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Preparation method of medium oil type hydrocracking catalyst containing metal nitride

A hydrocracking, nitride technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of reduced activity, high reaction temperature, poor raw material adaptability, etc.

Active Publication Date: 2016-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this catalyst can also be used as a medium-oil type hydrocracking catalyst, due to the characteristics of the β zeolite used, the content range of β zeolite in the medium-oil type catalyst is generally limited to 2.5w%-10w%, and generally must be used together A dispersed in γ-Al 2 o 3 Such as silica-alumina on a macroporous alumina substrate, the medium-oil catalyst involved in this patent has to lower the activity in order to ensure the selectivity of medium-oil, so that the reaction temperature is relatively high, generally above 390 ° C, which leads to poor raw material adaptability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare dimethylhydrazine NH with a weight concentration of 30% 2 N(CH 3 ) 2 Solution, the above-mentioned dried support T-1 is immersed in an equal volume of the prepared solution for 2 hours, dried at 120°C for 4 hours, then immersed in an impregnation solution containing tungsten and nickel at room temperature for 2 hours, and dried at 120°C for 4 hours, Then it is reductively activated in a hydrogen atmosphere. The reductive activation procedure is to increase from room temperature to 450°C at 5°C / min, from 450°C to 700°C at a heating rate of 2°C / min, and keep at 700°C for 2 hours. The catalyst C-1 of the present invention was prepared.

[0032] Through XRD analysis (under nitrogen protection), it can be seen that the catalyst of the present invention has characteristic diffraction peaks of tungsten nitride (WN) and nickel nitride (NiN), forming a nitrided state of the active metal.

Embodiment 2

[0037] Prepare dimethylhydrazine NH with a weight concentration of 40% 2 N(CH 3 ) 2 Solution, the carrier T-2 of Comparative Example 2 was immersed in an equal volume of the prepared solution for 2 hours, dried at 120°C for 5 hours, then immersed in an impregnation solution containing tungsten and nickel at room temperature for 2 hours, and dried at 100°C for 6 hours, Then hydrogen activation is carried out in a hydrogen atmosphere. First, the temperature is increased from room temperature to 350°C at 10°C / min, and the temperature rise rate is 1°C / min, from 350°C to 600°C, and the temperature is kept at 600°C for 4 hours. Nitriding transition metal catalyst C-2.

Embodiment 3

[0042] Prepare dimethylhydrazine NH with a concentration of 60% 2 N(CH 3 ) 2 Solution, the carrier T-3 of Comparative Example 3 was immersed in an equal volume of the prepared solution for 2 hours, dried at 110°C for 5 hours, then immersed in an impregnation solution containing tungsten and nickel at room temperature for 2 hours, and dried at 110°C for 6 hours, Then it is activated in a hydrogen atmosphere, firstly at 8°C / min from room temperature to 450°C, with a heating rate of 1°C / min, from 450°C to 650°C, and constant temperature at 650°C for 4 hours. Nitriding transition metal catalyst C-3.

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Abstract

The invention discloses a method for preparing a medium-oil hydrocracking catalyst containing metal nitrides, comprising the following steps: (1) preparing a catalyst carrier containing molecular sieves and inorganic refractory oxides; (2) preparing a hydrazine derivative solution, and impregnating the catalyst carrier in step (1), and then drying; (3) preparing an impregnating solution containing a metal compound of Group VIB and a metal compound of Group VIII; (4) impregnating the material obtained in step (2) with the impregnating solution prepared in step (3), Then dry; (5) The material obtained in step (4) is activated with hydrogen, and after activation, a hydrocracking catalyst for hydrocracking reaction is obtained. The hydrocracking catalyst of the present invention is used for processing heavy hydrocarbon materials and producing middle distillates in a maximum amount.

Description

Technical field [0001] The present invention involves a preparation method of metal -containing hydrogenation catalysts containing metal nitride. This catalyst has excellent hydrogenation performance, high activity, and high selection of oil. Background technique [0002] Hydrogenation cracking catalyst is a dual -function catalyst with hydrogenation performance and cracking performance. Non -precious metal hydrogenation catalysts are generally used for hydrogenation components of ⅵB and crickets.You can choose crystal boilite and / or non -fixed silica aluminum.Simply using unspecked silicon aluminum, although the selectivity is high, but the activity is low, and the flexibility of the operation is limited. In most hydrogen -derived catalyst catalysts, crystal sheeping is acid components, or crystal shellaz and non -fixed shape.Silicon aluminum is a acid component. [0003] Most of the catalysts currently used in industrial devices are catalysts containing ampororite, and the burp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/16B01J29/78C10G47/20C10G65/12
Inventor 谷明镝王刚白振民卜岩黄薇曹春清
Owner CHINA PETROLEUM & CHEM CORP
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