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Hydrotreating catalyst, preparation method and applications thereof

A hydrogenation treatment and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, and hydrocarbon oil treatment, etc., can solve problems such as low pH value of impregnation solution, easy aggregation of active components, and reduced catalyst reactivity

Inactive Publication Date: 2019-08-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pH value of the impregnation solution is low, and the specific surface area and pore volume of the catalyst are severely damaged. After calcination, the active components are easy to aggregate on the surface of the carrier, which reduces the reactivity of the catalyst.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The preparation method of the hydrotreating catalyst of the present invention comprises the following steps,

[0022] 1) impregnating the alumina carrier with a sulfur-nitrogen-containing organic compound solution to obtain an impregnated product;

[0023] 2) carrying out low temperature drying treatment on the dipped product obtained in step 1);

[0024] 3) After the alumina carrier after the low temperature drying treatment in step 2) is dipped in the active component solution, heat treatment is performed again,

[0025] Wherein, the temperature of the low-temperature drying treatment is 15-180°C, and the temperature of the heat treatment is 180-550°C.

[0026] According to the present invention, the alumina carrier described in step 1) can be prepared by using commercially available products or by conventional methods. The preparation process of the conventional method is preferably as follows: the large-pore alumina dry rubber powder and the small-pore alumina dry...

preparation example 1

[0047] This preparation example is used to illustrate the preparation of alumina carrier

[0048] Use pseudo-boehmite dry rubber powder to prepare catalyst precursor, weigh 220 grams of macroporous alumina dry rubber powder and 110 grams of small-pore alumina dry rubber powder, add 4 grams each of saccharin powder and citric acid, and mix well. Add an acidic solution, the concentration of nitric acid in the acidic solution is 2% by weight, and the rest is distilled water. Rolled for 15-25 minutes, extruded with clover orifice plate with a diameter of 1.7mm, dried at 120°C for 12 hours, and calcined at 550°C for 3 hours to obtain an alumina carrier, namely Z-1, whose properties are as follows: the pore volume is 0.72ml / g, the specific surface area is 342m 2 / g.

Embodiment 1

[0050] This example is used to illustrate the preparation of the hydrotreating catalyst of the present invention

[0051] Weigh 50 g of carrier Z-1, and pre-impregnate carrier Z-1 with an impregnation solution containing 2,4,6-trimercapto-s-triazine monoammonium salt, and the impregnation solution contains 2,4,6-trimercapto-s-triazine monoammonium salt. The content of azine monoammonium salt is 1% of the weight of the carrier (the concentration of 2,4,6-trimercapto-s-triazine monoammonium salt in the impregnation solution is 5% by weight). After the impregnated carrier is dried at 120°C for 3 hours, Re-immersion in an immersion liquid containing Mo, Ni, and P, and the composition of the immersion liquid is MoO 3 The content of NiO was 87.5g / 100ml, the content of NiO was 14g / 100ml, and the content of P was 2.3g / 100ml. The impregnated samples were aged at room temperature for 10 hours, and then heat-treated in an air atmosphere of 200 °C for 3 hours to obtain a hydrotreating cat...

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Abstract

The invention relates to the field of hydrotreating catalysts, and discloses a hydrotreating catalyst, a preparation method and applications thereof. The preparation method comprises: 1) impregnatingan alumina carrier with a sulfur-nitrogen-containing organic compound solution to obtain an impregnated product; 2) carrying out low-temperature drying treatment on the impregnated product obtained inthe step 1); and 3) impregnating the alumina carrier treated in the step 2) with an active component solution, and carrying out heat treatment, wherein the temperature of the low-temperature drying treatment is 15-180 DEG C, and the temperature of the heat treatment is 180-550 DEG C. According to the present invention, the catalyst prepared by the method has good matching between the dispersion degree and the sulfurization, and more active sites are generated, such that the intrinsic activity of the catalyst is easily improved; and the preparation method is simple, and the production cost islow.

Description

technical field [0001] The invention relates to the field of hydrotreating catalysts, in particular to a hydrotreating catalyst and a preparation method and application thereof. The hydrotreating catalyst is particularly suitable for hydrodenitrogenation and desulfurization of heavy distillate oil. Background technique [0002] In the process of hydrotreating, the content of impurities such as nitrogen, sulfur, oxygen and metals in crude oil continues to increase, and the degree of crude oil heaviness continues to deepen. It also emits a large amount of harmful gases such as sulfur oxides and nitrogen oxides, which endangers human health and environmental protection. It is one of the main reasons for the formation of haze weather. It has high activity, low cost and stability. The catalyst with good performance can not only ease the process conditions, but also reduce the hydrogen consumption and achieve the effect of energy saving and consumption reduction. [0003] The pro...

Claims

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Application Information

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IPC IPC(8): B01J27/186C10G45/08
CPCB01J27/186C10G45/08C10G2300/202
Inventor 姜艳张勇宋春利姚伟薛利昌
Owner CHINA PETROLEUM & CHEM CORP
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