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Alumina carrier and preparation method thereof

A technology of alumina carrier and boron compound, which is used in alumina/hydroxide preparation, catalyst carrier, chemical instrument and method, etc., to achieve the effect of large pore size and pore volume, improved carrier strength and good diffusion performance.

Active Publication Date: 2020-07-17
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the present invention provides an alumina support and a preparation method thereof. The pore volume of the alumina support prepared by the method is 20-30 nm and above, and the pore volume accounts for 45-70% of the total pore volume, and the diffusion performance is good. Effectively solve the problem of diffusion and hydrogenation conversion of a large number of asphaltene macromolecules in coal tar or residual oil into the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of pseudoboehmite M. The specific surface area and pore volume of pseudo-boehmite were measured by nitrogen adsorption method, and the specific surface area of ​​M was 245m 2 / g, the pore volume is 1.4mL / g, and the most probable pore diameter is 20.8nm.

[0039] Weigh 100g of the above-mentioned pseudo-boehmite M (dry basis), add 3g of scallop powder, dissolve 1.2g of boric acid and 0.6g of polyoxyethylene ether in 110g of deionized water, add to the aforementioned materials, knead and extrude on a single screw Extruded into a cylindrical shape with a diameter of 2.5mm on the machine, dried at 105°C for 4 hours, and then calcined at 800°C for 4 hours to obtain alumina carrier A, whose properties are shown in Table 1.

Embodiment 2

[0041] Preparation of pseudoboehmite M. The specific surface area and pore volume of pseudo-boehmite were measured by nitrogen adsorption method, and the specific surface area of ​​M was 224m 2 / g, the pore volume is 1.5mL / g, and the most probable pore diameter is 19.6nm.

[0042] Weigh 100g of the above-mentioned pseudo-boehmite M (dry basis), add 3g of scallop powder and 1.0g of boron oxide, dissolve 1.7g of polyoxyethylene ether in 107g of deionized water, add to the aforementioned materials, knead and extrude in a single-screw Extruded into a clover shape with a diameter of 3.0 mm on a strip machine, dried at 120°C for 3 hours, and then calcined at 600°C for 5 hours to obtain alumina carrier B, whose properties are shown in Table 1.

Embodiment 3

[0044] Preparation of pseudoboehmite M. The specific surface area and pore volume of pseudo-boehmite were measured by nitrogen adsorption method, and the specific surface area of ​​M was 230m 2 / g, the pore volume is 1.5mL / g, and the most probable pore diameter is 19.5nm.

[0045] Weigh 100g of the above-mentioned pseudo-boehmite M (dry basis), add 3g of scallop powder, dissolve 1.6g of boric acid and 0.8g of polyoxyethylene ether in 110g of deionized water, add to the aforementioned materials, knead and extrude on a single screw Extruded into a four-leaf clover shape with a diameter of 3.0mm on the machine, dried at 110°C for 4 hours, and then calcined at 750°C for 4 hours to obtain alumina carrier C, whose properties are shown in Table 1.

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Abstract

The invention discloses an alumina carrier of a coal tar hydrogenation catalyst and a preparation method thereof. The pore volume of the carrier is 1.0-1.5 mL / g, the specific surface area of the carrier is 200-300m<2> / g, the most probable pore diameter of the carrier is 15-30nm, and the pore volume of macropores with the pore size of 20-30nm or more accounts for 45-70% of the total pore volume. The alumina carrier provided by the invention has the advantages of large pore volume, large pore diameter and excellent diffusivity, and is suitable for being used as a hydrogenation catalyst carrier for treating colloid and heavy oil with high asphaltene content.

Description

technical field [0001] The invention relates to an alumina carrier and a preparation method thereof, more specifically to an alumina carrier with a large pore diameter and a large pore volume and a preparation method thereof. Background technique [0002] Coal tar is a valuable chemical raw material obtained in the process of coal pyrolysis and gasification. With the rapid development of low-rank coal pyrolysis technology, the production of medium and low temperature coal tar has increased significantly. Medium and low temperature coal tar contains more alkanes, cycloalkanes and less condensed ring aromatics, and is suitable for the production of clean fuel oil and high value-added chemicals through hydrogenation. [0003] Residual oil is the most difficult raw material to process among petroleum-based heavy oils. It contains a large amount of colloids and asphaltenes. This part of the substance has a large molecular weight, complex structure, and difficult diffusion. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/04B01J35/10B01J37/08B01J37/00C01F7/02C01F7/30C10G45/04C04B35/10C04B35/622C04B38/06C04B38/02
CPCB01J21/04B01J37/0018B01J37/082C10G45/04C01F7/306C01F7/02C04B35/10C04B35/622C04B38/067C04B38/02C04B2235/6021C04B2235/656C04B2235/6567C04B2235/95C04B2235/96B01J35/638B01J35/647B01J35/615Y02P20/52
Inventor 马博文吴艳李文博陈贵锋毛学锋刘敏胡发亭钟金龙王吉坤
Owner CCTEG CHINA COAL RES INST
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