Preparation method for hydrogenation catalyst

A hydrogenation catalyst, catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. , poor strength of interaction catalyst, etc.

Active Publication Date: 2014-07-23
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high metal content of the catalyst prepared by this method, there is often a lack of sufficient interaction between the metal and alumina, resulting in poor catalyst strength
The active component part is composed of a large number of metals, and some internal metal components cannot be fully utilized during the formation of Ni-Mo or Ni-Mo-W powder, resulting in loss of activity, and this problem cannot be solved by simple bonding
[0010] CN1342102A discloses a mixed metal catalyst, which is obtained by co-precipitating three active metals. Its main disadvantage is that no coordination effect between different active metals has been found
None of the above patents deal with this

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preparation example Construction

[0024] The preparation method of hydrogenation catalyst provided by the invention, a kind of specific process is as follows:

[0025] 1. Ni x W y o z Precursor mixtures of composite oxides and alumina with MoO 3 Preparation of the mixture

[0026] Prepare a salt mixed solution A containing active metal Ni, W component, aluminum and additives. The nickel-containing salt can be one or more of nickel sulfate, nickel nitrate, nickel chloride, etc. The tungsten-containing salt can be one or more of sodium tungstate, ammonium metatungstate and the like. The aluminum-containing salt may be one or more of aluminum chloride, aluminum nitrate, aluminum sulfate, and the like. Auxiliaries generally include one or more of P, F, Ti, Si, B, Zr, etc. Alkaline solution B containing aluminum is prepared, and the alkaline solution containing aluminum is preferably sodium metaaluminate solution. Add material A and material B concurrently into the reaction tank with clean water to form a ge...

Embodiment 1

[0035]Add 500mL of water into the dissolution tank 1, dissolve 40g of nickel chloride, then add 44g of ammonium metatungstate to dissolve, then add 26g of aluminum nitrate to dissolve, and prepare acidic working solution A. Add 500mL of water into the dissolution tank 2, then add 20g of sodium metaaluminate to dissolve, and prepare alkaline working solution B. Add 350mL of water into the reaction tank, and the temperature rises to 60°C. Under the condition of stirring, add solution A and solution B into the reaction tank concurrently to form gel, the gel forming temperature is 60°C, the gel forming time is 0.5 hour, and the pH value of the slurry during the gel forming process is 7.5. Aging for 1 hour after gel forming. Then filter, add 600ml of clean water and 18g of molybdenum trioxide to the filter cake, beat and stir evenly, filter, dry the filter cake at 80°C for 5 hours, then extrude into strips, wash with clean water for 3 times, and dry the wet strips at 120°C for 5 h...

Embodiment 2

[0037] According to the method of Example 1, according to the component content ratio of catalyst B in Table 1, nickel chloride, ammonium metatungstate, aluminum nitrate and zirconium oxychloride were added to the dissolution tank 1 to prepare acidic working solution A. Add sodium metaaluminate to dissolving tank 2 to prepare alkaline working solution B. Add 350mL of water into the reaction tank, and the temperature rises to 40°C. Under the condition of stirring, add solution A and solution B into the reaction tank concurrently to form gel, the gel forming temperature is 40°C, the gel forming time is 2 hours, and the pH value of the slurry during the gel forming process is 8.0. Aging for 2 hours after gel forming. Then filter, wash the filter cake twice with 500mL of clean water, add clean water and molybdenum trioxide, beat and stir evenly, filter, dry the filter cake at 70°C for 7 hours, then extrude it, wash it twice with clean water, wet the bar It was dried at 100°C for...

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Abstract

The present invention discloses a preparation method for a hydrogenation catalyst. According to the method, a coprecipitation method is adopted to generate a mixture comprising a NixWyOz composite oxide and a precursor of aluminum oxide; the mixture and MoO3 are subjected to beating, mixing, filtering, shaping, drying and baking to obtain the catalyst, wherein the method for generating the NixWyOz composite oxide and the precursor of the aluminum oxide by the coprecipitation method comprises: preparing an acid mixing solution A containing Ni, W, and an aluminum salt; preparing an aluminum-containing alkaline solution B; and carrying out co-current flow of the solution A and the solution B to carry out gelling to obtain the catalyst. According to the method of the present invention, the aluminum source comprises two parts, one is the acid mixing solution A, and the other is the aluminum-containing alkaline solution B, such that the excessive growth of the grain during the precipitation forming process can be effectively controlled, the reduction of the specific surface area of the catalyst can be inhibited, and the adhesion deteriorating of the catalyst can be inhibited so as to improve the pore structure and the mechanical strength of the catalyst. The method of the present invention is mainly applicable for the preparation of the bulk phase catalysts with the high metal content, wherein the bulk phase catalysts provide high activities for the deep impurity removal process of the hydrocarbon, and can be adopted to process the heavy raw materials.

Description

technical field [0001] The present invention relates to a preparation method of a hydrogenation catalyst, especially a preparation method of a high-metal catalyst, in particular to a preparation method of a catalyst for hydroconversion or hydrotreating of hydrocarbon oil, especially for heavier Preparation method of hydrogenation catalyst for deep desulfurization, denitrogenation and other impurity removal processes of hydrocarbon oil. Background technique [0002] Impurities such as S and N in fuel oil and aromatic hydrocarbons (especially polycyclic aromatic hydrocarbons) will form harmful substances such as SOx, NOx and solid particles during use, which not only endanger human health, but also form acid rain in the air, causing greater pollution with destruction. In the past ten years, many countries including North America, Europe, and Japan have proposed the concept of ultra-low sulfur diesel oil (ULSD) and have continuously formulated new fuel specifications to limit ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888C10G45/08
Inventor 刘东香王海涛徐学军王继锋冯小萍
Owner CHINA PETROLEUM & CHEM CORP
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