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Hydrated alumina molded matter and preparation method thereof, alumina molded matter and applications of hydrated alumina molded matter and alumina molded matter

A technology of hydrated alumina and moldings, which is applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve the problems of unfavorable health of operators and unfavorable environmental protection, and achieve environmental protection and reduce Effects on the health of operators and the effect of reducing production costs

Active Publication Date: 2014-01-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Also, acids (for example: nitric acid, citric acid, oxalic acid, acetic acid, formic acid, malonic acid, hydrochloric acid and trichloroacetic acid) are usually used as peptizers. A large amount of acid gas is released during the process, which is not only harmful to the health of operators, but also not conducive to environmental protection

Method used

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  • Hydrated alumina molded matter and preparation method thereof, alumina molded matter and applications of hydrated alumina molded matter and alumina molded matter
  • Hydrated alumina molded matter and preparation method thereof, alumina molded matter and applications of hydrated alumina molded matter and alumina molded matter
  • Hydrated alumina molded matter and preparation method thereof, alumina molded matter and applications of hydrated alumina molded matter and alumina molded matter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] 100.0g of pseudoboehmite powder (purchased from Sinopec Catalyst Changling Branch, dry basis content of 69.5% by weight), 4.0g of methylcellulose (purchased from Zhejiang Haishen Chemical Co., Ltd.), 3.0g of Sesame powder , 20.2g metatitanic acid slurry (using TiO 2 Calculated, the titanium content is 40% by weight) and 80g of deionized water are mixed evenly. The resulting mixture is fed into an extruder and extruded to obtain a wet strip. The extruded wet strip was dried in an oven at 150° C. for 12 hours to obtain the hydrated alumina molding according to the present invention, whose radial crushing strength, water absorption and δ value are listed in Table 1.

Embodiment 2

[0089] (1) In a 2L reaction tank, add 2000mL of aluminum sulfate solution and sodium metaaluminate solution (Al 2 o 3 content of 200g / L, caustic coefficient of 1.58) for precipitation reaction, the reaction temperature is 50°C, the pH value is 6.0, and the reaction residence time is 15 minutes; the obtained slurry is filtered with a vacuum filter. Add 20L of deionized water (at a temperature of 40±5°C) to the filter cake to rinse the filter cake for about 60 minutes. Add the washed filter cake into 1.5L deionized water and stir to form a slurry, then pump the slurry into the spray dryer for drying, control the outlet temperature of the spray dryer within the range of 100-110°C, and the material drying time is 2 minutes to obtain hydrated alumina, wherein, Al 2 o 3 The content is 63% by weight, and it is determined to be amorphous by XRD analysis.

[0090] (2) 50.0g of pseudoboehmite powder (purchased from Sinopec Catalyst Changling Branch, with a dry basis content of 69.5%...

Embodiment 3

[0092]60.0g of pseudo-boehmite (purchased from Sinopec Catalyst Changling Branch, with a dry basis content of 69.5% by weight), 40.0g of gibbsite (purchased from Guangxi Pingguo Aluminum Company, with a dry basis content of 64.5% by weight %), 1.0g methylcellulose (purchased from Zhejiang Haishen Chemical Co., Ltd.), 2.0g hydroxypropyl methylcellulose (purchased from Zhejiang Haishen Chemical Co., Ltd.), 3.0g scallop powder, 30.0g titanium dioxide and 120g of deionized water was stirred evenly. The resulting mixture is fed into an extruder and extruded to obtain a wet strip. The obtained wet strip was placed in an oven and dried at 80° C. for 12 hours to obtain the alumina hydrate molding according to the present invention, whose radial crushing strength, water absorption and δ value are listed in Table 1.

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Abstract

The invention provides a hydrated alumina molded matter, and a preparation method and an application thereof. The hydrated alumina molded matter is prepared from raw materials comprising at least one hydrated alumina, at least one group IVB metal element-containing compound and at least one cellulose ether. The water absorption rate of the hydrated alumina molded matter is 0.4-1.5, the delta value is below 10%, and the Q1 is more than 12 N / mm. The invention also provides an alumina molded matter and an application thereof. The alumina molded matter is prepared by calcination of the hydrated alumina molded matter. The molded matters provided by the invention have high strength and good strength retention rate. According to the method of the invention, a peptizing agent is not used during the molding process.

Description

technical field [0001] The invention relates to a hydrated alumina molding and its preparation method and application, and also relates to an alumina molding and its application. Background technique [0002] Alumina, especially γ-alumina, because of its good pore structure, heat resistance stability, and high specific surface area, alumina moldings are often used as carriers for desiccants or supported catalysts. The properties of alumina can be adjusted by introducing metal elements into alumina moldings to meet the requirements of specific occasions. For example, the aluminum oxide molding containing Group IVB metal elements is used as a carrier to support the active component with hydrogenation catalysis, and the hydrogenation catalysis performance of the prepared catalyst can be adjusted. [0003] The alumina molding containing Group IVB metal elements can be obtained by mixing hydrated alumina with water, peptizer and optional extrusion aid, and successively molding, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/04B01J21/06B01J37/00
Inventor 曾双亲杨清河李丁健一刘滨任亮孙淑玲聂红李大东
Owner CHINA PETROLEUM & CHEM CORP
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