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Preparation method of demetalization catalyst

A catalyst and demetallization technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem that catalyst pore volume needs to be further improved

Active Publication Date: 2020-10-27
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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  • Preparation method of demetalization catalyst
  • Preparation method of demetalization catalyst
  • Preparation method of demetalization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0036] (2) Weigh 50 grams of the above-mentioned spent catalyst and place it in 300 grams of ammonium bicarbonate aqueous solution with a concentration of 18% by mass, transfer the mixed material into an autoclave and seal it for heat treatment. The heat treatment conditions are: heating at 140°C for 6 hours, and then The powder was dried at 110°C for 6 hours. Soak in a solution of polyethylene glycol-6000 (that is, a molecular weight of 6000) with a mass percentage concentration of 25% for 1.5 hours, filter, and dry at 120°C for 6 hours to obtain pretreated material A;

[0037](3) Weigh 100 grams of pseudo-boehmite, 30 grams of pretreatment material A, and 1.5 grams of scallop powder, mix the above-mentioned materials evenly, add an appropriate amount of aqueous solution dissolved in 3 grams of acetic acid and knead them, extrude them into strips, and form them in Dry at 140...

Embodiment 2

[0039] Same as Example 1, except that the mass percent concentration of ammonium bicarbonate is 21%, the heat treatment temperature is 120°C, and the heat treatment time is 8 hours, and polyethylene glycol-2000 (that is, the molecular weight is 2000) solution is used instead, and the mass percent concentration is 30 %. The addition amount of pretreatment material A is 45 grams, makes catalyst Cat-2, and catalyst property is shown in Table 1.

Embodiment 3

[0041] Same as Example 1, except that the calcination temperature of the spent catalyst powder is 900°C. The mass percent concentration of the ammonium bicarbonate solution is 15%, the heat treatment temperature is 160°C, and the heat treatment time is 4 hours. The polyethylene glycol-12000 (that is, the molecular weight is 12000) solution is used instead, and the mass percent concentration is 20%. The addition amount of pretreatment material A is 20 grams, and the catalyst Cat-3 is obtained, and the properties of the catalyst are shown in Table 1.

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Abstract

The invention discloses a preparation method of a demetalization catalyst, and the method comprises the following steps: (1) pulverizing a waste hydrotreating catalyst, and roasting; (2) immersing thematerial obtained in the step (1) into an ammonium bicarbonate aqueous solution, carrying out sealed heat treatment, filtering, drying the material, soaking with a polyethylene glycol solution, filtering, and drying to obtain a pretreated material A; and (3) subjecting pseudo-boehmite and the pretreated material A to kneading molding, drying and roasting the molded product so as to obtain a carrier, and loading a hydrogenation active component onto the carrier so as to obtain the demetalization catalyst. According to the method, the hydrodemetallization catalyst is prepared from the waste catalyst, so that the production cost is reduced, the environmental pollution is reduced, the activity of the catalyst is guaranteed, the catalyst has good stability, and the operation period of a devicecan be prolonged.

Description

technical field [0001] The invention relates to the field of catalyst preparation, in particular to a method for preparing a hydrodemetallization catalyst. Background technique [0002] With the intensification of crude oil deterioration and heaviness, 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. The fixed bed hydrogenation technology of residual oil is an effective means to realize the efficient conversion of heavy oil. Adopting this technical route can effectively remove impurities such as metals, sulfur, nitrogen and residual carbon in residual oil, provide high-quality feed for catalytic cracking, and meet stricter environmental protection regulations while increasing production of light oil products. During the processing of heavy oil, the metal compounds in it will be decomposed, and the metal impurities will be deposited on the inner and outer sur...

Claims

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Application Information

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Patent Type & Authority Applications(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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