Hydro-denitrification catalyst and application thereof

A technology of hydrodenitrogenation and catalyst, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc. It can solve the problem of high water content, affecting production efficiency, dry basis low level problem

Active Publication Date: 2019-11-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to claim 4 in its claims, it can be seen that the method of reducing the water content of pseudo-boehmite in the preparation process or increasing the dry basis of pseudo-boehmite is through conventional drying methods, which is generally thought of but difficult to implement The method is mainly due to four aspects: First, the pseudo-boehmite that has not been completely dried has strong viscosity and is difficult to transfer, which will cause secondary dust pollution
The second is because the drying starts from the surface. Because the product is not completely dried, there is a sandwich biscuit phenomenon, that is, the surface of part of the pseudo-boehmite is dry (basically does not contain free water) and the inside is wet (free water is basically maintained before drying. state), hard particles will be formed on the dry surface. Based on the description of the patent, there is no special method to eliminate this phenomenon. The incompletely dried pseudo-boehmite is added with peptizer, binder, etc. When forming after kneading, hard particles formed durin

Method used

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  • Hydro-denitrification catalyst and application thereof
  • Hydro-denitrification catalyst and application thereof
  • Hydro-denitrification catalyst and application thereof

Examples

Experimental program
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Example Embodiment

[0071] According to the modified alumina support of the present invention, the hydrated alumina wet gel can be mixed with a compound having at least two proton acceptor sites by a conventional method. The hydrated alumina wet gel can be mixed with a compound having at least two proton acceptor sites under shear. In one embodiment, the mixing method is stirring. The hydrated alumina wet gel and the compound having at least two proton acceptor sites can be mixed uniformly by stirring in a container with a stirring device, thereby obtaining the hydrated alumina composition according to the present invention. The stirring can be carried out in a container with a stirring device or in a beater. In another embodiment, the mixing method is kneading. The hydrated alumina wet gel and the compound having at least two proton acceptor sites can be kneaded in a kneader to obtain the hydrated alumina composition according to the present invention. The type of the kneader is not particular...

Example Embodiment

[0164] Preparation Example 1

[0165] Take the pseudo-boehmite wet cake (wet filter cake number SLB-1) produced by the sodium aluminate-aluminum sulfate method of Changling Branch of Catalyst, and the i value of the wet cake is determined 78.2%.

[0166] Take 200g of wet filter cake SLB-1, add 5g methylcellulose and 3g sesame powder containing 80% galactomannan, stir for 10min, and let stand for 30min to obtain hydrated alumina composition JF-1. The value is 3.03.

[0167] The hydrated alumina composition JF-1 was extruded on a laboratory F-26 type twin-screw extruder (manufactured by South China University of Technology, the same below) using a Φ1.4mm butterfly-shaped orifice plate. The wet bar was dried at 120°C for 3 hours and calcined at 980°C for 3 hours. The radial crushing strength of the obtained alumina molded body Z-1 was 11.2N / mm, the water absorption rate was 1.19, and its bimodal pores were analyzed by mercury intrusion. The possible pore diameters of the pore distrib...

Example Embodiment

[0168] Preparation Example 2

[0169] Take about 5Kg of the wet filter cake SLB-1 in Preparation Example 1, add about 500g of water to make a slurry for 1 min, then press the slurry into the plate frame, adjust the pressure of the plate frame to 0.7Mpa, squeeze the moisture, and hold for 15 minutes to obtain a filter cake of 2.6 Kg (filter cake number LB-1), the i value of the filter cake was determined to be 62%.

[0170] Take 300g of filter cake LB-1, add 4.5g of hydroxyethyl methylcellulose and 1.5g of sesame powder (85% galactomannan), and mix them to obtain the hydrated alumina composition JT-2. The value is 1.60.

[0171] The hydrated alumina composition JT-2 was formed on the laboratory F-26 twin-screw extruder using a Φ1.4mm circular orifice plate, the extrusion was smooth, and a smooth cylindrical strip without burrs was obtained, and dried at 150°C After 2 hours, calcined at 700°C for 3 hours, the alumina molded body Z-2 was obtained. The single-peak pore distribution of ...

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Abstract

The invention relates to a hydro-denitrification catalyst and application thereof. The hydro-denitrification catalyst is prepared from a modified alumina support and a hydro-denitrification active metal component loaded in the modified alumina support; the modified alumina support is granular and is prepared by forming and modifying a hydrated alumina composition; the hydrated alumina compositioncontains hydrated alumina and a compound with at least two proton acceptor sites, and the value of the composition is less than 5. The hydro-denitrification catalyst has good hydro-denitrification effect.

Description

technical field [0001] The invention relates to a hydrodenitrogenation catalyst and its application. Background technique [0002] The fixed-bed residual oil hydrogenation catalyst adopts a graded system, mainly including protective agent, demetallization agent, desulfurization agent, denitrification agent, carbon residue removal agent, etc. With the continuous construction of residual oil hydrogenation units such as Sinopec Yanjiang Refinery and PetroChina North China Branch, the processing raw materials will be mainly based on low-sulfur and high-nitrogen residual oil such as Shengli Pipeline Crude Oil or North China Crude Oil. Compared with the high-sulfur residual oil in the Middle East, the characteristics of this type of residual oil raw material are: low sulfur content (0.2%-2.5%), high nitrogen content (0.3%-0.7%), high colloid content, low asphaltene content, High nickel content, low vanadium content. Compared with the high-sulfur and low-nitrogen residual oil in ...

Claims

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Application Information

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IPC IPC(8): B01J23/882B01J23/883B01J37/02C10G45/08
CPCB01J23/883B01J37/024B01J23/882C10G45/08C10G2300/202
Inventor 贾燕子杨清河刘学芬曾双亲邵志才刘涛
Owner CHINA PETROLEUM & CHEM CORP
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