One-step preparing magnesium hydroxide particles from mother liquor of salt production

2nd International Conference on New Material and Chemical Industry

材料科学;化学工业

Guo, H.^1,2 ; Peng, C.S.^1 ; Ding, Z.W.^2 ; Yuan, H.T.^1 ; Yang, K.^1

Key Laboratory of Marine Environment and Ecology, Ministry of Education, College of Environmental Science and Engineering, Ocean University of China, Qingdao

266100, China^1

Beijing Institute of High-tech Environmental Science, Beijing

101111, China^2

关键词: Crystal morphologies;    Dispersibilities;    Magnesium hydroxide particles;    Median particle diameters;    Operating condition;    Optimum conditions;    Reacting temperature;    Salt production;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/292/1/012015/pdf
DOI  :  10.1088/1757-899X/292/1/012015

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this study, MH particles were prepared from mother liquor of salt production in one-step through employing ammonia gas as precipitant and stearic acid as dispersant respectively. Since adopting microporous plate to bubble ammonia gas, the percent conversion of magnesium was boosted obviously. The influence of operating condition of reacting temperature, stirring rate, ammonia flowrate and pore size of plate to magnesium percent conversion were investigated, the maximum is 88.1 % at optimum condition according to experimental results. The MH particle preparing from mother liquor in optimum condition was characterized by XRD, the result indicated the volume of brucite was reach to 99.7% within the composition of the product. In addition, the size distribution and crystal morphology was also detected, the median particle diameter d50 is 883 nm and possessing good dispersibility. From the thermogravimetric analysis of MH particles, the thermostability of product is suitable as flame-retardant composite materials.