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Charcoal-containing alumina support and preparation method therefor

A technology of alumina carrier and nitrogen compound, applied in catalyst carrier, chemical instrument and method, chemical/physical process, etc., can solve the problems of small pore volume, unsuitable for hydrotreating catalyst carrier, etc., achieve uniform crystal phase, improve Pore ​​structure, favorable effect of diffusion

Active Publication Date: 2019-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The modified carbon-coated alumina carrier has high specific surface area and high mechanical strength, but its pore volume is small, and the pore size distribution is more concentrated in 3-10nm, so it is not suitable for use as a catalyst carrier for hydroprocessing of heavy oil or residual oil

Method used

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  • Charcoal-containing alumina support and preparation method therefor
  • Charcoal-containing alumina support and preparation method therefor
  • Charcoal-containing alumina support and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 200g of pseudoboehmite dry rubber powder (produced by Wenzhou Jingjing Alumina Co., Ltd., with an alumina dry basis content of 70wt%) and place it in a round-bottomed flask, add 600 grams of deionized water to the flask for beating, and add to the above slurry Add an appropriate amount of mixed acid solution with a molar concentration of nitric acid of 3 mol / L and a molar concentration of acetic acid of 1 mol / L, control the pH value of the slurry to 3 and heat and reflux at 40°C for 3 hours. The above slurry was transferred into an autoclave, 14 g of urea was added to the mixed material, and the autoclave was sealed and heat treated at 140° C. for 6 hours. After cooling to room temperature, the mixed slurry was filtered, washed, and dried at 120° C. for 8 hours to obtain treated pseudo-boehmite.

[0034]Weigh 135 grams of the above-mentioned treated pseudo-boehmite and mix them with 4 grams of carbon black powder evenly, add an appropriate amount of aqueous soluti...

Embodiment 2

[0038] With embodiment 1, just the add-on of deionized water is 1400 grams. In the mixed acid solution, the molar concentration of sulfuric acid is 4mol / L, the molar concentration of oxalic acid is 1mol / L, the pH value of the slurry is controlled to be 2, the temperature of heating and reflux is 30°C, and reflux is performed for 5 hours. The addition amount of urea is 21 grams, and hydrothermal treatment temperature is 120 ℃, and hydrothermal treatment is 8 hours. Xylitol is changed into glucose, and the consumption of solution is 30ml, and the concentration of glucose solution is 50wt%, and output power is 700W during microwave treatment, and processing time is 100s, makes carbon-containing macroporous alumina carrier A2 of the present invention, and the property of carrier sees Table 1.

Embodiment 3

[0040] With embodiment 1, just add 1.0 gram sodium tetraborates in the mixed material while adding urea. The charcoal-containing macroporous alumina carrier A3 of the present invention was obtained, and the properties of the carrier are shown in Table 1.

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Abstract

The invention discloses a charcoal-containing alumina support and a preparation method therefor. The method comprises the following steps: (1) mixing pseudo-boehmite with water, carrying out pulping,adding a mixed acid solution of organic acid and inorganic acid, and carrying out heated refluxing treatment; (2) adding an alkaline nitrogen containing compound into the step (1), carrying out sealedhydrothermal treatment, and subjecting the slurry subjected to the hydrothermal treatment to washing and drying; (3) subjecting a physical pore-enlarging agent and the material obtained in the step (2) to kneading forming, and subjecting the formed substance to drying and roasting, so as to obtain an alumina support; (4) subjecting the alumina support obtained in the step (3) to imbibition with apolyol and / or monosaccharide containing solution, and carrying out drying and roasting; and (5) carrying out microwave treatment on the material obtained in the step (4). The charcoal-containing alumina support prepared by the method is suitable for serving as a hydrotreating support for heavy oil and residual oil, particularly a hydrodemetalization catalyst support, and a hydrodemetalization catalyst prepared from the hydrodemetalization catalyst support not only has relatively high hydrodemetalization activity, but also has good stability.

Description

technical field [0001] The invention relates to an alumina carrier and a preparation method thereof, in particular to a carbon-containing alumina carrier suitable for hydrogenation treatment of heavy oil and residual oil and a preparation method thereof. Background technique [0002] At present, in the production process of heavy oil hydrodemetallization, because the raw oil contains a certain amount of impurities such as vanadium, sulfur, arsenic, nickel, etc., it is easy to form deposits, thereby blocking the pores of the catalyst, resulting in a rapid decline in catalyst activity, and even Inactivation affects industrial applications. Catalysts with larger pore volume and larger pore diameter have strong metal and carbon storage capacity, which can slow down the deactivation of the catalyst and prolong the operation period of the catalyst. As a commonly used catalyst carrier in the petrochemical industry, alumina has always been the most widely used and used catalyst car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J32/00C10G45/04
CPCB01J21/18C10G45/04C10G2300/202
Inventor 季洪海王少军凌凤香张会成沈智奇杨卫亚郭长友王丽华
Owner CHINA PETROLEUM & CHEM CORP
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