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Taking the saline lake bischofite and NH4Cl that was removed with the ammonia method and continuously followed by filtration as raw materials with a molar ratio of 1 : 1 of MgCl2 to NH4Cl, ammonium carnallite was synthesized. And then the ammonium carnallite was dehydrated to some extent at 160 °C for 4 h. Ammonium carnallite reacted with ammonia at 240 °C for 150 min and the ammonation ammonium carnallite...
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