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Spherical aluminium oxide carrier material and preparation process thereof

A technology of spherical alumina and carrier materials, applied in catalyst carriers, chemical instruments and methods, chemical/physical processes, etc., can solve problems that do not involve the magnetic properties of alumina, no alumina carrier materials have been found, and achieve good thermal stability Sexuality and corrosion resistance, good magnetic properties, and the effect of preventing loss

Inactive Publication Date: 2004-01-07
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned documents mainly disclose the preparation of alumina and the control of alumina crystal form, structure or strength, but none of them involve the magnetic properties of alumina. So far, no alumina carrier materials with superparamagnetic properties have been found. report

Method used

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  • Spherical aluminium oxide carrier material and preparation process thereof
  • Spherical aluminium oxide carrier material and preparation process thereof
  • Spherical aluminium oxide carrier material and preparation process thereof

Examples

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Effect test

Embodiment 1

[0041] 189g Na 2 SiO 3 9H 2 O (Zhejiang Wenzhou Dongsheng Chemical Reagent Factory) was dissolved in 800 mL of distilled water, and 3 mol / L HCl solution was slowly added dropwise under stirring condition, the pH value of the solution was adjusted to 13, and it was filtered for later use.

[0042] Add 23.4 g of FeCl to a 2 L stirred reactor filled with 1000 mL of distilled water 3 ·6H 2 O (Beijing Chaoyang Tonghui Chemical Plant) and 8.6g FeCl 2 4H 2 O (Beijing Shuanghuan Chemical Reagent Factory), under the protection of nitrogen, the temperature was raised to 85-90°C, and 30mL of 25% NH was added during high-speed stirring. 3 ·H 2 O solution, after stirring at high speed for 3min, use a magnetic separator to separate Fe 3 o 4 Nanoparticle products. Ultrasonic dispersion of the cleaned deposition product in the above pretreated Na 2 SiO 3 solution, and then moved into a 2-liter stirred reactor, heated to 85°C, and under nitrogen protection and stirring conditions, s...

Embodiment 2

[0050] 28.4g Na 2 SiO 3 9H 2O (Zhejiang Wenzhou Dongsheng Chemical Reagent Factory) was dissolved in 600 mL of distilled water, and 3 mol / L HCl solution was slowly added dropwise under agitation to adjust the pH value of the solution to 13, and filtered for later use.

[0051] Add 46.7 g of FeCl to a 2 L stirred reactor filled with 1000 mL of distilled water 3 ·6H 2 O (Beijing Chaoyang Tonghui Chemical Plant) and 17.2g FeCl 2 4H 2 O (Beijing Shuanghuan Chemical Reagent Factory), under the protection of nitrogen, heat up to 85-90 °C, add 160mL of 6Mol / L NaOH solution during high-speed stirring, and after high-speed stirring for 3min, use a magnetic separator to separate Fe 3 o 4 Nanoparticle products. Ultrasonic dispersion of the cleaned deposition product in the above pretreated Na 2 SiO 3 solution, and then moved into a 2-liter stirred reactor, raised the temperature to 85°C, and slowly added HCl solution with a concentration of about 1.5mol / L dropwise to the solutio...

Embodiment 3

[0057] The above-mentioned AL1 magnetic spherical Al(OH) 3 The product was put into a 1L autoclave containing 0.7L sulfonated kerosene medium, and subjected to hydrothermal treatment at 140°C for 3 hours under the protection of nitrogen. After aging for 6 hours (removing some of the impurities) and drying at 60°C, a magnetic spherical Al(OH) with a boehmite structure (α-AlOOH) can be obtained 3 product, the product is sintered at 580 ° C for 2 hours in an air atmosphere, and about 60 g of γ-Fe-containing 2 o 3 Spherical γ-Al with Magnetic Core 2 o 3 carrier. The content ratio (weight ratio) of each component in the carrier material is: γ-Fe 2 o 3 : SiO 2 :Al 2 o 3 =30:9:61 (in addition, the carrier also contains part of water). This carrier has superparamagnetic characteristics.

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Abstract

The present invention discloses a spherical alumina carrier material, said carrier material contains 50-90 wt% of alumina and 1-50 wt% of magnetic granules, in which the described magnetic granules are formed from SiO2 convering layer and one or several kinds selected from Fe3O4, Fe and gamma-Fe2O3 as internal kernal material, and the weight ratio of the described covering layer and internal kernel is 0.01-6:1. Said invention also provides its preparation method and application as catalyst carrier.

Description

technical field [0001] The invention relates to a spherical alumina carrier material and a preparation method thereof. technical background [0002] Fine-grained catalytic materials have the advantages of large specific surface area, fast mass transfer rate, and high catalytic efficiency. The development of fine-grained catalysts is an important development direction of heterogeneous catalysis research in recent years. However, due to the small size of catalyst particles, it is difficult to control , and there is the problem that the separation and recovery of the catalyst after the reaction is difficult. The development of fine-grained magnetic catalysts and magnetically stable reaction technology (see "Research and Development of Industrial Catalysts", China Petrochemical Press, 1997, p. 195) has opened up a new way for the research and application of functionalized fine-grained catalysts. [0003] In petrochemical industry, alumina, as the catalyst carrier with the large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00
Inventor 张冠东官月平孟祥堃安振涛刘会洲
Owner CHINA PETROLEUM & CHEM CORP
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