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

Monocrystal type aluminum hydroxide production method

A technology of aluminum hydroxide and single crystal, applied in the directions of alumina/aluminum hydroxide, chemical instruments and methods, single crystal growth, etc., can solve the problems of obtaining aluminum hydroxide with higher purity and poor filtration performance.

Active Publication Date: 2006-05-10
中铝郑州有色金属研究院有限公司
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to be able to extract this part of alumina, the predecessors have carried out research on the deep decomposition of the mother liquor of carbon fraction, but the decomposition product is mainly franconite and has poor filtration performance
At present, there is no method to obtain aluminum hydroxide with high purity from industrial carbon fraction mother liquor

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

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0014] At a temperature of 70°C, a time of 3h, a seed coefficient of 0.5, and carbon dioxide CO 2 Under the conditions of 35%, the ventilation rate is 60% of the total ventilation rate in the first hour, 30% in the second hour, and 10% in the third hour, the carbon fraction mother liquor is deeply carbonized, and the decomposition rate of the carbon fraction mother liquor reaches 99.3%. The separated products are filtered and washed, and the deep carbon separation mother liquor is sent to the evaporation process.

example 2

[0016] At temperature 85°C, time 3.5, seed coefficient 1, carbon dioxide CO 2 Under the conditions of 25%, the air flow is 80% of the total air flow in the first hour, and 20% in the next 2.5 hours, the carbon separation mother liquor is deeply carbonized, the decomposition rate of the carbon separation mother liquor reaches 99.5%, and the deep carbon separation product is filtered and washed , the deep carbon separation mother liquor is sent to the evaporation process.

example 3

[0018] At a temperature of 95°C, a time of 2h, a seed coefficient of 4, and carbon dioxide CO 2 Under the conditions of 38%, the air flow is 70% of the total air flow in the first hour, and 30% in the second hour, the carbon separation mother liquor is deeply carbonized, the decomposition rate of the carbon separation mother liquor reaches 98.6%, and the deep carbon separation product is filtered and washed , the deep carbon separation mother liquor is sent to the evaporation process.

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
decomposition efficiencyaaaaaaaaaa
decomposition efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention relates to preparation of aluminum hydroxide with alumina carbonization precipitation by sintering process or combining process, especially to a method for preparation of single-crystal aluminum hydroxide. It is characterized in that in the process, the industrial carbonization precipitation is used as decomposition solution to be added with seed crystal for carbonation, the decomposition temperature is 60-100 Deg. C, the time is 0.5-5h, the seed crystal coefficient is 0.1-10, and the ventilation volume in the first reaction hours is 60-85% of the whole ventilation volume. With the invented method, the cycle volume of residual aluminum oxide from carbonization precipitation highly is decreased in the sintering-process system, the cycle efficiency is improved, the rate of dissolution of carbonization precipitation is improved from about 90% to 99%, and the yield is increased. The deep carbonization product converts into a new product single-crystal aluminum hydroxide, which is characterize in that the graininess is even, the oil-absorbent ratio is low, and it is micro-flour filler having good property.

Description

technical field [0001] The invention relates to a method for producing single-crystal aluminum hydroxide, which involves producing aluminum hydroxide from aluminum oxide carbon fraction mother liquor by sintering method or combined method, especially a method for producing single-crystal aluminum hydroxide. Background technique [0002] In order to ensure the chemical quality of the product, my country's sintered carbon division controls the decomposition rate according to the A / S of the semen. The general decomposition rate is about 90%. The industrial carbon product is polycrystalline aluminum hydroxide with a wide particle size distribution. The mother liquor 8-15g / l of alumina remains in the production process, and the circulation efficiency of the mother liquor is low. In order to be able to extract this part of alumina, the predecessors have carried out research on the deep decomposition of carbon fraction mother liquor, but the decomposition product is mainly franzalit...

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 Applications(China)
IPC IPC(8): C01F7/02C30B29/20
Inventor 顾松青杨志民娄世彬杨桂丽赵铁梅张占明张立强李光柱赵培生吕鲜翠
Owner 中铝郑州有色金属研究院有限公司