Integral macroporous alumina and preparation method thereof

A macroporous alumina, monolithic technology, applied in alumina/aluminum hydroxide and other directions, can solve the problems of high preparation cost, large amount of template, monomer toxicity of template, etc., and achieves simple preparation process, low cost, and ease of use. removal effect

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These processes make the preparation of monolithic macroporous alumina materials common problems such as the monomers used to prepare templates have certain toxicity, the amount of templates used is large, the preparation costs are high, and the process implementation is relatively cumbersome.
At the same time, there is also the problem of environmental pollution caused by emissions during the roasting process.

Method used

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  • Integral macroporous alumina and preparation method thereof
  • Integral macroporous alumina and preparation method thereof
  • Integral macroporous alumina and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0027] After fully dissolving 10 grams of aluminum chloride, 20 grams of water, and 0.15 grams of polyethylene glycol (viscosity average molecular weight of 1 million) and mixing uniformly, 0.15 grams of propylene oxide was added to the above mixture and mixed uniformly therewith. The resulting mixed product was aged at 35°C for 24 hours, then soaked in ethanol for 24 hours after aging, and after removing the liquid phase, the vacuum degree was measured by gauge pressure: at a vacuum degree of -0.075MPa and a drying temperature of 25°C, dry for 5 After 1 hour, the temperature was raised to 550°C at a heating rate of less than 50°C / min, kept at a constant temperature for 10 hours, and then cooled to room temperature to obtain the monolithic macroporous alumina described in the present invention. The main synthetic data are listed in Table 1, and the product properties are listed in Table 2.

Embodiment 2

[0029] Carry out this example according to the method for embodiment 1, used raw material and consumption are listed in table 1. The resulting mixed product was aged at 25°C for 24 hours, then soaked in ethanol for 24 hours after aging, and after removing the liquid phase, the vacuum degree was measured by gauge pressure: at a vacuum degree of -0.090MPa and a drying temperature of 25°C, dry for 5 After 1 hour, the temperature was raised to 550°C at a heating rate of less than 50°C / min, kept at a constant temperature for 10 hours, and then cooled to room temperature to obtain the monolithic macroporous alumina of the present invention. The properties of the product are listed in Table 2.

Embodiment 3

[0031] Carry out this example according to the method for embodiment 1, used raw material and consumption see table 1, and product property is listed in table 2.

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Abstract

The invention discloses a method for preparing integral macroporous alumina. The method comprises the following steps of: uniformly mixing an aluminum source, polyethylene glycol and at least one of lower alcohol and water, adding low-carbon alkylene oxide into the mixture, ageing, soaking, drying and roasting to obtain the integral macroporous alumina. The preparation method is simple, feasible, and environment-friendly; and the obtained integral macroporous alumina has the controllable pore size of 0.05 to 10 mu m. The integral macroporous alumina can be applied to the fields such as macromolecular heterogeneous catalysis, adsorption and separation materials, chromatographic fillers, acoustic resistant and thermal resistant materials and the like.

Description

technical field [0001] The invention relates to an integral macroporous alumina and a preparation method thereof, belonging to the field of inorganic material preparation. Background technique [0002] Monolithic macroporous oxides are widely used in heterogeneous catalysts, catalyst supports, adsorption and separation materials, chromatographic packing, electrode materials, acoustic resistance and thermal stability due to their large pore structure, high specific surface area and good thermal stability. Resistive materials and other fields. [0003] "Chemical Material" (2004, volume 16, pages 4245-4256) reported that acrylamide was used as an organic monomer, N, N-methylenebisacrylamide crosslinking agent, and Triton X-405 and PVA were used as surface Active agent and stabilizer, using mineral oil as dispersed phase, ammonium persulfate and tetramethylethylenediamine as initiator, prepared porous polymer foam microsphere template by emulsion polymerization, and then added ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02
Inventor 杨卫亚沈智奇凌凤香孙万付王丽华季洪海郭长友
Owner CHINA PETROLEUM & CHEM CORP
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