composite carrier 2 was dried at 120°C for 6 hours and calcined at 600°C for 5 hours to obtain 11.9g of catalyst 2D with a specific surface area of ​​178m 2 / g, the pore volume is 0.53mL / g.

[0054] Add 5.8g of nickel nitrate into 5mL ...

Embodiment 3

[0058] Preparation of vector

[0059] The specific surface area of ​​175g is 176m 2 / g and a clover-shaped alumina with a pore volume of 0.54mL / g was impregnated with 108mL tetraethyl titanate in 0.81g / mL cyclohexane solution for 3 hours, dried at 120°C for 8 hours, and then dried at 600°C Calcined at the bottom for 4 hours to obtain 205 g of alumina-titania composite carrier 3, wherein the weight ratio of alumina to titania was 17:3.

[0060] Catalyst preparation

[0061] Add 6.8g of nickel nitrate to 5mL of water, stir to dissolve, add 1.12g of chromium nitrate while stirring, adjust the pH value to 5 with dilute nitric acid, impregnate 10g of alumina-titania composite carrier 3 in it for 4 hours, filter out and impregnate The composite carrier 3 was dried at 120°C for 6 hours and calcined at 500°C for 5 hours to obtain 12.2g of catalyst 3G with a specific surface area of ​​184m 2 / g, the pore volume is 0.52mL / g.

[0062] Add 6.8g of nickel nitrate to 5mL of water, s...

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Abstract

The invention relates to a nickel series hydrogenation catalyst. The nickel series hydrogenation catalyst comprises an aluminum oxide-titanium oxide composite carrier, and nickel oxide and chromic oxide which are carried on the composite carrier, wherein in the aluminum oxide-titanium oxide composite carrier, the weight ratio of aluminum oxide to titanium oxide is 2:1 to 7:1; the content of the nickel oxide accounts for 10 to 15 weight percent of that of the catalyst; and the content of the chromic oxide accounts for 2 to 6 weight percent of that of the catalyst. The invention also relates to a method for preparing the catalyst and the application of the catalyst to hydrogenation of cracked gasoline or fractions of the cracked gasoline. The catalyst has the advantages of low-temperature hydrogenation activity, high stability and the like and is low in overall cost.

Description

technical field [0001] The present invention relates to a nickel-based hydrogenation catalyst, and further relates to a method for preparing the catalyst and an application of the catalyst in hydrogenating pyrolysis gasoline or its fractions. Background technique [0002] In the ethylene industry, pyrolysis gasoline is the largest by-product next to ethylene in terms of its output. pyrolysis gasoline from C 5 -C 9 Composed of hundreds of compounds, rich in benzene, toluene, xylene, trimethylbenzene and other components, the total aromatic content is as high as 72-78% by weight. In industry, usually cut to isolate C 6 -C 8 、C 8 or C 9 Different fractions or whole fractions are subjected to two-stage hydrorefining to produce products such as benzene, toluene, xylene, gasoline blend oil and aromatic solvent oil. [0003] Before the 1970s, the one-stage hydrogenation process of pyrolysis gasoline was mainly carried out by adding a large amount of washing oil to the raw ma...

Claims

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Application Information

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IPC IPC(8): B01J23/86C10G45/34
Inventor 季静柴忠义纪玉国任玉梅杜周
Owner CHINA PETROLEUM & CHEM CORP
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