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A kind of preparation method of carbon-containing alumina carrier

A technology of alumina carrier and carbon alumina, applied in catalyst carrier, chemical instrument and method, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of reducing pore volume and macropore content, and the interaction needs to be further Improvement, collapse, etc.

Active Publication Date: 2019-10-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the molding process of the alumina carrier, it is necessary to knead pseudo-boehmite dry rubber powder, extrusion aids, peptizers, etc. The macropores of the body itself partially collapse, so that the pore volume and macropore content of the final carrier are greatly reduced
In addition, the interaction between the alumina carrier and the active component prepared by the prior art needs to be further improved

Method used

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  • A kind of preparation method of carbon-containing alumina carrier
  • A kind of preparation method of carbon-containing alumina carrier
  • A kind of preparation method of carbon-containing alumina carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 200 g of pseudo-boehmite (produced by Shandong Aluminum Co., Ltd.) and place it in a beaker, add 400 mL of xylitol aqueous solution with a mass concentration of 25% to the beaker and soak for 4 hours. The impregnated material is filtered, and the filter cake is transferred to a high-pressure reactor for carbonization treatment at a temperature of 140°C and a treatment time of 10 hours. The treated pseudo-boehmite is fully mixed with 4g of scallop powder, and an appropriate amount of aqueous solution dissolved in 2g of acetic acid is added to the above materials, mixed evenly, and extruded into cylindrical strips. The molded wet material was dried at 110°C for 8 hours and calcined at 600°C for 8 hours to obtain an alumina carrier.

[0031] Weigh 100 grams of the above-mentioned γ-phase cylindrical strip-shaped alumina carrier and put it into the spray rolling pot, and in the rotating state, spray and impregnate 25 ml of xylitol aqueous solution with a mass concentr...

Embodiment 2

[0033] Same as Example 1, except that pseudo-boehmite was impregnated with a mixed aqueous solution of sorbitol and mannitol with a mass concentration of 40% and a mass ratio of 1:1 for 3 hours. The carbonization treatment temperature is 130°C, and the treatment time is 14 hours. The alumina carrier is in the shape of clover strips. For the first spray and impregnation, use 30ml of an aqueous solution of sorbitol with a mass concentration of 30%, and for the second spray and impregnation, use 50ml of an aqueous solution of sorbitol with a mass concentration of 10%. 20ml of sorbitol aqueous solution with a mass concentration of 5% was used for the first spraying and impregnation, the temperature during carbonization treatment was 200°C, and the carbonization time was 8 hours. The alumina carrier S2 of the present invention was obtained, and the properties of the carrier are shown in Table 1.

Embodiment 3

[0035] Same as Example 1, except that pseudoboehmite was impregnated for 5 hours with a mixed aqueous solution of glucose and ribose with a mass concentration of 30% and a mass ratio of 1:1. The carbonization treatment temperature is 120° C., and the carbonization treatment time is 16 hours. Adopt four times of spray impregnation, use 20ml mass concentration to be the aqueous solution of mannitol of 50% when spraying and impregnating for the first time, use 40ml mass concentration to be the aqueous solution of sorbitol of 30% when spraying and impregnating for the second time, the third time Use 20ml of an aqueous solution of sorbitol with a mass concentration of 20% for spray impregnation, and use 20ml of an aqueous solution of sorbitol with a mass concentration of 10% for the fourth spray and impregnation. During the carbonization treatment, the temperature was 240° C., and the carbonization time was 12 hours. The alumina carrier S3 of the present invention was obtained, an...

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Abstract

The invention provides a preparation method of a carbon-containing alumina carrier. The preparation method comprises the following contents: (1) dipping pseudo-boehmite dry glue powder into a water solution containing polyols and / or carbohydrates, carrying out hydrothermal carbonization treatment on the dipped material, and molding, drying and roasting the treated pseudo-boehmite to obtain an alumina carrier; (2) preparing at least two polyol and / or monosaccharide water solutions of different concentration, spraying the water solutions to the alumina carrier obtained in the step (1) according to the concentration order from high to low; and (3) carrying out hydrothermal carbonization treatment on the alumina carrier dipped in the step (2) in a closed container and then carrying out drying treatment to obtain the carbon-containing alumina carrier. The alumina carrier prepared through the method has relatively large pore volume and pore diameter, the carbon content is in gradient distribution in the radial direction of the carrier, and the carrier is suitable for the field of preparation of heavy oil or residual oil hydrodemetallization catalysts.

Description

technical field [0001] The invention relates to a preparation method of an alumina support, in particular to a preparation method of a carbon-containing alumina support. 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. The pore structure of the catalyst is determined by the carrier that constitutes the catalyst. Therefore, the preparation of a carrier with a larger pore volume and larger pore diameter is an important step in the prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J21/18B01J21/04B01J23/883
CPCB01J21/04B01J21/18B01J23/002B01J23/883B01J2523/00B01J35/635B01J35/647B01J35/615B01J2523/31B01J2523/68B01J2523/847
Inventor 佟佳吕振辉
Owner CHINA PETROLEUM & CHEM CORP
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