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Preparation method for metal phosphide type hydrocracking catalyst

A metal phosphide and hydrocracking technology, which is applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of unstable properties of heteropolyacids and insufficient stability of catalysts, etc.

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 transform under high temperature conditions, and the stability of the catalyst is insufficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Prepare an impregnation solution with a weight concentration of 30% ammonium dihydrogen phosphate, tungsten and nickel, impregnate the carrier T-1 of Comparative Example 1 with the prepared impregnation solution for 2 hours, dry at 120°C for 4 hours, and then place it under a hydrogen atmosphere. Reduction activation, the reduction activation procedure is to rise 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 the temperature at 700°C for 2 hours to prepare the catalyst of the present invention C-1.

[0037] 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

[0042] Prepare an impregnating solution with a weight concentration of 40% ammonium dihydrogen phosphate and containing tungsten and nickel, impregnate the carrier T-2 of Comparative Example 2 with the prepared impregnating solution for 2 hours, dry at 100°C for 6 hours, and then in a hydrogen atmosphere Activation of hydrogen at 10°C / min from room temperature to 350°C at 1°C / min, from 350°C to 600°C at a rate of 1°C / min, and at 600°C for 4 hours to prepare transition metal phosphides Catalyst C-2.

Embodiment 3

[0047] Prepare an impregnating solution with a weight concentration of 40% ammonium hydrogen phosphate and containing tungsten and nickel, impregnate the carrier T-3 of Comparative Example 3 with the prepared impregnating solution for 2 hours, dry at 110°C for 6 hours, and then place it in a hydrogen atmosphere. For activation treatment, 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 a phosphating transition metal catalyst C-3.

[0048] Table 1 Physicochemical properties of catalyst supports.

[0049] 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 ​​volume, ml / g 0.73 0.76 0.78 Specific surface area, m 2 / g 425 392 383

[0050] Table 2 Catalyst composition and pr...

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Abstract

The invention describes a preparation method of a metal phosphide type hydrocracking catalyst. The method comprises the following steps of (1) preparing a catalyst carrier containing a molecular sieve and an inorganic refractory oxide; (2) preparing a dipping solution containing a VIB group metallic compound, a VIII group metallic compound and an inorganic phosphorus-containing compound; (3) dipping the catalyst carrier obtained for the step (1) with the dipping solution prepared by the step (2), and then drying the dipped material; and (4) performing hydrogen activation on the material obtained from the step (4), obtaining the hydrocracking catalyst used for hydrocracking reactions after the activation. The hydrocracking catalyst prepared by the method has outstanding usage performance, and is particularly suitable for a hydrocracking process of increasing 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 Applications(China)
IPC IPC(8): B01J29/26B01J29/78C10G47/20
Inventor 谷明镝黄薇
Owner CHINA PETROLEUM & CHEM CORP
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