Hebei Messi Biology Co., Ltd. invention disclosed a petroleum catalyst special magnesium oxide production process, including the following steps: to anhydrous magnesium chloride with water to dissolve for the removal of impurities to remove the calcium, sulfate, iron, manganese, and then add the extractant in the acidic medium with H + ions, followed by the passage of high purity carbon dioxide, the formation of magnesium bicarbonate pyrolysis at low temperature conditions, and ultrasonic assisted pulverization, the generation of 8MgCO3-Mg(OH)2-2H2O. Generate 8MgCO3-Mg(OH)2-2H2O, and finally filtering, washing, the generated filter cake in the lock-type kiln calcination and maintain a certain heating curve can be obtained catalyst special magnesium oxide.
The magnesium oxide produced by this invention meets the following conditions: the content of magnesium oxide is more than 98%, the content of calcium oxide is less than 0.5%, the content of iron is less than 3 ppm, the manganese is less than 3 ppm, the Cl- is less than 0.01%, the SO42- is less than 0.01%, and the particle size of the product is D50<3 microns, D90<12 microns The particle size distribution of the product is double wave peaks, and the morphology of the product is characterized by hexahedron, and the citric acid value is in the range of 200 seconds to 250 seconds. Thus effectively avoid the occurrence of bubble phenomenon in the reaction process, effectively avoid the formation of small particles in the reaction slurry due to the addition of magnesium oxide activity is too high, and then make the generated slurry uniform, no particle formation.
Hebei Messi Biology Co., Ltd. said, through the magnesium oxide particle size product particle size control in the D50 <3 microns, D90 <12 microns, and particle size distribution of the double wave peaks, thus making the addition of magnesium oxide slurry has been to maintain a dilute state will not suddenly thickened, which not only effectively reduces the reaction equipment required for the power, but also effectively avoided due to a large number of semi-finished products stained in the reaction tank and the resulting cleaning difficulties, thus effectively ensuring that the production of the production of the slurry is uniform, no particle formation. This not only effectively reduces the power required by the reaction equipment, but also effectively avoids the difficulty of cleaning caused by a large number of semi-finished products stained on the reaction tank, thus effectively ensuring the normal production. By making the crystal shape of magnesium oxide into hexahedron, the friction coefficient of the product and the hardness and adsorption capacity of the product are effectively increased.