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A kind of preparation method of demetallization catalyst

A catalyst and demetallization technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve the problem that the pore volume of the catalyst needs to be further improved, so as to facilitate mass transfer and diffusion, reduce production costs, and reduce environmental pollution

Active Publication Date: 2022-06-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method utilizes spent catalysts to prepare new hydrotreating catalysts, the pore volume of the catalysts needs to be further improved.

Method used

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  • A kind of preparation method of demetallization catalyst
  • A kind of preparation method of demetallization catalyst
  • A kind of preparation method of demetallization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Take the waste catalyst pulverized to more than 230 mesh and roast it at 750 °C for 8 hours;

[0036] (2) Weigh the above waste catalyst 50 grams placed in 300 grams of mass percentage concentration of 18% ammonium bicarbonate aqueous solution, the mixed material into an autoclave seal heat treatment, heat treatment conditions: 140 °C heating for 6 hours, and then the powder at 110 °C drying for 6 hours. With a mass percentage concentration of 25% polyethylene glycol-6000 (i.e., molecular weight of 6000) solution soaked for 1.5 hours, filtered, dried at 120 °C for 6 hours, to prepare pretreatment material A;

[0037] (3) Weigh 100 grams of pseudo-thin bauxite, pretreated material A 30 grams, Tian Jing powder 1.5 grams, mix the above physics evenly, add an appropriate amount of aqueous solution dissolved in 3 grams of acetic acid to knead, extrude molding, the mold was dried at 140 °C for 6 hours, 700 °C was roasted in air for 5 hours, and the carrier was prepared with M...

Embodiment 2

[0039] As in Example 1, only the mass percentage concentration of ammonium bicarbonate is 21%, the heat treatment temperature is 120 ° C, the heat treatment time is 8 hours, and polyethylene glycol -2000 (i.e., the molecular weight is 2000) solution, the mass percentage concentration is 30%. The amount of pretreated material A was 45 grams, and the catalyst Cat-2 was prepared, and the properties of the catalyst were shown in Table 1.

Embodiment 3

[0041]As in Example 1, the roasting temperature of the waste catalyst powder is 900 ° C. The mass percentage concentration of ammonium bicarbonate solution is 15%, the heat treatment temperature is 160 °C, the heat treatment time is 4 hours, and the polyethylene glycol-12000 (that is, molecular weight is 12000) solution is switched to a mass percentage concentration of 20%. The pretreatment material A was added in an amount of 20 grams to obtain cat-3 catalyst, and the properties of the catalyst were shown in Table 1.

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Abstract

The invention discloses a preparation method of a demetallization catalyst, which comprises the following contents: (1) crushing the waste hydrogenation treatment catalyst, and then roasting; (2) immersing the material obtained in step (1) into an aqueous solution of ammonium bicarbonate and sealing Heat treatment, filtration, and drying of the material, then soaking in polyethylene glycol solution, filtering, and drying to obtain pretreatment material A; (3) kneading pseudo-boehmite and pretreatment material A to form, and drying and roasting Finally, a carrier is obtained, and the hydrogenation active component is loaded on the carrier to obtain a demetallization catalyst. The method utilizes waste catalysts to prepare hydrodemetallization catalysts, which reduces production costs and reduces environmental pollution. The hydrodemetallization catalysts not only ensure the activity of the catalysts, but also make the catalysts have good stability, which can prolong the operation period of the device. .

Description

Technical field [0001] The present invention relates to the field of catalyst preparation, specifically to a method for preparing a hydrodemetallic catalyst. Background [0002] With the intensification of crude oil inferiority and heavy quality, the efficient conversion of heavy oil and the improvement of the yield of light oil products have become an important trend in the development of refining technology. Residual oil fixed bed hydrogenation technology is an effective means to achieve efficient conversion of heavy oil. The use of this technology route can effectively remove impurities such as metals, sulfur, nitrogen and residual carbon in the residual oil, providing high-quality feed materials for catalytic cracking, and meeting stricter environmental regulations while increasing the production of light oils. In the process of heavy oil processing, the metal compounds in it will decompose, and the metal impurities will be deposited on the inner and outer surfaces of the cat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/883B01J23/94B01J35/10B01J37/02C10G45/08
CPCB01J23/883B01J23/94B01J37/0201C10G45/08C10G2300/701C10G2300/205C10G2300/202C10G2300/206C10G2300/1077B01J35/394B01J35/615B01J35/635Y02P20/584
Inventor 季洪海凌凤香王少军张会成沈智奇
Owner CHINA PETROLEUM & CHEM CORP
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