Ammonium carnallite was synthesized by using MgCl2 and NH4Cl,which obtained by the saline lake bischofite and filtrate stock of deposit magnesium by ammonia respectively,at molar ratio of 1:1.Then the ammonium carnallite had been dehydrated to some extent at 160℃ for 4h.The dehydrated ammonium carnallite was dissolved in methanol under low temperature by feeding ammonia,preparing ammoniation magnesium chloride.The kinetics of non-isothermal decomposition was studied for ammoniation magnesium chloride.The process of ammoniation magnesium chloride to eliminate ammonia in the temperature range 78～246℃ can be described by the model of Ginstling-Brounshtein {f(α)=1.5[(1-α)-1/3-1]-1,g(α)=(1-2α/3)-(1-α)2/3}.The kinetic equation is dα/dt= 1.5Ae-E/RT [(1-α)-1/3-1]-1.The processes of ammoniation magnesium chloride to eliminate ammonia within 246～299℃ can be described by the model of Zhuralev,Lesoki and Tempelman {f(α)= 1.5(1-α)4/3[(1-α)-1/3-1]-1,g(α)= [(1-α)-1/3-1]2}.The kinetic equation is dα/dt= 1.5Ae-E/RT(1-α)4/3[(1-α)-1/3-1]-1.The kinetics equations and parameters provided valuable data for ammonition magnesium chloride to produced anhydrous magnesium chloride.
