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Hydrofining catalyst and preparation method thereof

A technology for hydrorefining and catalysts, which is applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., and can solve problems affecting catalyst performance, active metal agglomeration, etc.

Active Publication Date: 2020-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the metal solution is directly subjected to co-precipitation reaction, which easily causes local agglomeration of active metals, thereby affecting the performance of the catalyst.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Nickel nitrate was added into the dissolving tank 1 equipped with deionized water to prepare mixed solution A, and the weight concentration of Ni in mixed solution A was 55g / L in terms of NiO. Nickel nitrate is equipped with the dissolving tank 2 of deionized water, is mixed with mixed solution B, and the weight concentration of Ni in NiO in solution B is 40g / L. Deionized water is added in the reaction tank, and the weight concentration is based on Al 2 o 3 30g / L sodium metaaluminate solution and mixed solution A are added into the reaction tank in parallel flow for gelation reaction, the gelation temperature is kept at 55°C, the pH value is controlled at 7.6 during the co-flow gelation reaction process, and the gelation time Controlled at 0.8 hour, generate slurry I. The obtained precipitate slurry I was aged under stirring, the stirring speed was 200 rpm, the aging temperature was 75° C., the aging pH value was controlled at 7.2, and the aging was 0.7 hours. After ...

Embodiment 2

[0040] According to the method of Example 1, according to the component content ratio of catalyst B in Table 1, nickel nitrate and ammonium metatungstate are added to the dissolution tank 1 to prepare mixed solution A, and the weight concentration of Ni in mixed solution A is calculated as NiO 20.6g / L, W is WO 3 The weight concentration of meter is 20g / L. Add nickel nitrate to the dissolving tank 2 to prepare mixed solution B, the weight concentration of Ni in mixed solution B is 32g / L in terms of NiO. Add deionized water in the reaction tank, the weight concentration is based on Al 2 o 3 Add 22g / L sodium metaaluminate solution and mixed solution A into the reaction tank in parallel flow, keep the gelling temperature at 50°C, control the pH value at 7.4 during the co-flow gelling reaction process, and control the gelling time at 1.1 hours , generating slurry I. The obtained precipitate slurry I was aged under stirring, the stirring speed was 180 rpm, the aging temperature ...

Embodiment 3

[0042] According to the composition ratio of the catalyst C in Table 1, ammonium metatungstate is added to the dissolution tank 1 to prepare a mixed solution A, and W in the mixed solution A is made of WO 3 The weight concentration of meter is 34g / L. Add ammonium metatungstate to the dissolving tank 2 to prepare mixed solution B, W in mixed solution B is WO 3 The weight concentration of the meter is 20g / L. Add deionized water in the reaction tank, the weight concentration is based on Al 2 o 3 28g / L sodium metaaluminate solution and mixed solution A are added into the reaction tank in parallel flow, the gelling temperature is kept at 60°C, the pH value is controlled at 7.1 during the co-current gelling reaction process, and the gelling time is controlled at 1.2 hours , generating slurry I. The obtained precipitate slurry I was aged under stirring, the stirring speed was 190 rpm, the aging temperature was 72° C., the aging pH value was controlled at 6.8, and the aging was 0....

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PUM

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Abstract

The invention discloses a hydrofining catalyst and a preparation method thereof. The catalyst is a catalyst containing transition metal phosphide, the catalyst comprises the transition metal phosphideand alumina, based on the weight of the catalyst, the total content of the transition metal phosphide is 40%-95%, the content of the alumina is 5%-45%, the dispersity of the transition metal phosphide is 16%-40%, and the average particle diameter of the transition metal phosphide is 3-8 nm. The catalyst is a phosphide catalyst with high transition metal content, has the advantages of large specific surface area, more active centers, favorable dispersity and higher hydrodesulfurization and hydrodenitrification reaction properties, and is suitable for being used in ultra-deep hydrodesulfurization and hydrodenitrification reactions of diesel fractions.

Description

technical field [0001] The invention relates to a hydrorefining catalyst and a preparation method thereof, in particular to a phosphide hydrorefining catalyst with high transition metal content and a preparation method thereof. Background technique [0002] At present, crude oil is becoming increasingly heavy and inferior, coupled with the continuous development of the world economy and increasingly stringent environmental protection regulations, it is necessary to produce a large amount of light and clean fuels. The development and use of ultra-low sulfur or even sulfur-free gasoline and diesel is the trend of clean fuel development in the world today. There are sulfur-containing compounds with various structures and molecular weights in petroleum fractions, but in the ultra-deep desulfurization stage (sulfur content is less than 50μg / g), it is mainly to remove 4,6-dimethyldibenzothiophene and other effective Substituents of sulfur-containing compounds. Since the methyl g...

Claims

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Application Information

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IPC IPC(8): B01J27/188B01J27/185B01J35/10B01J37/03C10G45/08C10G45/06
CPCB01J27/188B01J27/1853B01J37/031C10G45/08C10G45/06B01J35/393B01J35/394B01J35/633B01J35/615Y02P30/20
Inventor 王海涛方向晨徐学军刘东香王继锋李娟
Owner CHINA PETROLEUM & CHEM CORP
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