Study On Processing Of Calcium Acetate Preparation Useing Eggshell

The study of this article is optimization process of preparing calcium acetate with egg shells for basic material ,the method of which is , respectively, ultrasonic wave-assisted,microwave-assisted and magnetic-assisted,meanwhile,determinating quality products of Preparation of calcium acetate. By a single factor in the different conditions of preparation of the results to determine the orthogonal factors.This article obtains optimium technology condition ang parameters. The major findings are as follows:1. The optimium parameters for separation test of shell membrane is : mixing time for 15min, standing time for 15min, stirring for 2 times.2. The optimium parameters for ultrasonic wave-assisted to prepare calcium acetate is : Feeding for 10.051g, reaction time for 1.5h, reaction temperature for 30℃, ultrasonic power for 100W, ultrasonic time for 2min, calcium hydroxide for 3.5g, temperature of getting rid of magnesium for 80℃, time of getting rid of magnesium for 10min, the optimium ratio of liquid and solid for 1:14 .under this process conditions, the yield of calcium acetate can reach 95.93%.3. The optimium parameters for microwave-assisted to prepare calcium acetate is : reaction time for 2.5h, the microwave power for 800W, Microwave time for 2min, the ratio of liquid and solid for 1:18, the temperature of getting rid of magnesium for 85℃, ang time for 15min . under this process conditions ,the yield of calcium acetate can reach 94.88%4. The optimium parameters for magnetic-assisted to prepare calcium acetate is : reaction time for 1.5h, the magnetic field strength for 8000Gs, magnetization time for 80min, the ratio of liquid and solid for 1:12, the temperature of getting rid of magnesium for 80℃, and time for 15 min .under this process conditions, the yield of calcium acetate can reach 94.15%5. Determinating quality products of Preparation of calcium acetate, the yield of calcium acetate can reach 89.55~92.44%; content for calcium acetate is higher than 98.5%,the color of which is white,and smellsof which is slightly acidic; the content of magnesium is less than 0.0015%; the content of lead is less than 0.0007%; the content of arsenic is less than 0.0003%; Loss on drying,water soluble test are both satisfactory; free acid, free alkali, volatile fatty acids are all qualified. Calcium acetate from products meet with national standards, which are safe and reliable,and can be used for food, medicine and other industries.