Preparation method of hydrotreating catalyst

A technology of hydrogenation treatment and catalyst, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve problems such as difficult large-scale industrialization, high cost, and complicated preparation process, and improve the utilization rate , improve performance, simple process effect

Active Publication Date: 2011-01-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing carbon coating method has a complicated preparation ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This example introduces the preparation of catalyst carrier by pseudo-boehmite dry rubber powder. Dry rubber powder specific surface 370m 2 / g, the pore volume is 0.90ml / g.

[0033] Weigh 300g of dry rubber powder, add 100g of SB powder, add 6g of citric acid and 6 g of safflower powder, mix well, add 345g of acidic solution, HNO in the acidic solution 3 The concentration is 1.74%, and the rest is distilled water. After rolling for 20 minutes, extrude the strips with a clover orifice plate with a diameter of 1.7mm. After drying at 120°C for 4h, calcining at 500°C for 3h, the prepared catalyst support is designated as S1. The carriers used in the following examples and comparative examples were all prepared by this method.

Embodiment 2

[0035] This example introduces the preparation method of Mo and Ni-based catalysts.

[0036] Impregnate S1 with an impregnating solution containing Mo, Ni, P, and ethylene glycol. The molar ratio of ethylene glycol to the total atoms of Mo and Ni in the final catalyst is 0.1:1. After the sample is left for 2 hours, it is vacuum-dried at 50°C for 4 hours. , and then raised the temperature to 200° C. in 5 minutes, and treated it in an air atmosphere for 2 hours, and the obtained catalyst was designated as A.

[0037] S1 was impregnated with an equal volume of impregnating solution containing Mo, Ni, P, glycerol and mercaptopropionic acid. The molar ratio of glycerol, mercaptopropionic acid to the final catalyst Mo and Ni content in the solution was 0.1:0.1:1, and the sample was placed After 4 hours, under a nitrogen atmosphere, the temperature was raised from room temperature to 350°C in 10 minutes, and the temperature was kept constant for 3 hours. The obtained catalyst was des...

Embodiment 3

[0040] This example introduces the preparation method of W and Ni-based catalysts.

[0041] S1 was impregnated with an equal volume of impregnation solution containing W, Ni and nitrilotriacetic acid. The molar ratio of nitrilotriacetic acid to the final catalyst W and Ni content was 0.2:1. After the sample was left for 5 hours, it was dried in an air atmosphere at 100°C for 4 hours. It took 10 minutes to raise the temperature to 400°C and keep the temperature constant for 1 hour. The obtained catalyst was designated as D.

[0042] Impregnate S1 with an impregnation solution containing W, Ni, citric acid and ethylene glycol in equal volumes, the molar ratio of citric acid, ethylene glycol to the final catalyst W and Ni content in the solution is 0.02:0.2:1, and the carbon dioxide atmosphere is at 80 °C Dry for 6 hours, heat up to 300°C in 10 minutes, and keep the temperature constant for 1.5 hours. The obtained catalyst is designated as E.

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Abstract

The invention discloses a preparation method of a hydrotreating catalyst, comprising the following steps: (1) preparing a carbon precursor and Group-VIB and/or Group-VIII active metal components into impregnation liquid; (2) dipping an inorganic refractory oxide support with the impregnation liquid obtained in step (1); and (3) carrying out thermal treatment on the porous inorganic refractory oxide support loaded with the carbon precursor and the active metal so that the carbon precursor is decomposed into carbon to obtain the carbon-containing catalyst. In the method, the carbon precursor isintroduced during the dipping process to prepare the carbon-containing catalyst, thus simplifying preparation process of the carbon-containing catalyst, improving service performances of the catalystand particularly enhancing activity and stability of the catalyst.

Description

technical field [0001] The invention relates to a preparation method of a hydrogenation treatment catalyst, in particular to a preparation method of a carbon-containing hydrogenation treatment catalyst. Background technique [0002] Most supported catalysts are prepared by impregnation method, such as various hydrogenation catalysts. When hydrogenation catalysts are prepared by impregnation, the catalyst activity and the dispersion of active metals (such as Mo) on the surface and their relationship with the carrier (such as Al 2 o 3 ) are highly correlated. How to improve the dispersion of active metals on the surface of the support and at the same time weaken the strong metal-support interaction has become the key to the preparation of highly active hydrogenation catalysts. [0003] Most traditional hydrotreating catalysts use Al 2 o 3 As a carrier, but active Al 2 o 3 (such as γ-Al 2 o 3 ) has more Lewis acid centers, which can easily lead to coking of the catalys...

Claims

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Application Information

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IPC IPC(8): B01J23/85B01J23/652B01J21/18B01J23/888B01J23/883B01J37/02B01J37/08C10G45/08
Inventor 杨占林彭绍忠姜虹刘雪玲
Owner CHINA PETROLEUM & CHEM CORP
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