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Preparation method for middle distillate type hydrocracking catalyst containing metal nitride

A hydrocracking and nitride technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as high reaction temperature, low activity, poor raw material adaptability, 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] Prepare dimethylhydrazine NH with a weight concentration of 30% 2 N(CH 3 ) 2 Solution, impregnate the above-mentioned dried support T-1 with the prepared solution for 2 hours, dry at 120°C for 4 hours, then impregnate with the impregnating solution containing tungsten and nickel at room temperature for 2 hours, and dry at 120°C for 4 hours, Then reduce and activate under a hydrogen atmosphere. The reduction and activation program is to rise from room temperature to 450°C at a rate of 5°C / min, and to rise from 450°C to 700°C at a heating rate of 2°C / min, and keep the temperature at 700°C for 2 hours. Catalyst C-1 of the present invention was prepared.

[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 (WN) and nickel nitride (NiN), forming the nitrided state of the active metal.

Embodiment 2

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

Embodiment 3

[0042] Prepare dimethylhydrazine NH with a concentration of 60% 2 N(CH 3 ) 2 solution, impregnating the carrier T-3 of Comparative Example 3 with the prepared solution for 2 hours, drying at 110°C for 5 hours, then impregnating with an impregnating solution containing tungsten and nickel at room temperature for 2 hours, and drying at 110°C for 6 hours, Then carry out the activation treatment under the hydrogen atmosphere, first raise from room temperature to 450°C at 8°C / min, then rise 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 Nitriding transition metal catalyst C-3.

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PUM

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Abstract

The invention discloses a preparation method for a middle distillate type hydrocracking catalyst containing metal nitride. The preparation method comprises the following steps: (1) preparing a catalyst carrier containing a molecular sieve and inorganic refractory oxide; (2) preparing a hydrazine derivative solution, dipping the catalyst carrier prepared in the step (1) in the hydrazine derivative solution and drying the catalyst carrier; (3) preparing a dipping solution containing a group VI-B metal compound and a group VIII metal compound; (4) dipping a material obtained in the step (2) in the dipping solution prepared in the step (3) and drying the material; and 5) subjecting a material obtained in the step (4) to hydrogen activation so as to obtain the hydrocracking catalyst used for a hydrocracking reaction. 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 preparation method of a medium oil type hydrocracking catalyst containing metal nitrides. The catalyst has excellent hydrocracking performance, high activity and high medium oil selectivity. 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 hydrocrac...

Claims

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Application Information

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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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