Method for preparing catalyst with non-uniform distribution of active metal component

A non-uniform distribution and active metal technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve the problems of long production process and achieve simplification of preparation methods, The effect of high hydrodemetallization activity and good metal performance

Inactive Publication Date: 2009-06-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a new and simpler method for preparing catalysts with non-uniform distribution

Method used

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  • Method for preparing catalyst with non-uniform distribution of active metal component
  • Method for preparing catalyst with non-uniform distribution of active metal component

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0024] Example 1

[0025] Weigh 1000g aluminum hydroxide powder (dry rubber powder produced by Changling Refining and Chemical Company Catalyst Plant), and extrude it into a cylindrical bar with a diameter of circumscribed circle of 1.2 mm using an extruder, and dry the wet bar at 120°C for 4 hours, 900°C After calcining for 4 hours, the alumina carrier obtained is denoted as Z1. The water absorption rate was determined to be 1.04 ml / g.

[0026] Weigh 200g of carrier Z1, add the above substances to deionized water in the order of tartaric acid, ammonium paramolybdate, and nickel nitrate. The ratio of the moles of tartaric acid to the sum of the moles of ammonium paramolybdate and nickel nitrate is 0.2. (Containing 25% NiO) is 8.83g, ammonium molybdate (containing MoO 3 82%) is 20.2g, 209ml of deionized water is added, and the mixture is stirred until it is completely dissolved to obtain an immersion solution. After mixing uniformly, measure the pH value of the immersion liquid wit...

Example Embodiment

[0027] Example 2

[0028]Weigh 1000g aluminum hydroxide powder (dry rubber powder produced by Changling Refining & Chemical Company Catalyst Plant), use an extruder to form a cylindrical bar with a diameter of 1.2 mm circumscribed circle, and dry the wet bar at 120°C for 4 hours, 800°C After calcining for 4 hours, the alumina carrier obtained is denoted as Z2.

[0029] Weigh 200g with a water absorption rate of 1.04ml.g -1 Add the above-mentioned substances to deionized water in the order of citric acid, TW-20, ammonium paramolybdate, and cobalt nitrate. Among them, cobalt nitrate (containing CoO25.8%) is 10.19g, and ammonium molybdate (containing MoO 3 82%) is 22.4g. The ratio of the number of moles of citric acid to the sum of the number of moles of ammonium paramolybdate and cobalt nitrate is 0.65, and the molar ratio of the added surfactant TW-20 to the amount of citric acid is 0.4. Add 210ml of deionized water and stir evenly until completely dissolved. After mixing uniformly...

Example Embodiment

[0030] Example 3

[0031] Weigh 1000g of aluminum hydroxide powder (same as Example 1), use an extruder to form a cylindrical bar with a circumscribed circle diameter of 1.2 mm, dry the wet bar at 120°C for 4 hours, and calcinate at 600°C for 4 hours to prepare alumina The carrier is denoted as Z3.

[0032] Weigh 200g of water absorption rate of 0.96ml.g -1 Γ-Al 2 O 3 As the carrier, add the above substances to deionized water in the order of phosphoric acid, TW-80, ammonium metatungstate and nickel nitrate. Among them, nickel nitrate (containing NiO25%) is 7.23g, and the added ammonium metatungstate contains metatungstic acid. For the 8.5m% ammonium solution, the ratio of the number of moles of phosphoric acid to the sum of the number of moles of ammonium metatungstate and nickel nitrate is 0.8, and the molar ratio of the added surfactant TW-80 to the amount of phosphoric acid is 0.65. Add 204ml of deionized water until it is completely dissolved. After mixing evenly, measure the...

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Abstract

The invention relates to a method for preparing a catalyst with active metal component nonuniform distribution, which comprises the step of introducing effective quantity of at least one metal component selected from a VIII group and effective quantity of at least one metal component selected from a VIB group on a carrier by a soaking method. The method is characterized in that the soaking process comprises the following steps: firstly, mixing one or more acid selected from nitric acid, phosphoric acid, oxalic acid, citric acid, tartaric acid, pimelic acid and adipic acid, a compound of at least one metal component containing the VIB group, a compound of at least one metal component containing the VIII group, and water in sequence into a solution; secondly, using the mixed solution prepared in the first step to soak the carrier at room temperature, wherein the soaking time is between 1 and 5 hours; and thirdly, drying the carrier soaked in the second step for 2 to 10 hours at a temperature of between 60 and 160 DEG C, and roasting the soaked carrier for 2 to 5 hours at a temperature of between 400 and 600 DEG C. The method adopts the one-step soaking method to greatly simplify the preparation method of the catalyst.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a catalyst with non-uniform distribution of active metal components. Background technique [0002] Deep processing of heavy oil will help improve the utilization rate of crude oil and reduce environmental pollution. Compared with distillate oil, heavy oil contains more impurities such as asphaltenes, colloids and metals. During the hydroprocessing process, these impurities are either adsorbed on the surface of the catalyst, or deposited in the pores of the catalyst, causing the pores of the catalyst to be blocked and deactivated. Therefore, how to improve the anti-coking performance and metal-accepting performance of catalysts has become a key issue in the development of such catalysts. [0003] US4760045 provides a heavy oil hydrotreating catalyst, which contains a porous heat-resistant oxide carrier and at least one hydrogenation active metal compon...

Claims

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Application Information

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IPC IPC(8): B01J37/02B01J23/88B01J23/888
Inventor 刘佳胡大为杨清河聂红孙淑玲
Owner CHINA PETROLEUM & CHEM CORP
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