Effect of SO2-4 on Preparation of Magnesium Hydroxide by Electrode Position

doi:10.12068/j.issn.1005-3026.2020.10.008

Abstract

Abstract: Using the by-product of magnesium chloride from titanium sponge as a raw material， the magnesium hydroxide ［Mg(OH)₂］ prepared by the aqueous solution electrode position method was agglomerated dramatically and it was difficult to fall from the electrode plate. By adding a certain amount of SO^2-₄ into the electrolyte to improve the dispersion of Mg(OH)₂， the serious agglomeration can be avoided effectively. The effect of SO^2-₄ on the shedding performance， product morphology and growth mode of Mg(OH)₂ was studied. The results show that the SO^2-₄ concentration has a great influence on the initial shedding time of Mg(OH)₂. When the SO^2-₄ concentration is 0.45g/L， the performance of Mg(OH)₂ is the best， associated with the initial shedding time about 10min. When the Mg(OH)₂ crystals grow on the electrode plate， the growth mode is the layered-island composite growth. Meanwhile， it is also found that the addition of SO^2-₄ can induce the Mg(OH)₂ to grow in a stepped manner.

Key words: SO^2-₄, electrode position, magnesium hydroxide, agglomeration, growth mode

CLC Number:

TF111.52+1

DI Yue-zhong， MA Guang-chao， SHEN Zi-qiang， CUI Zhi-chun. Effect of SO^2-₄ on Preparation of Magnesium Hydroxide by Electrode Position[J]. Journal of Northeastern University Natural Science, 2020, 41(10): 1415-1420.

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Effect of SO^2-₄ on Preparation of Magnesium Hydroxide by Electrode Position

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