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Preparation method for hydrocracking catalyst

A hydrocracking and catalyst technology, 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 catalyst stability.

Active Publication Date: 2014-12-31
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

[0038] The carrier T-1 of Comparative Example 1 was impregnated with an impregnation solution containing tungsten and nickel at room temperature for 2 hours, and dried at 120°C for 4 hours to prepare a solution of ammonium dihydrogen phosphate with a concentration of 30% by weight. The material was impregnated with the prepared phosphorus-containing solution for 2 hours, dried at 120°C for 4 hours, heat-treated at 250°C for 6 hours in an air atmosphere, and then reduced and activated in a hydrogen atmosphere. The reduction and activation procedure was 5°C / min from room temperature Raise to 450°C at a rate of 2°C / min, from 450°C to 700°C, and keep the temperature at 700°C for 2 hours to prepare the catalyst C-1 of the present invention.

Embodiment 2

[0043] The carrier T-2 of Comparative Example 2 was impregnated with an impregnation solution containing tungsten compound and nickel compound for 2 hours at room temperature, and dried at 100°C for 6 hours to prepare a solution of ammonium dihydrogen phosphate with a weight concentration of 40%. The carrier was impregnated with the prepared phosphorus-containing solution for 2 hours, dried at 120°C for 5 hours, heat-treated at 400°C in an air atmosphere for 1 hour, and then activated with hydrogen in a hydrogen atmosphere. First, it was raised from room temperature at 10°C / min From 350°C to 600°C at a heating rate of 1°C / min to 350°C, and kept at 600°C for 4 hours to prepare transition metal phosphide catalyst C-2.

Embodiment 3

[0048] 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 hydrogen phosphate with a weight concentration of 60%. Immerse in a good phosphorus-containing solution for 2 hours, dry at 110°C for 5 hours, heat-treat at 350°C for 2 hours in an air atmosphere, and then perform an activation treatment in a hydrogen atmosphere, first rising from room temperature to 450°C at 8°C / min , at a heating rate of 1° C. / min, from 450° C. to 650° C., and kept at 650° C. for 4 hours to prepare transition metal phosphating catalyst C-3.

[0049] Table 1 Physicochemical properties of catalyst supports.

[0050] serial number 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 ​...

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Abstract

The invention describes a preparation method for a 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 and / or a VIII group metallic compound; (3) dipping the catalyst carrier obtained from the step (1) with the dipping solution prepared by the step (2), and then drying the dipped material; (4) preparing an inorganic phosphorus-containing compound solution, dipping the material obtained from the step (3), and drying the dipped material; (5) performing heat treatment on the material obtained from the step (4) in an air atmosphere; and (6) performing hydrogen activation on the material obtained from the step (5), and 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 Patents(China)
IPC IPC(8): B01J29/78B01J29/16C10G47/20
Inventor 谷明镝黄薇
Owner CHINA PETROLEUM & CHEM CORP
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