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A kind of preparation method of hydrogenation refining catalyst

A hydrofinishing and catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc. Easy to accumulate and other problems

Active Publication Date: 2022-03-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bulk phase catalyst obtained by this method has a high content of active metals in the surface phase, which is easy to accumulate excessively, thereby affecting the morphology and dispersion of the stacked layer of the active phase
[0011] In the existing co-precipitation method for preparing bulk catalysts, different precipitation methods and gelation conditions will have a great impact on the coordination mode of the catalytic active metal, the distribution of the hydrogenation active metal and the interaction between different hydrogenation active metals. The effect of the sulfided bulk catalyst will also lead to MoS 2 / WS 2 There is a marked difference in the shape of the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Nickel chloride, ammonium metatungstate are added respectively to dissolving tank 1 that deionized water is housed, and mixed solution A is made, and the weight concentration of Ni in NiO in mixed solution A is 28g / L, and W is expressed as WO 3 The weight concentration of meter is 27g / L. Ammonium metatungstate, ammonium molybdate, and aluminum chloride were respectively added to the dissolving tank 2 equipped with deionized water to prepare a mixed solution B. In the mixed solution B, W was replaced by WO 3 The weight concentration of Mo is 30g / L, Mo is MoO 3 The weight concentration is 36g / L, Al is expressed as Al 2 o 3 The weight concentration of meter is 26g / 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, benzylamine and mixed solution A are fed into the reaction tank in parallel, the molar ratio of benzylamine to mixed solution A is 1.5, the gel forming temperature is kept ...

Embodiment 2

[0054] According to the method of embodiment 1, press the component content ratio of catalyst B in table 1, add nickel chloride, ammonium metatungstate, zirconium oxychloride solution in dissolution tank 1, prepare mixed solution A, add to dissolution tank 2. Add ammonium metatungstate, ammonium molybdate and aluminum nitrate to prepare mixed solution B. Deionized water is added in the reaction tank, and the weight concentration is based on Al 2 o 3 45g / L of sodium metaaluminate solution, cyclohexylamine and mixed solution A are added to the reaction tank in parallel flow, the molar ratio of cyclohexylamine to mixed solution A is 1.6, the gel forming temperature is kept at 45°C, and the mixed solution A is co-flowed. During the gelation reaction process, the pH value was controlled at 8.2, and the gelation time was controlled at 1.2 hours to generate slurry I containing nickel, tungsten, aluminum, and zirconium precipitates. The obtained precipitate slurry I was aged under s...

Embodiment 3

[0056] According to the method of Example 1, according to the composition ratio of the catalyst C in Table 1, nickel nitrate and ammonium metatungstate solution are added to the dissolution tank 1 to prepare a mixed solution A, and metatungstate is added to the dissolution tank 2 Ammonium, ammonium molybdate, and aluminum chloride are used to prepare mixed solution B. Deionized water is added in the reaction tank, and the weight concentration is based on Al 2 o 3 33g / L sodium metaaluminate solution, ethanolamine and mixed solution A are fed into the reaction tank in parallel, the molar ratio of ethanolamine to mixed solution A is 1.7, the gelling temperature is kept at 50°C, and the gelling reaction process is carried out concurrently The pH value of the medium is controlled at 7.7, and the gelation time is controlled at 0.9 hours to generate slurry I containing nickel, tungsten, and aluminum precipitates. The obtained precipitate slurry I was aged under stirring, the stirri...

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Abstract

The invention discloses a preparation method of a hydrogenation refining catalyst. The hydrorefining catalyst is first to flow the mixed solution A containing Ni and W and the alkaline solution of sodium metaaluminate to co-flow for gelation reaction, add organic amine during the gelation process, and age the obtained slurry; The mixed solution B of W, Mo, Al components and ammonia water are added to the above-mentioned aged slurry for gelation reaction. During the gelation reaction process, organic amines are selectively added, and then aged, and then dried and formed. and other steps to make a hydrorefining catalyst. The catalyst can be applied in ultra-deep hydrodesulfurization and denitrogenation reactions of diesel fractions, has high hydrodesulfurization and hydrodenitrogenation reaction activity, and is especially suitable for processing diesel raw materials with high nitrogen and high sulfur content.

Description

technical field [0001] The invention relates to a method for preparing a hydrogenation catalyst, in particular to a method for preparing a bulk phase hydrogenation refining catalyst. 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. The use of traditional hydrodesulfurization catalysts can also achieve deep desulfurization or even ultra-deep desulfurization of diesel oil by increasing the severity of the reaction, such as increasing the reaction temperature, hydrogen partial pressure or reducing the reaction space velocity, but the increase in the reaction temperature will lead to the color of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888B01J27/047B01J27/051B01J37/03B01J37/08B01J37/20C10G45/04C10G45/08
CPCB01J23/8885B01J27/047B01J27/051B01J37/031B01J37/036B01J37/082B01J37/20C10G45/04C10G45/08C10G2300/202C10G2400/04
Inventor 徐学军王海涛刘东香冯小萍王继锋
Owner CHINA PETROLEUM & CHEM CORP