Ammonium carnallite dehydrated material and method for preparing magnesium electrolyte melt by using ammonium carnallite dehydrated material
An ammonium carnallite and electrolyte technology, which can be used in chloride preparation, ammonia preparation/separation, chemical instruments and methods, etc., can solve the problems of high content of hydrolyzate, hindering large-scale industrial production, low heat transfer efficiency, etc.
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Embodiment 1
[0062] 100g of potassium chloride was used as raw material to prepare potassium chloride melt at 800°C, and 30g of ammonium carnallite dehydrated material 1.2NH 4 Cl•MgCl 2 •0.5H 2 O (particle size distribution: >1.43mm material accounts for 20wt.%, 0.9-1.43mm material accounts for 20wt.%, 0.3-0.9mm material accounts for 50wt.%, 0.1-0.3mm material accounts for 10wt.%) spread on the above chlorinated above the potassium melt. Wherein, the ratio of the height of the ammonium carnallite dehydrated material column to its diameter is 0.5, and the ratio of the diameter of the ammonium carnallite dehydrated material column to the diameter of the chloride melt material is 0.5. The ammonium carnallite dehydrated material is first heated at 250°C for 0.5 hours, then heated at 400°C for 0.1 hour, then heated at 550°C for 0.5 hour, and finally heated at 700°C for 1.0 hour, and keep the ammonia and gas above the dehydrated material during the heating process. The sum of the partial pres...
Embodiment 2
[0066] Prepare sodium chloride melt with 100g sodium chloride at 800°C, and 35g ammonium carnallite dehydrated material 1.0NH 4 Cl•MgCl 2 •0.6H 2 O (particle size distribution: >1.43mm material accounts for 18wt.%, 0.9-1.43mm material accounts for 25wt.%, 0.3-0.9mm material accounts for 52wt.%, 0.1-0.3mm material accounts for 5wt.%) spread on the above chloride above the melt. Wherein, the ratio of the height of the ammonium carnallite dehydrated material column to its diameter is 1.0, and the ratio of the diameter of the ammonium carnallite dehydrated material column to the diameter of the chloride melt material is 0.3. The ammonium carnallite dehydrated material is first heated at 280°C for 1.5 hours, then heated at 370°C for 2.0 hours, then heated at 530°C for 1.0 hour, and finally heated at 650°C for 0.1 hour, and keep the ammonia and gas above the dehydrated material during the heating process. The sum of the partial pressures of hydrogen chloride is 30kpa, and a high-...
Embodiment 3
[0070] Prepare a chloride melt with 55g potassium chloride and 45g sodium chloride at 750°C, and 40g ammonium carnallite dehydrated material 1.4NH 4 Cl•MgCl 2 • 0H 2 O (particle size distribution: >1.43mm material accounts for 30wt.%, 0.9-1.43mm material accounts for 17wt.%, 0.3-0.9mm material accounts for 51wt.%, 0.1-0.3mm material accounts for 2wt.%) spread on the above chloride above the melt. Wherein, the ratio of the height of the ammonium carnallite dehydrated material column to its diameter is 10.0, and the ratio of the diameter of the ammonium carnallite dehydrated material column to the diameter of the chloride melt material is 0.7. The ammonium carnallite dehydrated material is first heated at 300°C for 0.1 hour, then heated at 350°C for 0.05 hour, then heated at 500°C for 0.2 hour, and finally heated at 720°C for 2.0 hours, and keep the ammonia and gas above the dehydrated material during the heating process. The sum of the partial pressures of hydrogen chloride ...
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