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A kind of preparation method of modified alumina

A technology of alumina modification, applied in chemical instruments and methods, alumina/aluminum hydroxide, aluminum compounds, etc., can solve problems such as weak alkalinity, achieve lower alkalinity, low production cost, and simple operation steps Effect

Active Publication Date: 2020-05-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in fact, alumina is an acid-base amphoteric compound, and its alkalinity is weaker than that of acid.

Method used

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  • A kind of preparation method of modified alumina
  • A kind of preparation method of modified alumina
  • A kind of preparation method of modified alumina

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Mix 10g of alumina with 100mL of deionized water, stir for 30 minutes, and then dry at 150°C for 15 hours;

[0048] (2) Mix the alumina obtained in step (1) with 100mL ethanol, stir for 30 minutes, then dry at 150°C for 15h, and then treat at 260°C for 4h;

[0049] (3) Mix the alumina obtained in step (2) with 12g of aluminum chloride and 100mL of deionized water, stir for 5h, then directly filter and separate, and then dry at 150°C for 15h;

[0050] (4) Treat the substance obtained in step (3) at 500°C for 6 hours in a nitrogen atmosphere;

[0051] (5) Mix the alumina obtained in step (4) with 12g of aluminum chloride and 100mL of deionized water, stir for 5 hours, then directly filter and separate, and then dry at 150°C for 15 hours;

[0052] (6) Treat the material obtained in step (5) at 500° C. for 6 hours in a nitrogen atmosphere, and finally obtain modified alumina. The obtained sample number is CL1, and the basic properties of the obtained samples are shown...

Embodiment 2

[0054] (1) Mix 10g of alumina with 90mL of deionized water, stir for 30 minutes, and then dry at 140°C for 15 hours;

[0055] (2) Mix the alumina obtained in step (1) with 90mL of ethanol, stir for 30 min, then dry at 140°C for 15h, then treat at 265°C for 4h;

[0056] (3) Mix the alumina obtained in step (2) with 10g of aluminum chloride and 90mL of deionized water, stir for 4 hours, then directly filter and separate, and then dry at 150°C for 15 hours;

[0057] (4) Treat the substance obtained in step (3) at 500°C for 5 hours in a nitrogen atmosphere;

[0058] (5) Mix the alumina obtained in step (4) with 10g of aluminum chloride and 100mL of deionized water, stir for 5 hours, then directly filter and separate, and then dry at 150°C for 15 hours;

[0059] (6) Treat the material obtained in step (5) at 500° C. for 5 hours in a nitrogen atmosphere, and finally obtain modified alumina. The obtained sample number is CL2, and the physicochemical properties of the obtained sampl...

Embodiment 3

[0061] (1) Mix 10g of alumina with 90mL of deionized water, stir for 30 minutes, and then dry at 140°C for 15 hours;

[0062] (2) Mix the alumina obtained in step (1) with 90 mL of ethanol, stir for 30 min, then dry at 140 °C for 15 h, and then treat at 260 °C for 4 h;

[0063] (3) Mix the alumina obtained in step (2) with 8g of aluminum chloride and 100mL of deionized water, stir for 6 hours, then directly filter and separate, and then dry at 150°C for 15 hours;

[0064] (4) Treat the substance obtained in step (3) at 450°C for 6 hours in a nitrogen atmosphere;

[0065] (5) Mix the alumina obtained in step (4) with 8g of aluminum chloride and 100mL of deionized water, stir for 5h, then directly filter and separate, and then dry at 150°C for 15h;

[0066] (6) Treat the material obtained in step (5) at 450° C. for 6 hours in a nitrogen atmosphere, and finally obtain modified alumina. The obtained sample number is CL3, and the physicochemical properties of the obtained sample ...

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Abstract

The invention provides a preparation method of modified aluminum oxide. The aluminum oxide is gamma-aluminum oxide with the surface area of 100-500 m<2> / g and the pore volume of 0.1-0.6 cm<3> / g. The preparation method comprises the steps as follows: aluminum oxide and deionized water are mixed, stirred and dried; then, the mixture and ethanol are mixed, stirred and dried, and the obtained mixtureis treated at a certain temperature; the treated mixture is mixed and stirred with an aid and deionized water, and direct separation, drying and high-temperature treatment are performed; the treated mixture is mixed and stirred with an aid and deionized water, direct separation, drying and high-temperature treatment are performed, and the modified aluminum oxide product is obtained. The aluminum oxide has an alkalinity adjustable characteristic and can meet the requirement of adsorbents and carriers for different alkalinity of the aluminum oxide.

Description

technical field [0001] The invention relates to a method for preparing alumina, in particular to a method for preparing alumina with adjustable alkaline properties. Background technique [0002] Alumina is an important porous material in industry and is widely used as catalyst carrier and adsorbent. In the prior art, technologies for preparing and modifying alumina are mainly aimed at increasing the acidity of alumina, adjusting pore structure, and improving structural stability. The patent CN104588011A alkane dehydrogenation catalyst and its preparation method uses an alcohol modification method to treat alumina. The specific process is as follows: heat and vacuumize the Sn-containing alumina carrier, then add alcohol solvent in a vacuum state, return to normal pressure, and heat and reflux. The patent describes that the alcohol solvent can modify the surface of the Sn-loaded alumina carrier, the alcohol solvent molecules can preferentially occupy the surface adsorption s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02
CPCC01F7/021C01P2006/12C01P2006/14
Inventor 范峰凌凤香张会成王少军杨春雁
Owner CHINA PETROLEUM & CHEM CORP