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Molded phosphorus-containing hydrated alumina, preparation method thereof, and molded phosphorus-containing alumina preparation method

A technology for hydrated alumina and molded products, applied in chemical instruments and methods, separation methods, chemical/physical processes, etc., can solve the problems of unhealthy operators and unfavorable environmental protection, so as to be beneficial to environmental protection and reduce operator costs. Health effects, effects of good strength retention

Active Publication Date: 2013-12-04
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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  • Molded phosphorus-containing hydrated alumina, preparation method thereof, and molded phosphorus-containing alumina preparation method
  • Molded phosphorus-containing hydrated alumina, preparation method thereof, and molded phosphorus-containing alumina preparation method
  • Molded phosphorus-containing hydrated alumina, preparation method thereof, and molded phosphorus-containing alumina preparation method

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Experimental program
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Effect test

Embodiment 1

[0076] 5.5g phosphoric acid (H 3 PO 4 , with a concentration of 85% by weight) was dissolved in 95 mL of deionized water to obtain an aqueous phosphoric acid 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 aqueous phosphoric acid 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 a temperature of 150° C. for 12 hours, so as to obtain the phosphorus-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

[0084] (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 spray 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 amorphous hydrated alumina, where Al 2 o 3 The content is 63% by weight, and it is determined to be amorphous by XRD analysis.

[0085] (2) 3.8g phosphoric acid (H 3 PO 4 , with a concentration of 85% by weight) was dissolved in 95 mL of dei...

Embodiment 3

[0087] 15.0g phosphoric acid (H 3 PO 4 , with a concentration of 85% by weight) was dissolved in 95 mL of deionized water to obtain an aqueous phosphoric acid 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 phosphoric acid aqueous solution were stirred uniform. 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 a temperature of 80° C. for 12 hours, so as to obtain the phosphorus-containing hydrated alumina molding according to the present invention. The radial crushing strength, water absorption...

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Abstract

The invention provides a molded phosphorus-containing hydrated alumina and a preparation method thereof. The molded phosphorus-containing hydrated alumina is prepared by using raw materials containing at least one hydrated alumina, at least one phosphorus-containing compound and at least one cellulose ether, and has a water absorption rate of 0.4-1.5, a delta value of below 10% and a Q1 value of above 12N / mm. The invention also provides a molded phosphorus-containing alumina preparation method. The molded phosphorus-containing alumina preparation method is characterized in that the molded phosphorus-containing hydrated alumina is roasted to obtain molded phosphorus-containing alumina. The invention further provides an application of the above molded materials as a drying agent or a carrier of a supported catalyst. The molded phosphorus-containing hydrated alumina has a good strength retention rate and a good absorption performance. No peptizing agents are used in the invention.

Description

technical field [0001] The invention relates to a phosphorus-containing hydrated alumina molding, a preparation method and application thereof, and also relates to a method for preparing a phosphorus-containing alumina molding and the application of the phosphorus-containing alumina molding prepared by the method. 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 phosphorus into the alumina molding to meet the requirements of specific occasions. For example, using phosphorous-containing alumina moldings as a carrier to prepare a hydrofining catalyst can adjust the hydrofining performance of the catalyst. [0003] Phosphorus-containing alumina moldings can be obtained by mixing hydrated alumina with water, peptizer and optional extru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30B01J32/00B01D53/28
Inventor 曾双亲杨清河李丁健一刘滨孙淑玲任亮聂红李大东
Owner CHINA PETROLEUM & CHEM CORP
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