Prepn process of nanometer alumium hydroxide

A technology of nano-aluminum hydroxide and sodium hydroxide, applied in the direction of alumina/aluminum hydroxide, nanostructure manufacturing, nanotechnology, etc., can solve problems such as difficult to achieve effective control of nano-aluminum hydroxide particle size, and achieve production costs Low, simple process liquid, easy to operate

Inactive Publication Date: 2007-01-03
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The relevant patents CN01134059.2 and CN200410067540.8 were consulted, and the sol-gel method and the conventional homogeneous precipitation method were used to prepare nano-aluminum hydroxide. Using the above-mentioned preparation method, it is difficult to realize the preparation of nano-aluminum hydroxide. Effective control of diameter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First prepare the aluminum sulfate aqueous solution of 0.5mol / L; Utilize kerosene as film solvent, adopt the compound of Span80 and Tween80 to make emulsifier, tributyl phosphate as mobile carrier; Prepare the sodium hydroxide aqueous solution of 0.5mol / L; Kerosene, The emulsifier, tributyl phosphate and the same volume of sodium hydroxide solution were stirred at 3000r / min for 5min at a ratio of 45:2:3, and stirred at 3500r / min for 15min, and the prepared emulsion and aluminum sulfate aqueous solution were mixed at a ratio of 3: The milk-water ratio of 7, the inner and outer water phases of the liquid film in this patent are all alkaline, the pH value of the inner and outer water phases is controlled to be within the range of about 8, stirred at 260 to 350r / min for 8min, and after the stirring is stopped and the layers are separated, the The emulsion was taken out, left to stand for 3 hours to break the emulsion, and then dried to obtain nano-aluminum hydroxide powder, ...

Embodiment 2

[0018] Prepare a 1.2mol / L aluminum sulfate aqueous solution; use kerosene as a film solvent, use a compound of Span80 and Tween80 as an emulsifier, and tributyl phosphate as a mobile carrier; prepare a 1mol / L sodium hydroxide aqueous solution; kerosene, emulsifier , Tributyl phosphate was stirred with the same volume of sodium hydroxide solution at 3000r / min for 5min at a ratio of 45:2:3, and stirred at 3500r / min for 15min, and the prepared emulsion and aluminum sulfate aqueous solution were mixed at a ratio of 3:5 Emulsion-to-water ratio. In this patent, both the inner and outer water phases of the liquid film are alkaline, and the pH value of the inner and outer water phases is controlled to be within the range of about 8. Stir at 260-350r / min for 8 minutes, stop stirring and wait for stratification, then take out the emulsion , standing for 3 hours to break the emulsification and drying to obtain nano-aluminum hydroxide powder, and finally observed under TEM to obtain partic...

Embodiment 3

[0020] Prepare a 1.2mol / L aluminum sulfate aqueous solution; use kerosene as a film solvent, use a compound of Span80 and Tween80 as an emulsifier, and tributyl phosphate as a mobile carrier; prepare a 1mol / L sodium hydroxide aqueous solution; kerosene, emulsifier , Tributyl phosphate was stirred at 3000r / min for 10min with the same volume of sodium hydroxide solution in a ratio of 45:2:3, and stirred at 3500r / min for 30min, and the prepared emulsion and aluminum sulfate aqueous solution were mixed at a ratio of 3:5 Emulsion-to-water ratio. In this patent, both the inner and outer water phases of the liquid film are alkaline, and the pH value of the inner and outer water phases is controlled to be within the range of about 8. Stir at 260-350r / min for 8 minutes, stop stirring and wait for stratification, then take out the emulsion , standing for 3 hours to break the emulsification and drying to obtain nano-aluminum hydroxide powder, and finally observed under TEM to obtain parti...

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Abstract

The present invention relates to preparation of nanometer aluminum hydroxide, and is especially chemical emulsion film process of preparing nanometer aluminum hydroxide. The preparation process includes the following steps: 1. preparing water solution of aluminum sulfate of 0.5-1.5 mol/L concentration; 2. preparing water solution of sodium hydroxide of 0.5-1.0 mol/L concentration; and 3. mixing kerosene, emulsifier and tributyl phosphate in the ratio of 45 to 2 to 3 with sodium hydroxide solution in the same volume through stirring to form emulsion, mixing the emulsion with aluminum sulfate aqua in the ratio of 3 to 7 through stirring, stopping stirring for layering, taking out emulsion, stilling to demulsify and stoving to obtain nanometer aluminum hydroxide powder. The preparation process has full utilization of the material, and is simple and low in production cost. The obtained nanometer aluminum hydroxide powder has size in 20-80 nm.

Description

technical field [0001] The invention relates to a method for preparing nanometer aluminum hydroxide, and relates to a chemical method for preparing nanometer aluminum hydroxide by an emulsion liquid film method. Background technique [0002] Nano-aluminum hydroxide is widely used in construction, transportation, electrical appliances, communications and other fields. The relevant patents CN01134059.2 and CN200410067540.8 were consulted, and the sol-gel method and the conventional homogeneous precipitation method were used to prepare nano-aluminum hydroxide. Using the above-mentioned preparation method, it is difficult to realize the preparation of nano-aluminum hydroxide. Effective control of the diameter. Contents of the invention [0003] The object of the present invention is to provide a method for preparing nano-aluminum hydroxide by an emulsion liquid film method capable of effectively controlling the particle size of the prepared nano-aluminum hydroxide in view of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02B82B3/00
Inventor 仓向辉张树朝郭永恒赵春芳李荣柱
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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