Hydrocracking catalyst, and preparation method and application thereof

A hydrocracking and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as unstable properties of heteropolyacids and insufficient catalyst stability

Active Publication Date: 2013-02-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the properties of heteropolyacids are unstable, and they will gradually decompose and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Immerse the carrier T-1 of Comparative Example 1 with the impregnation solution containing tungsten compound and nickel compound at room temperature for 2 hours, and dry it at 120°C for 4 hours to prepare a solution of ammonium dihydrogen phosphate with a concentration of 30% by weight, and dry the above The carrier was impregnated with the prepared phosphorus-containing solution for 2 hours, dried at 120°C for 4 hours, and then the impregnated carrier was reductively activated under a hydrogen atmosphere. , at a heating rate of 2°C / min, from 500°C to 750°C, and kept at 750°C for 2 hours to prepare the catalyst C-1 of the present invention.

[0050] Through XRD analysis (under nitrogen protection condition), it can be seen that there are tungsten phosphide (WP) and nickel phosphide (Ni phosphide) in the catalyst of the present invention. 2 The characteristic diffraction peak of P) forms the phosphating state of the active metal.

Embodiment 2

[0055] The carrier T-2 of Comparative Example 2 was impregnated with an impregnation solution containing tungsten and nickel at room temperature for 2 hours, and dried at 100°C for 6 hours to prepare a solution of ammonium hydrogen phosphate with a concentration of 40% by weight. The prepared phosphorus-containing solution was impregnated for 2 hours, dried at 120°C for 5 hours, and then the impregnated carrier was activated by hydrogen in a hydrogen atmosphere. Firstly, it was raised from room temperature to 300°C at 10°C / min. The temperature is 1°C / min, raised from 300°C to 600°C, and kept at 600°C for 4 hours to prepare transition metal phosphating catalyst C-2.

Embodiment 3

[0060] The carrier T-3 of Comparative Example 3 was impregnated with an impregnation solution containing tungsten and nickel at room temperature for 2 hours, and dried at 110°C for 6 hours to prepare a solution of ammonium dihydrogen phosphate with a concentration of 60% by weight. Immerse in the prepared phosphorus-containing solution for 2 hours, dry at 110°C for 5 hours, and then activate the above-mentioned impregnated carrier in a hydrogen atmosphere. First, increase the temperature from room temperature to 400°C at 8°C / min The temperature was raised from 400°C to 650°C at a rate of 1°C / min, and kept at 650°C for 4 hours to prepare transition metal phosphating catalyst C-3.

[0061] Table 1 Physicochemical properties of catalyst supports.

[0062] Numbering T-1 T-2 T-3 Molecular sieve, wt% 12.0 7.0 4.0 Amorphous silica-alumina, wt% 25.0 53.0 30.0 Macroporous alumina, wt% 43.0 20.0 46.0 Binder, wt% 20.0 20.0 20.0 Pore ​​vo...

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Abstract

The invention describes a hydrocracking catalyst, and a preparation method and an application thereof. The hydrocracking catalyst comprises an acid component and an active metal component compound, wherein the acid component comprises at least one molecular sieve; the active metal component compound comprises a compound of Mo and/or W in a VIB group and a compound of Ni and /Co in a VIII group; and in a hydrocracking reaction state, the active metal component compound in the hydrocracking catalyst is in a metal phosphatizing state. The catalyst has excellent usage performance, good catalyst activity and high selectivity for medium oil under the condition of high nitrogen content in raw oil, is suitable for hydrocracking processes for increasing jet fuels and clean diesel oil, has stronger adaptability for nitrogen, and can reduce burden of a refining catalyst.

Description

technical field [0001] The invention relates to a hydrocracking catalyst and its preparation method and application. The catalyst has excellent hydrocracking performance and hydrodewaxing performance, high medium oil selectivity, and can produce more jet fuel and diesel 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] M...

Claims

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Application Information

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IPC IPC(8): B01J29/16B01J29/78C10G47/20
Inventor 谷明镝黄薇
Owner CHINA PETROLEUM & CHEM CORP
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