Alkali-modified high specific surface area alumina material and its preparation method and application

A technology with high specific surface area and specific surface area, applied in chemical instruments and methods, alkali metal oxides/hydroxides, alkali metal compounds, etc., can solve the problems of small pore size, large specific surface area of ​​alumina, and channel blockage, etc., to achieve Excellent performance, high specific surface area, and stable structure

Active Publication Date: 2019-05-14
SHANGHAI LVQIANG NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention prepares alumina with large specific surface area and large pore volume, but there is a problem of small pore size, which is not suitable for substances with large adsorption molecules, and the problem of pore blockage is prone to occur

Method used

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  • Alkali-modified high specific surface area alumina material and its preparation method and application
  • Alkali-modified high specific surface area alumina material and its preparation method and application
  • Alkali-modified high specific surface area alumina material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh activated alumina powder and pseudoboehmite dry rubber powder according to 90:10 mass percentage, and mix them evenly; configure 2% EDTA aqueous solution, use sodium hydroxide to adjust the pH value of the aqueous solution to 11, so that EDTA is completely dissolved ; Spray the prepared aqueous solution into the uniformly mixed powder, and granulate through discs to obtain 2.0-3.0mm granule moldings. Introduce water vapor at 105°C, keep for 1 hour, dry at 80°C, and roast at 350°C to prepare alumina material ①.

Embodiment 2

[0032] Weigh activated alumina powder and pseudoboehmite dry rubber powder according to 40:60 mass percentage, and mix them evenly; configure 5% EDTA disodium aqueous solution, use sodium carbonate to adjust the pH value of the aqueous solution to 9, and make EDTA di The sodium is completely dissolved; the prepared aqueous solution is sprayed into the uniformly mixed powder, and granulated by a drum to obtain a granule shaped product of 4.0-6.0 mm. Introduce water vapor at 125°C, keep for 5 hours, dry at 150°C, and roast at 600°C to prepare alumina material②.

Embodiment 3

[0034] Weigh activated alumina powder and pseudoboehmite dry rubber powder according to the mass percentage of 50:50, and mix them evenly; configure 20% tetrasodium EDTA aqueous solution, use sodium bicarbonate to adjust the pH value of the aqueous solution to 9, and make EDTA The tetrasodium is completely dissolved; the prepared aqueous solution is sprayed into the uniformly mixed powder, and granulated by a sugar coating machine to obtain 3.0-5.0mm granule moldings. Introduce water vapor at 110°C, keep for 5 hours, dry at 110°C, and bake at 400°C to prepare the alumina material③.

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Abstract

The invention relates to an alkali-modified alumina material having a high specific surface area, a preparing method thereof and applications of the material. The specific surface area of the alumina material is not less than 350 m<2> / g and the pore volume of the alumina material is not less than 0.5 cm<3> / g. The method includes (1) weighing active alumina powder and pseudoboehmite dry gel powder according to preset mass percentages and fully mixing the active alumina powder and the pseudoboehmite dry gel powder, (2) preparing an aqueous solution of EDTA or a sodium salt of EDTA, adjusting the pH value of the aqueous solution by using an alkali metal salt to achieve full dissolution, and performing particle molding through adopting the aqueous solution as an adhesive, and (3) subjected molded particles to hydration curing, drying and calcination to obtain the alumina material. Compared with the prior art, the prepared alumina material has the high specific surface area, a specific pore structure and surface properties, can be adopted as an adsorbent for a plurality of fields, especially the environment protection field, and can be used for treatment of complexing metal waste water.

Description

technical field [0001] The invention relates to a preparation method of an alkali-modified high specific surface area alumina material and its environmental protection application, in particular to a preparation process of an alumina material and its application in the removal of complex metal wastewater. Background technique [0002] With the rapid development and innovation of modern industry, alumina, as an important adsorbent or catalyst and its carrier, is widely used in petrochemical, organic synthesis, fine chemical and other fields, especially in the fields of adsorption and separation. use. [0003] Traditional alumina cannot meet the adsorption requirements due to its small specific surface area and uneven pore size distribution. The application and demand of alumina materials with higher specific surface area and more specific pore size distribution are more extensive. [0004] Chinese patent CN103787388A discloses a method for preparing an alumina carrier. Pseud...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/08B01J20/28B01J20/30C02F1/28C02F101/20C02F103/16
CPCB01J20/041B01J20/043B01J20/08B01J20/28057B01J20/28088B01J20/28095C02F1/288C02F2101/20C02F2103/16
Inventor 张佳陈伟何秋平余金鹏周永贤朱琳王鹏飞
Owner SHANGHAI LVQIANG NEW MATERIALS CO LTD
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