Method for preparing hydrotreating catalyst by impregnation method

A hydrotreating and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve problems such as difficulty in realization, high initial active metal content requirements, etc., to achieve performance improvement, active metal High content and good stability

Active Publication Date: 2019-07-02
WUHAN KAIDI ENG TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when using this method to prepare impregnation solution and prepare high-load hydrogenation catalyst, the initial active metal content of impregnation solution is too high, which is difficult to achieve.

Method used

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  • Method for preparing hydrotreating catalyst by impregnation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example describes the preparation method of the carrier. Take macroporous pseudo-boehmite (Yantai Henghui Chemical Co., Ltd., specific surface area 350m2 / g, pore volume 0.92ml / g, dry basis 72.8%) 275g, add citric acid (Hubei Qibajiu Chemical Industry) 6g, field Cyanine powder (Wuhan Moxing Biotechnology Co., Ltd.) 4g, add 8.80g HNO 3 (65~68wt%), 7.2g H 3 BO 3 (99.5wt%) and 220ml H 2 O Mix the solution evenly, roll it for 20 minutes, extrude it with a clover orifice plate with a maximum distance of 1.6mm between two leaves, dry it at 120°C for 4 hours, and bake it at 500°C for 4 hours. After roasting, the carrier is denoted as Z 1 .

Embodiment 2

[0029] This example introduces the method of adding ammonium carbonate to the solution A prepared in Comparative Example 1 to adjust the pH of the impregnating solution to about 4-6. Take 50ml of solution A and put it into a beaker, slowly add ammonium carbonate (in the form of NH 3 Gauge, 40.0% by weight), control the adding speed. Measure the pH value of the solution in time with a pH meter, stop adding ammonium carbonate when the pH reaches the target value, and continue stirring until the solution is uniform and stable. In this example, a total of three solutions were prepared, the pH values ​​were adjusted to 4.10, 4.99, and 6.04 respectively, and the amounts of ammonium carbonate added were 0.38g, 0.66g, and 1.1g, and the obtained impregnating solutions were B, C, and D respectively. The concentration of each substance in the solution (the metal concentration is calculated as oxide) is: MoO 3It is 42g / ml, NiO is 7g / ml, and P is 1g / 100ml.

Embodiment 3

[0031] This example introduces the method of adding carbonate in the reaction to prepare the Mo-Ni-P impregnating solution to a pH value of about 4-6. Get 9.3g phosphoric acid (mass concentration 85.0%) and 150ml water and mix and add there-necked flask, add molybdenum trioxide (industrial grade) 105.1g and basic nickel carbonate (in terms of Ni, 44.0% by weight) 29.4g in stirring, be warming up to 40~50℃, react for 0.5h, slowly add a certain amount of ammonium carbonate (NH 3 40.0% by weight), the amount of ammonium carbonate is adjusted according to the required pH, the temperature is raised to 90-100°C, the reaction is 1h, the heating is stopped, and after cooling to room temperature, the resulting solution is filtered, and the volume is set to 250ml to obtain dark green, clear and transparent solution. In this example, a total of three solutions were prepared, the pH values ​​were adjusted to 4.07, 5.10, and 6.02 respectively, and the amount of ammonium carbonate added wa...

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Abstract

A method for preparing a hydrotreating catalyst by an impregnation method, comprising the following steps: 1) preparing an impregnating solution, which contains 10-80 g / 100 ml of a molybdenum-containing compound, calculated as MoO3, 1-15 g / 100 ml of a nickel-containing compound, calculated as NiO, 0.5-5 g / 100 ml of a phosphorus-containing compound, calculated as the P element, a carbonate with a concentration of 0-20 g / 100 ml, the pH of the solution being 2-6; 2) preparing an aluminum oxide carrier; and 3) impregnating the aluminum oxide carrier obtained in step 2) by using the impregnating solution obtained in step 1), and then drying and roasting to obtain a final hydrotreating catalyst. The specific surface area and pore volume of the hydrotreating catalyst prepared by this method are improved in different degrees, distribution of active metal on the surface of a carrier is facilitated, and the interaction force between the active metal and the carrier is uniform, so that the hydro-desulfurization and hydro-denitrification performances of the catalyst are both improved.

Description

technical field [0001] The invention relates to a hydrogenation treatment catalyst, in particular to a method for preparing the hydrogenation treatment catalyst by an impregnation method. Background technique [0002] As the quality of crude oil becomes heavier and worse year by year, environmental protection regulations are becoming stricter, and the market demand for clean oil products continues to grow, making hydrogenation technology for the production of clean fuels more and more widely used. Distillate oil hydrotreating refers to the catalytic reactions of hydrodesulfurization, hydrodenitrogenation, hydrodeoxygenation, hydrodemetallization and unsaturated hydrocarbon hydrogenation and saturation of raw oil and hydrogen on the catalyst surface under high temperature and pressure. [0003] At present, the hydrotreating catalysts used in industry are usually based on inorganic oxides (such as alumina, silica, alumina-silica, etc.) as carriers, and some hydrogenation activ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/19B01J35/10B01J37/02C10G45/08
CPCB01J27/19B01J35/1004B01J35/1033B01J37/0201C10G45/08C10G2300/202C10G2300/70
Inventor 王杰华石友良冯春峰张然许莉
Owner WUHAN KAIDI ENG TECH RES INST CO LTD
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