Hydrocracking catalyst and preparation method thereof

A hydrocracking and catalyst technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc. Catalyst hydrocracking reaction activity, catalyst specific surface area, pore volume and pore diameter are small, etc., to achieve the effect of high pore volume, reasonable matching, and good low-temperature reaction activity

Active Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heteropoly acid used in this method is phosphotungstic acid. Since phosphotungstic acid has strong acidity and is added during the catalyst gelation process, it has a great influence on the formation of the carrier silica pore structure, resulting in the specific surface area of ​​the catalyst, the pore The volume and pore size are relatively small, which affects the hydrocracking reaction activity of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of carrier:

[0024] Prepare a mixed solution by preparing 12.8 ml of cesium carbonate solution with a concentration of 0.1 g / ml, 22 ml of basic nickel carbonate solution with a concentration of 0.5 g / ml and 19.3 ml of tartaric acid solution with a concentration of 1 g / ml, and stirring at room temperature. Then add 291 ml tetraethyl orthosilicate, stir at room temperature for 2 h, when the solution is in the form of a sol; raise the temperature to 70 °C, stir until it becomes a gel; age the gel at room temperature for 12 h, and then Dry at 110 °C for 8 h, and calcinate the obtained solid at 400 °C for 3 h to obtain the carrier;

[0025] (2) Preparation of catalyst: The catalyst is prepared by impregnation method, the steps are as follows:

[0026] Add 15.6 g of silicotungstic acid aqueous solution to the carrier, stir at 70 °C to evaporate the solution, and then dry at 110 °C for 8 h, the obtained solid is Ni-Cs 1.5 h 2.5 SiW 12 o 40 / SiO 2 Catalys...

Embodiment 2

[0029] (1) Preparation of carrier:

[0030] 22.6 ml of cesium carbonate solution with a concentration of 0.1 g / ml, 13 ml of basic nickel carbonate solution with a concentration of 0.5 g / ml and 15.4 ml of tartaric acid solution with a concentration of 1 g / ml were prepared as a mixed solution, stirred at room temperature, Then add 277 ml tetraethyl orthosilicate, stir at room temperature for 2 h, when the solution is in the form of a sol; raise the temperature to 70 °C, and stir until it becomes a gel; age the gel at room temperature for 12 h, then at 110 ℃ drying for 8 h, and the obtained solid was calcined at 400 ℃ for 3 h to obtain the carrier;

[0031] (2) Preparation of catalyst: The catalyst is prepared by impregnation method, the steps are as follows:

[0032] Add 20.8 g of silicotungstic acid aqueous solution to the carrier, stir at 70 °C to evaporate the solution, and then dry at 110 °C for 8 h, the obtained solid is Ni-Cs 2 h 2 SiW 12 o 40 / SiO 2 Catalyst, wherei...

Embodiment 3

[0035] (1) Preparation of carrier:

[0036] Prepare a mixed solution by preparing 5.7 ml of cesium carbonate solution with a concentration of 0.1 g / ml, 35 ml of basic nickel carbonate solution with a concentration of 0.5 g / ml and 20.5 ml of tartaric acid solution with a concentration of 1 g / ml, and stir at room temperature. Then add 298 ml tetraethyl orthosilicate and stir at room temperature for 2 h. When the solution is in the form of a sol; raise the temperature to 70 °C and stir until it forms a gel; age the gel at room temperature for 12 h, and then Dry at 110 °C for 8 h, and calcinate the obtained solid at 400 °C for 3 h to obtain the carrier;

[0037] (2) Preparation of catalyst: The catalyst is prepared by impregnation method, the steps are as follows:

[0038] Add 10.4 g of silicotungstic acid aqueous solution to the carrier, stir at 70 °C to evaporate the solution, and then dry at 110 °C for 8 h, the obtained solid is Ni-CsH 3 SiW 12 o 40 / SiO 2 Catalyst, wherei...

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Abstract

The invention discloses a hydrocracking catalyst and a preparation method thereof. Based on the catalyst weight, the catalyst comprises 10%-20% of an acidic component, 3%-8% of a hydrogenation metal component by element, and the balance a silicon oxide carrier. The catalyst has the properties of: a specific surface area of 380-450m<2> / g, a pore volume of 0.40-0.50ml / g, and an average pore diameter of 4.2-5.2nm. In the invention, a sol-gel method is employed to prepare the catalyst carrier, and the hydrogenation metal component and an alkali metal salt are introduced in the catalyst preparation process, the carrier is immersed into a heteropolyacid solution, and after drying, the catalyst can be obtained. In the catalyst provided in the invention, the heteropolyacid salt and the hydrogenation metal component are well dispersed in the carrier and reasonably matched. And the catalyst has high specific surface area and pore volume, so that the catalyst can show good low temperature reaction activity and high liquid hydrocarbon selectivity when it is used in a hydrocracking reaction of long-chain alkanes under the circumstances of a relatively low content of the acidic component and the hydrogenation metal component.

Description

technical field [0001] The invention relates to a hydrocracking catalyst and a preparation method thereof, in particular to a hydrocracking catalyst with high conversion rate of long-chain alkanes and high selectivity of liquid hydrocarbons and a preparation method thereof. Background technique [0002] In the oil refining industry, hydrocracking is an important process for producing high-quality light oil products from heavy oil. A transformation process of chemical reactions such as rearrangement and cleavage. The hydrocracking process can not only produce high-quality light oil products, but also has a high yield of liquid phase products. The core of its technology is the catalyst. The hydrocracking catalyst is a dual-function catalyst, which has both the acid function and the hydrogenation function. The acid function of the hydrocracking catalyst involved in US 5,536,687, US 5,447,623 and EP0028938A1 is mainly provided by molecular sieves, and the hydrogenation compone...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28C10G47/12
Inventor 金浩孙素华刘杰朱慧红杨光
Owner CHINA PETROLEUM & CHEM CORP
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