Spherical aluminium oxide carrier material and preparation process thereof

A technology of spherical alumina and carrier materials, applied in the direction of 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 Sex and corrosion resistance, good magnetic properties, cost reduction effect

Inactive Publication Date: 2005-04-06
CHINA PETROLEUM & CHEM CORP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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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, 3mol / L HCl solution was slowly added dropwise under stirring, the pH value of the solution was adjusted to 13, and it was filtered for use.

[0042] Add 23.4g FeCl to a 2-liter stirred reactor containing 1000mL 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 is increased to 85~90℃, and 30mL of 25% NH is added during high-speed stirring. 3 ·H 2 O solution, after stirring at high speed for 3 min, separate Fe with magnetic separator 3 O 4 Nanoparticle products. The deposited product after cleaning is ultrasonically dispersed in the above pretreated Na 2 SiO 3 The solution is then transferred to a 2 liter stirred reactor, and the temperature is raised to 85°C. Under nitrogen protection and stirring, slowly add HCl solut...

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, 3mol / L HCl solution was slowly added dropwise under stirring, the pH value of the solution was adjusted to 13, and it was filtered for use.

[0051] Add 46.7g FeCl to a 2-liter stirred reactor containing 1000mL 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 to 85~90℃, add 160mL 6MolL NaOH solution during high-speed stirring, and after high-speed stirring for 3min, separate Fe with magnetic separator 3 O 4 Nanoparticle products. The deposited product after cleaning is ultrasonically dispersed in the above pretreated Na 2 SiO 3 The solution is then transferred to a 2 liter stirred reactor, the temperature is raised to 85°C, and under the protection of nitrogen and stirring, the HCl solution with a concentration of about 1.5 mo...

Embodiment 3

[0057] The above 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 under nitrogen protection for 3 hours. After cleaning and degreasing the product, it was then placed in dilute ammonia water with pH=11 (measured at room temperature) at 80°C. Aging for 6 hours (removing some of the impurities), after drying at 60°C, magnetic spherical Al(OH) with a boehmite structure (α-AlOOH) can be obtained 3 The product is sintered in an air atmosphere at 580°C for 2 hours to obtain about 60 g of γ-Fe 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-particle catalytic materials have the advantages of large specific surface area, fast mass transfer rate, and high catalytic efficiency. The development of fine-particle catalysts is an important development direction in heterogeneous catalysis research in recent years. However, due to the small catalyst particles, it is not only difficult to control the reaction process Moreover, there is a problem that it is difficult to separate and recover the catalyst after the reaction. The development of fine-particle magnetic catalysts and magnetically stable reaction technology (see "Industrial Catalyst Research and Development", China Petrochemical Press, 1997, page 195) has opened up new ways for the research and application of functionalized fine-particle catalysts. [0003] In the petrochemical industry, alumina is the most demanded...

Claims

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Application Information

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Patent Type & Authority Patents(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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