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Iron-containing hydrated alumina molded matter and preparation method thereof, and iron-containing alumina molded matter and applications of iron-containing hydrated alumina molded matter and iron-containing alumina molded matter

A technology of hydrated alumina and moldings, which is applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., and can solve problems such as unfavorable health of operators and unfavorable environmental protection. Achieve environmental protection, reduce the impact on the health of operators, and reduce the amount of acid gas

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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  • Iron-containing hydrated alumina molded matter and preparation method thereof, and iron-containing alumina molded matter and applications of iron-containing hydrated alumina molded matter and iron-containing alumina molded matter
  • Iron-containing hydrated alumina molded matter and preparation method thereof, and iron-containing alumina molded matter and applications of iron-containing hydrated alumina molded matter and iron-containing alumina molded matter
  • Iron-containing hydrated alumina molded matter and preparation method thereof, and iron-containing alumina molded matter and applications of iron-containing hydrated alumina molded matter and iron-containing alumina molded matter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] With stirring, 10.0g ferric chloride (FeCl 3 ·6H 2 O) Dissolve in 90mL deionized water to obtain ferric chloride solution. 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 Mix well with the above ferric chloride solution. The resulting mixture is fed into an extruder and extruded to obtain a wet strip. The extruded wet strip was placed in an oven and dried at 150° C. for 12 hours, so as to obtain the iron-containing hydrated alumina molding according to the present invention. The radial crushing strength, water absorption rate and δ value of the obtained moldings were measured, and the results are listed in Table 1.

Embodiment 2

[0086] (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 to 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 for 2 minutes to obtain hydrated alumina, where, Al 2 o 3 The content is 63% by weight, and it is determined to be amorphous by XRD analysis.

[0087] (2) With stirring, 6.0g ferric chloride (FeCl 3 ·6H 2 O) Dissolve in 95mL deionized water to obtain ferric chloride solu...

Embodiment 3

[0089] At a temperature of 60°C, with stirring, 16.0 g of ferric chloride (FeCl 3 ·6H 2 O) Dissolve in 95mL deionized water to obtain ferric chloride solution. 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 and the above ferric chloride The solution 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, so as to obtain the iron-containing hydrated alumina shaped article according to the present invention. The radial crushing strength, water absorption rate and δ value of the obtain...

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Abstract

The invention provides an iron-containing hydrated alumina molded matter, and a preparation method and an application thereof. The iron-containing hydrated alumina molded matter is prepared from raw materials comprising at least one hydrated alumina, at least one iron-containing compound and at least one cellulose ether. The water absorption rate of the iron-containing hydrated alumina molded matter is 0.4-1.5, the delta value is 10% or less, and the Q1 is 12 N / mm or more. The invention also provides an iron-containing alumina molded matter prepared by calcination of the iron-containing hydrated alumina molded matter. The invention also provides an application of the molded matters as a drying agent or as a carrier of a supported catalyst. The iron-containing hydrated alumina molded matter contains no peptizing agent, has good strength retention rate, and cannot or basically cannot generate phenomena of dissolving, powdering or pore collapsing even being immersed in an impregnating solution for a long time. The method of the invention does not adopt the peptizing agent.

Description

technical field [0001] The invention relates to an iron-containing hydrated alumina molding and its preparation method and application, and the invention also relates to an iron-containing 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 iron into the alumina molding to meet the requirements of specific occasions. For example, using iron-containing alumina moldings as a carrier to prepare a hydrogenation catalyst can adjust the hydrofining performance of the catalyst. [0003] The iron-containing alumina molding can be obtained by mixing hydrated alumina with water, peptizing agent and optional extrusion aid, and the mixture is successively shaped, dried, and high-temperature roasted to obtain a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J32/00B01J23/745
Inventor 任亮杨清河曾双亲刘滨丁石聂红李大东
Owner CHINA PETROLEUM & CHEM CORP
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