Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of boehmite nanocrystallines or nanowhiskers

A nano-whisker, boehmite technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as unfavorable operation and complicated process, and achieve pollution avoidance, simple operation, and usefulness. wide range of effects

Inactive Publication Date: 2014-04-09
HENAN UNIV OF SCI & TECH
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the CO 2 The process becomes complicated, and the solution temperature is 70-130°C, which is not conducive to operation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of boehmite nanocrystallines or nanowhiskers
  • Preparation method of boehmite nanocrystallines or nanowhiskers
  • Preparation method of boehmite nanocrystallines or nanowhiskers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of the boehmite nanocrystal provided by the present embodiment comprises the following steps:

[0043] 1) Preparation of boehmite nanocrystalline seeds, prepared by the following steps:

[0044] a. Al(NO with a concentration of 0.5mol / L 3 ) 3 9H 2 Mix 100mL of O solution and 150mL of NaOH solution with a concentration of 1mol / L, adjust the pH=7, stir evenly, transfer to an autoclave, and react at 105°C for 2h to obtain a solid-phase product that is boehmite nanocrystals;

[0045] b. The boehmite nanocrystalline solid-liquid system is suction-filtered, washed 3 times, dried at 90°C, and ground into powder;

[0046] c. Soak the powder prepared in step b with a ratio of solid to water mass ratio of 1:2, ultrasonicate for 60 minutes, and place for 24 hours; then filter with suction, dry at 90°C, and grind into powder;

[0047] d. Repeat step c at least once.

[0048] 2) Put boehmite nanocrystal seeds into the Bayer process mother liquor, induce c...

Embodiment 2

[0055] The preparation method of the boehmite nanocrystal provided by the present embodiment comprises the following steps:

[0056] 1) Preparation of boehmite nanocrystalline seeds, prepared by the following steps:

[0057] a. AlCl with a concentration of 1mol / L 3 ·6H 2Mix 80mL of O solution and 160mL of NaOH solution with a concentration of 1mol / L, adjust the pH=10, stir evenly, transfer to an autoclave, and react at 130°C for 10h to obtain a solid-phase product that is boehmite nanocrystals;

[0058] b. The boehmite nanocrystalline solid-liquid system is suction filtered, rinsed twice, dried at 80°C, and ground into powder;

[0059] c. Soak the powder obtained in step b with a ratio of solid to water mass ratio of 1:20, ultrasonicate for 50 minutes, and place for 36 hours; then filter with suction, dry at 80°C, and grind into powder;

[0060] d. Repeat step c at least once.

[0061] 2) Put boehmite nanocrystal seeds into the Bayer process mother liquor, induce crystalli...

Embodiment 3

[0066] The preparation method of the boehmite nano-whiskers provided by the present embodiment comprises the following steps:

[0067] 1) Preparation of boehmite nano-whisker seeds, prepared by the following steps:

[0068] a. Al with a total concentration of 1mol / L 2 (SO 4 ) 3 18H 2 O solution and Al(NO 3 ) 3 9H 2 80 mL of the mixed solution of O solution and 240 mL of KOH solution with a concentration of 1 mol / L were mixed, 1.5 mL of the crystal habit modifier ethylenediamine was added to adjust the pH to 3.5, stirred evenly, transferred to an autoclave, and reacted at 160 ° C for 1 h to obtain a solid The phase product is boehmite nano whiskers;

[0069] b. The boehmite nano-whisker solid-liquid system is suction-filtered, rinsed once, dried at 85°C, and ground into powder;

[0070] c. Soak the powder prepared in step b with a ratio of solid to water mass ratio of 1:10, ultrasonicate for 40 minutes, and place for 48 hours; then filter with suction, dry at 85°C, and ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of boehmite nanocrystallines. The method comprises the following steps of 1). putting seed crystals of the boehmite nanocrystallines in a Barer process mother solution, inducing to crystallize for 2-6 hours at a constant temperature of 70-90 DEG C, and cooling to a room temperature naturally; 2). suction filtering the crystallized product, leaching 1-3 times, drying at a temperature of 80-90 DEG C, and grinding into powder; 3) immersing the powder obtained from the step 2), dissolving for 40-60 min with ultrasound, placing for 24-48 hours, suction filtering, drying at a temperature of 80-90 DEG C, and grinding into powder; and 4) repeating the step 3) at least one time to obtain the boehmite nanocrystallines. The invention also discloses a preparation method of boehmite nanowhiskers. The boehmite nanocrystallines or nanowhiskers are prepared by using high-pure boehmite nanocrystallines or nanowhiskers as the seed crystals, and performing induced crystallization on the Barer process mother solution. The method is simple in operations, without any toxic material generated, prevents pollutions to the environment, and is convenient for industrialized popularization. The obtained boehmite nanocrystallines or nanowhiskers has the characteristics of high purity and nanoscale, and has wide applications.

Description

technical field [0001] The invention relates to a method for preparing boehmite nano crystals or nano whiskers, belonging to the field of nano materials. Background technique [0002] Boehmite, also known as boehmite, is often used as the precursor of alumina, and because of its own crystal structure, crystal morphology and other characteristics, it is widely used in aluminum hydroxide-induced crystallization seeds, Inorganic flame retardants, paper-making fillers, cementing agents for amorphous refractories, magnesium-aluminum spinels, chemical raw materials, and other fields. [0003] The commonly used synthesis methods of boehmite nanocrystals mainly include inorganic salt hydrolysis, organic complex hydrolysis, organic alkoxide hydrolysis, carbonization, sol-gel method, and hydrothermal method, but these methods prepare boehmite nanocrystals. method is more complicated. [0004] The preparation of boehmite by induced crystallization with Bayer process mother liquor is ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02B82Y30/00
Inventor 许荣辉吴世杰陈文娟柳勇苌清华王斌谢占杰
Owner HENAN UNIV OF SCI & TECH