Preparation method for aluminum zinc phosphate
A kind of technology of aluminum zinc phosphate and zinc dihydrogen phosphate
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[0011] Example one
[0012] The preparation method of aluminum zinc phosphate of the present invention includes the following steps. Step 1. Put a certain amount of zinc oxide and an appropriate amount of water into a reaction kettle through a material box, and gently stir to obtain a zinc oxide slurry, which is heated to 55- Stir at 65°C for 24h. Step 2. Put a certain amount of alumina and phosphoric acid into the reaction kettle, slowly add it to 90-120°C, and react to obtain a zinc dihydrogen phosphate solution. The concentration of the zinc dihydrogen phosphate solution is 48%-65%. Step 3. Add the zinc dihydrogen phosphate solution to the zinc oxide reactor in batches, and continue to react and precipitate, and the reaction time is 6-8 hours. Step 4. Transfer the reacted material liquid to the centrifuge through the pipeline to remove moisture and impurities, and neutralize the PH value, the PH value range is 4.8-6. Step 5. Dry the obtained water-containing solid through a ...
Example Embodiment
[0013] Example two
[0014] The preparation method of aluminum zinc phosphate of the present invention includes the following steps. Step 1. Put a certain amount of zinc oxide and an appropriate amount of water into the reaction kettle through a material box, gently stir to obtain a zinc oxide slurry, and heat to 58- Stir at 63°C for 20-24h. Step 2. Put a certain amount of alumina and phosphoric acid into the reaction kettle, slowly add it to 95-110°C, and react to obtain a zinc dihydrogen phosphate solution. The concentration of the zinc dihydrogen phosphate solution is 50%-62%. Step 3. Add the zinc dihydrogen phosphate solution to the zinc oxide reactor in batches, and continue to react and precipitate, and the reaction time is 6.5-7.5h. Step 4. Transfer the reacted material liquid to a centrifuge through a pipeline to remove moisture and impurities, and neutralize the PH value, which ranges from 4.9-5.8. Step 5. Dry the obtained water-containing solid through a dryer, and co...
Example Embodiment
[0015] Example three
[0016] The preparation method of aluminum zinc phosphate of the present invention includes the following steps. Step 1. Put a certain amount of zinc oxide and an appropriate amount of water into a reaction kettle through a material box, gently stir to obtain a zinc oxide slurry, and heat to 60- Stir at 62°C for 22-23h. Step 2. Put a certain amount of alumina and phosphoric acid into the reaction kettle, slowly add to 100-105°C, and react to obtain a zinc dihydrogen phosphate solution, the concentration of which is 55%-60%. Step 3. Add the zinc dihydrogen phosphate solution to the zinc oxide reactor in batches, and continue to react and precipitate, and the reaction time is 6-7h; Step 4. Transfer the reacted liquid to the centrifuge through the pipeline to remove moisture and impurities , Neutralize the PH value, the PH value range is 5-5.5; Step 5, the obtained water-containing solid is dried by a dryer, and the water content is controlled in the range of ...
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