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Method for preparing hydrofining catalyst

A hydrofining and catalyst technology, applied in chemical instruments and methods, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, etc. Active phase stacking layer morphology and dispersion and other issues

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 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

[0050] Nickel chloride, aluminum chloride are added into dissolving tank 1 that deionized water is housed respectively, are mixed with acidic solution A, the weight concentration of Ni in the acidic solution A is 28g / L in terms of NiO, and Al is in the form of Al 2 o 3 The weight concentration of meter is 30g / L. Ammonium metatungstate and aluminum chloride were added into the dissolving tank 2 equipped with deionized water respectively to prepare a mixed solution B. In the solution B, W was replaced by WO 3 The weight concentration of Al is 30g / L, Al is Al 2 o 3 The weight concentration of meter is 26g / L. Add deionized water into the reaction tank, and set the weight concentration as WO 3 The calculated weight concentration is 27g / L sodium tungstate alkaline solution and acidic 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 7.8 during the concurrent gelling reaction process, and the gelli...

Embodiment 2

[0052] According to the method for embodiment 1, press the component content ratio of catalyst B in table 1, add nickel chloride, aluminum chloride solution, zirconium oxychloride solution in dissolving tank 1, prepare acidic solution A, add to dissolving tank 2. Add ammonium metatungstate and aluminum nitrate to prepare mixed solution B. Add deionized water into the reaction tank, and set the weight concentration as WO 3 The calculated weight concentration is 32g / L sodium tungstate alkaline solution and acidic solution A are added into the reaction tank in parallel flow, the gelling temperature is kept at 55°C, the pH value is controlled at 7.8 during the concurrent gelling reaction process, and the gelling time is controlled At 0.8 hours, slurry I containing nickel, tungsten, aluminum, zirconium precipitates was generated. 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 contr...

Embodiment 3

[0054] According to the method of embodiment 1, press the component content ratio of catalyst C in table 1, add nickel nitrate, aluminum chloride in dissolving tank 1, prepare acidic solution A, add ammonium metatungstate, ammonium metatungstate in dissolving tank 2, Acid solution B was prepared from aluminum chloride. Add deionized water into the reaction tank, and set the weight concentration as WO 3 The calculated weight concentration is 40g / L sodium tungstate alkaline solution and acidic 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 7.7 during the concurrent gelling reaction process, and the gelling time is controlled At 1.1 hours, slurry I containing nickel, tungsten, and aluminum precipitates was formed. 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 wa...

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Abstract

The invention discloses a method for preparing a hydrofining catalyst. According to the hydrofining catalyst, firstly, an acid solution A containing Ni and Al and a sodium tungstate alkaline solutionreact in a parallel flow manner, obtained slurry is aged, an acid solution B containing W and Al components and a sodium molybdate alkaline solution are added to the aged slurry in a parallel flow manner, aging, drying, forming, calcination and other aftertreatment steps are performed, and the hydrofining catalyst is prepared. The catalyst can be applied to diesel fraction super-deep hydrodesulfurization and hydrodenitrification reactions, has higher hydrodesulfurization and hydrodenitrification reaction activity and is particularly applied to treatment 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): B01J23/888B01J35/02B01J35/10B01J37/03B01J37/20C10G45/08
CPCB01J23/8885B01J23/002B01J37/036B01J37/20C10G45/08C10G2300/202B01J2523/00B01J35/40B01J35/633B01J35/647B01J35/615B01J2523/31B01J2523/68B01J2523/69B01J2523/847
Inventor 王海涛徐学军王继锋刘东香冯小萍
Owner CHINA PETROLEUM & CHEM CORP
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