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The Influence and Reacitive Crystallization Kinetics of Nesquehonite

Author: ShaoPingPing
Tutor: MiJianGuo
School: Beijing University of Chemical Technology
Course: Chemical Engineering and Technology
Keywords: Sanshui magnesium carbonate MgCO3 · 3H2O MSMPR mold Reactive crystallization kinetics Nucleation rate Growth rate
CLC: TQ132.2
Type: Master's thesis
Year: 2010
Downloads: 151
Quote: 1
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Abstract


Magnesium sulfate for our rich resources , the paper proposes a solution of a sodium carbonate as the precipitating agent preparation Sanshui magnesium carbonate crystals . The influence of the reaction temperature, the rate of dropwise addition of the precipitating agent , and the initial concentration of the raw material of the product , thus found that when the rod can be obtained when the reaction temperature below 313K trihydrate crystal magnesium carbonate (MgCO3 · 3H2O) , when the reaction temperature Above 323 K , the product becomes a spherical basic magnesium carbonate, by Sanshui magnesium carbonate , and its particle size becomes large as the reaction temperature rises . The most MgCO3 · 3H2O crystal growth and particle size results show that dropwise addition rate and the initial concentration of the reactants in addition to the reaction temperature have a significant impact on the product obtained under different conditions characterized by XRD and SEM . Sanshui magnesium carbonate as the preparation of the magnesium oxide precursor , its final product particle size and the nature of the magnesia has a significant positive association . Therefore using continuous crystallization (MSMPR) is using the reaction of the steady-state method Sanshui magnesium carbonate crystallization kinetics study , the population balance equation for the theoretical basis , Sanshui, magnesium carbonate crystal grains density distribution measured by the experiment data , respectively, using in Bransom, CR, ASL, MJ2 and MJ3 model fitting . Experimental and population density by model fitting for comparative analysis, can be found MJ3 particle size growth rate model is the most suitable to predict the Sanshui magnesium carbonate crystal growth model . Further analysis of the study to determine the the Sanshui magnesium carbonate crystal growth rate equation .

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CLC: > Industrial Technology > Chemical Industry > Inorganic compounds, the chemical industry of the metal elements > Section II group metal elements of inorganic compounds > Inorganic compounds of magnesium
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