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Preparation method of middle distillate-type hydrocracking catalyst

A hydrocracking and catalyst technology, applied in the direction of 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., to reduce coking, prolong life, The effect of reducing the inactivation rate

Active Publication Date: 2015-07-22
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

[0032] Prepare dimethylhydrazine NH with a weight concentration of 30% 2 N(CH 3 ) 2 solution, impregnate the above-mentioned dried carrier T-1 with the prepared solution for 2 hours, dry at 100°C for 4 hours, then impregnate with the impregnating solution containing tungsten and nickel at room temperature for 2 hours, dry at 100°C for 4 hours, and dry in air Heat treatment at 150°C for 6 hours in the atmosphere, and then reduce and activate in the hydrogen atmosphere. The reduction and activation program is from room temperature to 450°C at a rate of 5°C / min, and from 450°C to 500°C at a heating rate of 2°C / min. , and kept at 500° C. for 2 hours to prepare the catalyst C-1 of the present invention.

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 impregnated with the prepared solution for 2 hours, dried at 100°C for 5 hours, then impregnated with an impregnating solution containing tungsten and nickel at room temperature for 2 hours, dried at 100°C for 6 hours, and dried in air Heat treatment at 400°C for 1 hour in the atmosphere, and then perform hydrogen activation under the hydrogen atmosphere. Firstly, the temperature is raised from room temperature to 350°C at 10°C / min, and then from 350°C to 500°C at a heating rate of 1°C / min. And keep the temperature at 500° C. for 4 hours to prepare 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 impregnated with the prepared solution for 2 hours, dried at 110°C for 5 hours, then impregnated with an impregnation solution containing tungsten and nickel at room temperature for 2 hours, dried at 110°C for 6 hours, and dried in air Heat treatment at 350°C under atmosphere for 2 hours, and then conduct activation treatment under hydrogen atmosphere, firstly increase from room temperature to 450°C at 8°C / min, then from 450°C to 650°C at a heating rate of 1°C / min, and Keep the temperature at 650° C. for 4 hours to prepare catalyst C-3.

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Abstract

The present invention discloses a preparation method of a middle distillate-type hydrocracking catalyst. The method of the present invention includes the following steps: (1) preparing a catalyst carrier containing a molecular sieve and an inorganic refractory oxide; (2) preparing a solution containing a hydrazine derivative, dipping the catalyst carrier obtained in the step (1), and then drying the carrier; (3) preparing a dipping solution containing a VIB group metal compound and a VIII group metal compound; (4) dipping the materials obtained in the step (2) in the dipping solution prepared in the step (3), and then drying; (5) performing a heat treatment at 200-450 DEG C in the air atmosphere to the materials obtained in the step (4) for 1-6 h; and (6) activating the materials obtained in the step (5) after the heat treatment by using hydrogen, so as to obtain the hydrocracking catalyst used for the hydrocracking reaction after the activation. The hydrocracking catalyst provided by the invention is used for the treatment of heavy hydrocarbon materials, does not require prevulcanization, has low inactivation rate, and can facilitate the highest-yield production of middle distillates.

Description

technical field [0001] The invention relates to a method for preparing a hydrocracking catalyst. 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 catalysts currently used in industrial...

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 姜虹杨占林唐兆吉王继锋魏登凌温德荣
Owner CHINA PETROLEUM & CHEM CORP
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