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Mesoporous-macroporous composite structure alumina support and its preparation method for hydrodemetallization catalyst, and prepared catalyst

A technology of alumina carrier and macroporous alumina, applied in physical/chemical process catalysts, catalyst carriers, chemical instruments and methods, etc., can solve the problem that catalysts cannot form more macropores and mesopores, etc. Hydrodemetallization performance, the effect of prolonging the operation period

Active Publication Date: 2015-11-04
SHAANXI COAL & CHEM TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a mesoporous-macroporous composite structure alumina carrier and its preparation method for hydrodemetallization catalyst, as well as the prepared catalyst, so as to solve the problem that the catalyst made by existing pore-enlarging technology cannot form more macropores and mesopores. The purpose of the pores, and the catalyst is applied to the process of coal tar hydrodemetallization to obtain good results

Method used

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  • Mesoporous-macroporous composite structure alumina support and its preparation method for hydrodemetallization catalyst, and prepared catalyst
  • Mesoporous-macroporous composite structure alumina support and its preparation method for hydrodemetallization catalyst, and prepared catalyst
  • Mesoporous-macroporous composite structure alumina support and its preparation method for hydrodemetallization catalyst, and prepared catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Put 9.19g of divinylbenzene and 31.25g of styrene (mass ratio of divinylbenzene to styrene: 1:3.4) into a 500mL three-necked flask, and add 2.02g of Span 60 and 0.20g of 2,2′-azo-bis -(2,4-Dimethyl-4-methoxyvaleronitrile) and mix well. Under the condition of stirring, 115 g of deionized water was added dropwise into the three-necked flask to form a reverse-phase concentrated emulsion, so that the amount of water added was 70% of the volume of the obtained reverse-phase concentrated emulsion. The concentrated emulsion was sealed and polymerized in a mold at 50°C for 48 hours, and then dried at 90°C for 24 hours. The obtained macroporous PS template was crushed and sieved to obtain macroporous PS template particles of 50-80 meshes.

[0032] During the preparation of alumina hydrosol, weigh 334g of deionized water into a three-necked flask, add 26.7g of pseudo-boehmite under stirring conditions, add nitric acid dropwise to maintain the pH at 3, and obtain a stable alumina ...

Embodiment 2

[0035] Put 9.19 g of divinylbenzene and 37.70 g of styrene (mass ratio of divinylbenzene to styrene: 1:4.1) into a 500 mL three-necked flask, and add 9.38 g of Span 60 and 0.70 g of azobisisobutyronitrile into it. and mix well. Add 190 g of deionized water dropwise to a three-necked flask under stirring to form a reverse-phase thick emulsion, so that the amount of water added is 75% of the volume of the obtained reverse-phase thick emulsion. The concentrated emulsion was sealed and polymerized in a mold at 85°C for 12 hours, and then dried at 60°C for 36 hours. The obtained macroporous PS template was crushed and sieved to obtain macroporous PS template particles of 50-80 meshes.

[0036] During the preparation of alumina sol, weigh 334g of deionized water into a three-necked flask, add 66.8g of pseudo-boehmite under stirring conditions, add nitric acid dropwise to keep the pH at 4.0, and obtain a stable alumina hydrosol after 3 hours.

[0037]The obtained macroporous PS part...

Embodiment 3

[0039] Put 9.19g of divinylbenzene and 34.92g of styrene (mass ratio of divinylbenzene to styrene: 1:3.8) into a 500mL three-necked flask, and add 5.29g of Span 80 and 0.44g of 2,2′-azo-bis -(2,4-Dimethyl-4-methoxyvaleronitrile) and mix well. Under the condition of stirring, 320 g of deionized water was added dropwise to the three-necked flask to form a reverse-phase concentrated emulsion, so that the amount of water added was 85% of the volume of the obtained reverse-phase concentrated emulsion. The concentrated emulsion was sealed and polymerized in a mold at 70°C for 24 hours, and then dried at 80°C for 30 hours. The obtained macroporous PS template was crushed and sieved to obtain macroporous PS template particles of 50-80 meshes.

[0040] During the preparation of alumina sol, weigh 334g of deionized water into a three-necked flask, add 16.7g of pseudo-boehmite under stirring conditions, add nitric acid dropwise to maintain the pH at 3.5, and obtain a stable alumina hydro...

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Abstract

The invention discloses an alumina supporter with a mesoporous-macroporous composite structure, a preparation method of a hydrodemetallization catalyst on the alumina supporter as well as a prepared catalyst. According to the invention, a preparation technology of macroporous alumina is combined, under the premise that a complex conventional pore broadening technology is not adopted, two different types of pseudo-boehmite dry rubber powder are mixed and flexibly and controllably synthesize the alumina supporter with the mesoporous-macroporous composite structure, so that the problem that more mesopores and macropores cannot be formed with the conventional pore broadening technology is solved, and coal tar and the catalyst on the supporter are contacted better; and moreover, the hydrodemetallization catalyst loaded on the alumina supporter has high hydrodemetallization performance, so that the running period of coal tar hydrogenation equipment is prolonged.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a preparation method of a mesoporous-macroporous composite structure alumina carrier and its hydrodemetallization catalyst, and the prepared catalyst. The hydrodemetallization catalyst supported by the carrier is suitable for coal tar Demetallization process of hydrogenation and lightening. Background technique [0002] With the shortage of petroleum resources, the full utilization of energy has been widely valued. Therefore, the production of fuel by hydrogenation and lightening of coal tar has become an important measure to improve the economic value of the coking industry. In addition, hydrogenation and lightening can also effectively remove impurity components in coal tar, which has important environmental benefits. However, a large number of macromolecular compounds in coal tar, such as colloids and asphaltenes, make coal tar present the characteristics of high viscosity, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J35/10B01J21/04B01J27/19C10G45/08
Inventor 李克伦郑化安付东升苏艳敏吕晓丽肖荣林
Owner SHAANXI COAL & CHEM TECH INST
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