Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for forced mixing fabric to reduce sodium content in aluminum hydroxide powder

A technology of aluminum hydroxide and forced mixing, which is applied in the preparation of alkali metal aluminate/alumina/aluminum hydroxide, can solve the problems of high and wide sodium content, accompanied by the formation of large particles, and unsatisfactory application effects. Achieve the effects of reducing sodium content, narrowing the range of particle size distribution, and improving the relative uniformity of distribution

Active Publication Date: 2019-04-19
贵州博汇联润铝业有限公司
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, aluminum hydroxide production technology has developed rapidly in China, which has greatly improved the technical level of aluminum hydroxide micropowder preparation, and the particle size, oil absorption rate and whiteness of the product have reached a high level. , For example: the particle size of aluminum hydroxide powder can reach 1-2μm, but the particle size distribution is wide, accompanied by the formation of large particles; the oil absorption rate of the product is maintained above 40ml / 100g, and after recent years of efforts, aluminum hydroxide The quality of micropowder has been greatly improved, and the defects of wide particle size distribution and high oil absorption rate have been solved
However, most of them tend to study the indicators such as particle size, oil absorption rate, whiteness, etc., so that those skilled in the art ignore the research on hidden indicators such as crystal morphology and application performance, resulting in the frequent occurrence of sodium content in the application process of aluminum hydroxide micropowder. High defects, resulting in unsatisfactory application effect

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
  • Method for forced mixing fabric to reduce sodium content in aluminum hydroxide powder
  • Method for forced mixing fabric to reduce sodium content in aluminum hydroxide powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of seed crystal solution: After mixing aluminum hydroxide and water with 100g of aluminum hydroxide and 100g of water, use a cell mill to grind for 1 hour according to the operation method of the cell mill; adjust the temperature of the seed crystal solution at 100°C, and use an ultrasonic frequency of 60kHz Use immediately after processing for 7 minutes;

[0023] Take aluminum hydroxide, sodium hydroxide, and water at a mass ratio of 1:1:3, prepare a mixed solution at a temperature of 40°C, and add the seed solution to the mixed solution (1kg) by 0.001 times the mass of the mixed solution (1000kg). In the solution, place it in the seed sub-tank at 60°C for decomposition, separate the decomposed slurry from the mother liquor, wash it, and dry it at 40°C for 20 minutes to obtain aluminum hydroxide micropowder.

Embodiment 2

[0025] On the basis of Example 1, after the seed solution is added to the seed sub-trough and mixed with the mixed solution, the mixed material in the seed sub-trough is lifted to the forced mixer at the top of the seed sub-trough by a feeder, and a 2000r / min Stirring speed After mixing for 15 minutes, the solution in the forced mixer is dropped into the seed separation tank by its own gravity to decompose and separate aluminum hydroxide micropowder.

Embodiment 3

[0027] On the basis of Example 1, after the seed solution is added to the seed sub-trough and mixed with the mixed solution, the mixed material in the seed sub-trough is lifted to the forced mixer at the top of the seed sub-trough by a feeder, and a 3000r / min Stirring speed After mixing for 20 minutes, the solution in the forced mixer is dropped into the seed separation tank by its own gravity to decompose and separate aluminum hydroxide powder.

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 relates to the field of aluminum hydroxide powder quality improvement, and especially relates to a method for forced mixing fabric to reduce sodium content in aluminum hydroxide powder.The method adopts a forced mixer to perform stirring and mixing under a stirring speed of 1,000-3,000 r / min, and secondary mixing can be realized by utilizing the self-gravity of a solution to drop into a seed splitting tank, so that the relative distribution uniformity of the seed solution in an aluminum hydroxide containing mixed solution or a saturated sodium aluminate solution can be enhanced,uniform particles of the aluminum hydroxide powder can be guaranteed, the particle size distribution range of the aluminum hydroxide powder can be shrunk, and therefore, the particle size of the prepared aluminum hydroxide powder can be maintained between 2-5 [mu]m, sodium content can be reduced, and the quality of the aluminum hydroxide powder can be enhanced to a great extent.

Description

technical field [0001] The invention relates to the field of improving the quality of aluminum hydroxide micropowder, in particular to a method for reducing the sodium content of aluminum hydroxide micropowder through forced mixing of cloth. Background technique [0002] Aluminum hydroxide micropowder is widely used in flame retardant, filler and other fields; currently, the preparation of aluminum hydroxide micropowder is obtained by decomposing sodium aluminate solution to obtain aluminum hydroxide slurry, which is then separated by a filter and washed twice with hot water. , for example, Patent No. 201610171923.2 discloses the use of carbonated sodium aluminate solution to obtain aluminum hydroxide seed crystals and add them to the sodium aluminate solution, and decompose the seeds at different temperatures to obtain decomposed slurry, iron removal, depolymerization, and removal of Moisture, dispersed and graded to obtain micropowder aluminum hydroxide; carbonation treatm...

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
IPC IPC(8): C01F7/14
CPCC01F7/14C01P2004/61C01P2006/80
Inventor 刘俊良刘荣心姚亮
Owner 贵州博汇联润铝业有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com