Method for preparing hydrofining catalyst

A hydrofining and catalyst technology, applied in chemical instruments and methods, catalyst activation/preparation, heterogeneous catalyst chemical elements, etc. Issues such as high phase active metal content

Active Publication Date: 2019-07-23
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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Nickel chloride, ammonium metatungstate are added respectively to dissolving tank 1 that deionized water is housed, and mixed solution A is mixed, 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 Add 30g / L sodium metaaluminate solution and mixed solution A into the reaction tank in parallel flow, keep the gelling temperature at 62°C, control the pH value at 7.8 during the co-flow gelling reaction proc...

Embodiment 2

[0050] 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 40g / L sodium metaaluminate solution and mixed solution A are added into the reaction tank in parallel flow, the gelling temperature is kept at 45°C, the pH value is controlled at 7.6 during the concurrent gelling reaction process, and the gelling time is controlled at 1.2 hours , Generate slurry I containing nickel, tungsten, aluminum, zirconium precipitate. The obtained precipitate slurry I was aged under stirring, the stirring speed was 170 rpm, the aging temperature was 74° C., the aging pH value was controlled at 7.2, and the...

Embodiment 3

[0052] 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 36g / L sodium metaaluminate solution and mixed solution A are added into the reaction tank in parallel flow, the gelling temperature is kept at 50°C, the pH value is controlled at 7.9 during the co-current gelling reaction process, and the gelling time is controlled at 1.0 hour , Generate slurry I containing nickel, tungsten, and aluminum precipitates. The obtained precipitate slurry I was aged under stirring, the stirring speed was 220 rpm, the aging temperature was 72° C., the aging pH value was controlled at 6.9, ...

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PUM

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Abstract

The invention discloses a method for preparing a hydrofining catalyst. According to the hydrofining catalyst, firstly, a mixed solution A containing Ni and W and a sodium metaaluminate alkaline solution react in a parallel flow manner, obtained slurry is aged, then, a mixed solution B containing W, Mo and Al components and ammonia water are added to the aged slurry in a parallel flow manner, agingis performed, then, first drying, forming and second drying are performed, treatment is performed with a mixed aqueous solution of aluminum salt and organic acid, washing, third drying, calcination and other steps are performed, and the hydrofining catalyst is prepared. The catalyst can be applied to super deep hydrodesulfurization and hydrodenitrification reactions of diesel fractions, has higher hydrodesulfurization and hydrodenitrification reaction activity and is particularly applied to tretament of diesel materials with high nitrogen and sulfur content.

Description

technical field [0001] The invention relates to a method for preparing a hydrorefining catalyst, in particular to a method for preparing a bulk phase hydrorefining 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 product. ...

Claims

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Application Information

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IPC IPC(8): B01J23/888B01J27/051B01J37/20B01J35/10C10G45/08
CPCB01J23/002B01J23/8885B01J27/0515B01J35/1019B01J35/1038B01J37/20B01J2523/00C10G45/08C10G2300/202C10G2300/307C10G2400/04B01J2523/31B01J2523/68B01J2523/69B01J2523/847B01J2523/48
Inventor 王海涛刘东香徐学军王继锋冯小萍
Owner CHINA PETROLEUM & CHEM CORP
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