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A kind of preparation method of mesoporous θ-alumina spherical carrier

A kind of technology of alumina and mesoporous, which is applied in the field of oil-water column forming of mesoporous spherical θ-alumina, which can solve the problems of unbalanced sphericity, uneven strength distribution, uneven distribution, etc., and achieve good sphericity and operation steps Simple, evenly distributed effect

Active Publication Date: 2018-03-30
淄博链科工程材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for forming an oil-water column using a template to prepare a mesoporous θ-alumina spherical shape, so as to solve the problem of small pore size and uneven distribution, uneven strength distribution and sphericity described in the technical background. question

Method used

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  • A kind of preparation method of mesoporous θ-alumina spherical carrier

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Effect test

Embodiment 1

[0025] Prepare spherical θ-alumina according to the method steps of the present invention;

[0026] Ingredients: Add 10g of methylcellulose to 100g of aluminum sol, stir well, then add 150g of ammonium alginate solution (2%wt), and stir fully to form a mixed slurry of aluminum sol-methylcellulose-ammonium alginate ,spare.

[0027] Equipment: The oil-water column is 1.2m high and 20cm in diameter, the upper oil phase is kerosene, 5mm high, and the lower water phase is 0.5mol / L calcium nitrate solution, 115cm high. The drip nozzle at the bottom of the drip ball is 2cm away from the oil surface, and a pump is used to control the oil level to be stable.

[0028] Forming: Drop the mixed slurry from the top of the oil-water column through a ball dropper, the aperture size of the drip nozzle is 1mm, and the dripping speed of a single nozzle is 2 drops / second. The mixed slurry droplets shrink into balls in the oil phase, and smoothly pass through the oil-water interface into the wat...

Embodiment 2

[0034] Prepare θ-Al according to the steps in Example 1 2 o 3 ball, the difference is: 10g of acrylic acid is added to the ingredients, and it is fully stirred to form a mixed slurry of aluminum sol-acrylic acid-ammonium alginate, and the obtained θ-Al 2 o 3 The basic properties of the ball are shown in Table 1.

Embodiment 3

[0036] Prepare θ-Al according to the steps in Example 1 2 o 3 ball, the difference is: add 10g of ammonium acrylate to the ingredients, fully stir to form a mixed slurry of aluminum sol-ammonium acrylate-ammonium alginate, and the prepared θ-Al 2 o 3 The basic properties of the ball are shown in Table 1.

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Abstract

The invention provides a method for preparing a mesoporous theta-aluminum oxide spherical carrier. The method is characterized by comprising the following steps: adding a template agent and a molding agent into aluminum sol, and generating a great number of mesoporous structures from alumina spheres in the sol-gel molding and aging process of the aluminum soil in the presence of the template agent. The specific surface area of the mesoporous spherical aluminum oxide is 50-200m<2> / g, the granular diameter of the mesoporous spherical aluminum oxide is 0.4-5mm, the pore volume of the mesoporous spherical aluminum oxide is 0.3-1.6cm<3> / g, the aperture of the mesoporous spherical aluminum oxide is 10-35nm, and the crushing strength of the mesoporous spherical aluminum oxide is 25-200N / granule. The spherical aluminum oxide prepared by using the method has the advantages of high pore volume, large aperture, high strength and the like.

Description

technical field [0001] The invention relates to the technical field of catalyst carriers, in particular to an oil-water column forming method for preparing mesoporous spherical θ-alumina through a template method. The mesoporous spherical alumina material has high specific surface area, large pore volume and high crushing strength, and can be widely used as a catalyst or a catalyst carrier in the fields of petrochemical and fine chemical industries. Background technique [0002] At present, the preparation of mesoporous alumina is mainly based on organic or inorganic aluminum salts as the aluminum source, and surfactants as templates. Under certain circumstances, organic and inorganic liquid crystals are formed through self-assembly, and then the precursors are removed through post-processing. The surfactant in the mixture finally obtains mesoporous alumina with ordered pore structure. However, the mesoporous alumina material synthesized by the above method mainly exists in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02B01J21/04B01J35/08
CPCB01J21/04B01J35/08B01J35/1014B01J35/1019B01J35/1042B01J35/1061C01F7/025C01P2004/32C01P2004/60C01P2006/12C01P2006/14C01P2006/16C01P2006/21
Inventor 于冠红苏广辉靳昀高伟其他发明人请求不公开姓名
Owner 淄博链科工程材料有限公司
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