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Preparation of hydrogenation catalyst

A technology of catalysts and oxides, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. It can solve problems such as coordination and coordination of different metals not involved, high metal content of catalysts, loss of activity, etc.

Active Publication Date: 2008-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • 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
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
In the prior art, only the types and contents of metals are emphasized, and how to improve the coordination and cooperation between different metals is not involved

Method used

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  • Preparation of hydrogenation catalyst
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preparation example Construction

[0019] The invention provides the preparation method of catalyst, a kind of concrete process step is as follows:

[0020] 1. Ni x W y o z Complex oxide precursors and MoO 3 Preparation of the mixture

[0021] Prepare a mixed salt solution A containing active metal Ni, W components and additives according to the content ratio of the catalyst components. The nickel-containing salt can be nickel sulfate, nickel nitrate, nickel chloride, etc. The tungsten-containing salt can be sodium tungstate, ammonium metatungstate, etc. Auxiliaries generally include one or more of P, F, Ti, Si, B, Zr, etc. An aluminum-containing alkaline mixed solution B is prepared according to the content ratio of the catalyst components, and the aluminum-containing alkaline mixed solution is sodium metaaluminate solution. Add material A and material B concurrently into a reaction tank with clean water to form a gel. The gelation temperature is 30-80°C. In order to ensure that the composition of the ca...

Embodiment 1

[0032] Add 500mL of water into the dissolution tank 1, dissolve 40g of nickel chloride, then add 44g of ammonium metatungstate to dissolve, and prepare acidic working solution A. Add 500mL of water into the dissolution tank 2, then add 30g 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 in parallel 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 8.0. 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 hours , and calcined at 500°C for 4 hours to o...

Embodiment 2

[0034] According to the method of Example 1, according to the composition ratio of the catalyst B in Table 1, nickel chloride, ammonium metatungstate and zirconium oxychloride were added into the dissolution tank 1 to prepare the 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 in parallel to form a 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 8.5. 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 8 hours and ...

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Abstract

The invention relates to a preparation method of a catalyst composition. The precursor of NixWyOz composite oxide is generated by co-precipitation method, and then mixed with MoO3, filtered, shaped and activated to become the final catalyst. The method for generating the precursor of the NixWyOz composite oxide by the co-precipitation method is: preparing the salt mixed solution A containing active metal Ni, W components and additives according to the ratio of catalyst components. Sodium metaaluminate solution B is prepared according to the proportion of catalyst components. Solution B and solution A flow into a reaction tank equipped with clean water to form a gel, and a gel-like mixture is formed, which is the precursor of the composite oxide NixWyOz. The catalyst metal prepared by the method of the invention is evenly dispersed and has high performance, especially higher activity for the process of deeply removing impurities of hydrocarbons. Moreover, the method of the invention is simple and convenient, and the metal loss rate is low. The method of the invention is mainly used for preparing bulk phase catalysts with higher metal content.

Description

technical field [0001] The present invention relates to a preparation method of a catalyst composition, in particular to a preparation method of a bulk catalyst composition, in particular to a preparation method of a bulk catalyst for hydroconversion or hydrotreating of hydrocarbon oil, in particular The invention relates to a method for preparing a bulk catalyst for deep desulfurization, denitrogenation and other impurity removal processes of hydrocarbon oil. Background technique [0002] Fuel contains S, N and other impurities and aromatics (especially polycyclic aromatics), which 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 and destruction. In the past ten years, many countries including North America, Europe, and Japan have proposed the concept of ultra-low sulfur diesel (ULSD) and continuously formulated new fuel specifications to limit t...

Claims

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Application Information

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IPC IPC(8): B01J37/03B01J37/08B01J23/888C10G45/08
Inventor 徐学军王继锋刘东香王海涛冯小萍
Owner CHINA PETROLEUM & CHEM CORP
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