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Metal nitride hydrocracking catalyst, and preparation method and application thereof

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

Active Publication Date: 2014-05-14
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] With the impregnation solution of Comparative Example 1, add dimethylhydrazine NH 2 N(CH 3 ) 2 The weight concentration in the impregnating solution is 25%-45%, and the frequency is 18KHz, the power is 100W / L ultrasonic dispersion for 1 hour, and the carrier T-1 is impregnated at room temperature, and the impregnation time is 2 hours. While impregnating, ultrasonic dispersion with a frequency of 18KHz and a power of 100W / L is used, followed by drying at 120°C for 4 hours, and then reduction activation under a hydrogen atmosphere. The reduction activation procedure is to raise from room temperature to 450°C at 5°C / min, from 450°C to 500°C at a heating rate of 2°C / min, and keep the temperature at 500°C for 2 hours to prepare catalyst C-1 of the present invention .

[0032] After XRD analysis (under the condition of nitrogen protection), it can be seen that the catalyst of the present invention has the characteristic diffraction peaks of tungsten nitride and nickel nitr...

Embodiment 2

[0037] With the impregnation solution of Comparative Example 1, add dimethylhydrazine NH 2 N(CH 3 ) 2 Make the weight concentration in the impregnating solution 35%, adopt ultrasonic dispersion with a frequency of 25KHz and a power of 150W / L for 5 hours, impregnate the carrier T-2 at room temperature, and the impregnation time is 4 hours. Ultrasonic dispersion with a frequency of 25KHz and a power of 150W / L is used. After 2 hours of ultrasonic dispersion, stop the ultrasonic wave, continue to impregnate for 2 hours, dry at 100°C for 6 hours, and then perform hydrogen activation under a hydrogen atmosphere. Min was raised from room temperature to 350°C, at a rate of 1°C / min, from 350°C to 600°C, and kept at 600°C for 4 hours to prepare transition metal nitride catalyst C-2.

Embodiment 3

[0042] With the impregnation solution of Comparative Example 1, add dimethylhydrazine NH 2 N(CH 3 ) 2 The weight concentration in the impregnating solution is 45%, and the frequency is 35KHz, the power is ultrasonic dispersion of 10W / L for 7 hours, and the carrier T-3 is impregnated at room temperature for 4 hours. Ultrasonic dispersion with a frequency of 35KHz and a power of 10W / L, dried at 110°C for 6 hours, and then activated in a hydrogen atmosphere. / min, from 450°C to 650°C, and kept at 650°C for 4 hours to prepare transition metal nitride catalyst C-3.

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Abstract

The invention discloses a metal nitride hydrocracking catalyst. In terms of the weight of a catalyst carrier, the content of a molecular sieve is normally 2 to 45%, preferably, 4 to 15%; in terms of the weight of the catalyst, the content of a group VI-B metal component (in terms of the nitride of W and / or Mo) is normally 10 to 40%, preferably, 15 to 35%, most preferably, 18 to 28%, and the content of a group VIII metal component (in terms of the nitride of Ni and / or Co) is normally 1 to 10%, preferably, 2 to 9%, most preferably, 4 to 8%. The hydrocracking catalyst provided by the invention is used for treating heavy hydrocarbon materials and can realize maximum production of intermediate distillate oil.

Description

technical field [0001] The invention relates to a metal nitride type hydrocracking catalyst and its preparation method and application. The catalyst has excellent hydrocracking performance, high activity and high selectivity for medium oil. Background technique [0002] The hydrocracking catalyst is a dual-functional catalyst with hydrogenation and cracking properties. Non-precious metal hydrocracking catalysts generally use Group VIB and Group VIII metals as hydrogenation components, and the cracking performance is mainly provided by acidic components. Crystalline zeolite and / or amorphous silica-alumina can be used. Simple use of amorphous silica-alumina, although the selectivity is high, but the activity is low, and the flexibility of operation is limited. In most hydrocracking catalysts, crystalline zeolite is used as the acidic component, or crystalline zeolite and amorphous Silica and aluminum are common acidic components. [0003] Most of the medium-oil hydrocracking...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/16B01J29/78C10G47/20C10G65/12
Inventor 谷明镝白振民卜岩王刚曹春清黄薇
Owner CHINA PETROLEUM & CHEM CORP
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