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Preparation method for aluminum zinc phosphate

A kind of technology of aluminum zinc phosphate and zinc dihydrogen phosphate

Inactive Publication Date: 2019-03-29
JIANGSU SHENLONG ZINC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing aluminum-zinc phosphate preparation process has an unreasonable design, and the finished product of aluminum-zinc phosphate has low quality, low efficiency, and large loss of raw materials for the finished product. Therefore, based on the above problems, the present invention provides a kind of aluminum-zinc phosphate Preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The preparation method of a kind of aluminum zinc phosphate of the present invention comprises the following steps, step 1, put a certain amount of zinc oxide and an appropriate amount of water into the reaction kettle through the material box, gently stir to obtain zinc oxide slurry, and heat to 55- 65°C, stirring for 24h. Step 2. Put a certain amount of alumina and phosphoric acid into the reaction kettle, slowly add to 90-120°C, react to obtain a zinc dihydrogen phosphate solution, and the concentration of the zinc dihydrogen phosphate solution is 48%-65%. Step 3. Add the zinc dihydrogen phosphate solution into the zinc oxide reaction kettle in batches, and continue the reaction and precipitation. The reaction time is 6-8 hours. Step 4. Transfer the reacted feed liquid to a centrifuge through a pipeline, remove moisture and impurities, and neutralize the pH value, which ranges from 4.8 to 6. Step 5, drying the obtained water-containing solid through a drier, and con...

Embodiment 2

[0014] The preparation method of a kind of aluminum zinc phosphate of the present invention comprises the following steps, step 1, put a certain amount of zinc oxide and an appropriate amount of water into the reaction kettle through the material box, gently stir to obtain zinc oxide slurry, and heat to 58- 63°C, stirring for 20-24h. Step 2. Put a certain amount of alumina and phosphoric acid into the reaction kettle, slowly add to 95-110°C, react to obtain a zinc dihydrogen phosphate solution, and the concentration of the zinc dihydrogen phosphate solution is 50%-62%. Step 3. Add the zinc dihydrogen phosphate solution into the zinc oxide reaction kettle in batches, and continue the reaction and precipitation. The reaction time is 6.5-7.5 hours. Step 4. Transfer the reacted feed liquid to a centrifuge through a pipeline, remove moisture and impurities, and neutralize the pH value, which ranges from 4.9 to 5.8. Step 5, drying the obtained water-containing solid through a drier...

Embodiment 3

[0016] The preparation method of a kind of aluminum zinc phosphate of the present invention comprises the following steps, step 1, put a certain amount of zinc oxide and an appropriate amount of water into the reaction kettle through the material box, gently stir to obtain zinc oxide slurry, and heat to 60- 62°C, stirring for 22-23h. Step 2. Put a certain amount of alumina and phosphoric acid into the reaction kettle, slowly add to 100-105°C, react to obtain a zinc dihydrogen phosphate solution, and the concentration of the zinc dihydrogen phosphate solution is 55%-60%. Step 3. Add the zinc dihydrogen phosphate solution into the zinc oxide reactor in batches, and continue the reaction and precipitation. The reaction time is 6-7h; Step 4. Transfer the reacted material liquid to the centrifuge through the pipeline to remove water 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 moistur...

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Abstract

The invention belongs to the technical field of production of aluminum zinc phosphate, and specifically discloses a preparation method for the aluminum zinc phosphate. The preparation method comprisesthe following steps: step 1, adding a certain amount of zinc oxide and a proper amount of water into a reaction kettle through a feed box, and carrying out slow stirring so as to obtain a zinc oxideslurry; step 2, adding certain amounts of aluminum oxide and phosphoric acid into the reaction kettle; step 3, adding a zinc dihydrogen phosphate solution into a zinc oxide reaction kettle in batches;step 4, transferring a reacted feed liquid to a centrifuge through a pipeline so as to remove moisture and impurities; step 5, drying an obtained water-containing solid through a dryer; and step 6, allowing a dried solid to pass through a crushing device and a gas cyclone device so as to obtain qualified aluminum zinc phosphate. The preparation method for the aluminum zinc phosphate provided by the invention has the following beneficial effects: the preparation process for the aluminum zinc phosphate is reasonable in flow design; a finished aluminum zinc phosphate product has high quality andhigh production efficiency; the loss of raw materials for preparation of the aluminum zinc phosphate is reduced; economic benefit is improved; and the cost of labor is saved.

Description

technical field [0001] The invention belongs to the technical field of zinc powder production, and in particular relates to a preparation method of aluminum zinc phosphate. Background technique [0002] Dark gray powdered metal zinc can be used as a pigment with strong hiding power, good anti-rust and atmospheric corrosion resistance, and is often used to make anti-rust paint and strong reducing agent. [0003] Aluminum zinc phosphate is mainly used in the preparation of various water-resistant, acid-resistant and anti-corrosion coatings in various paint-based coatings, such as solvent-based coatings, water-based coatings, special coatings, phenolic acid paints, epoxy paints, internal vinyl acid paints, thick Paddle paints and water-soluble resin paints are also widely used in antirust paints for ships, automobiles, industrial machinery, light metals, household appliances, and metal containers for food. [0004] The existing aluminum-zinc phosphate preparation process has a...

Claims

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Application Information

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IPC IPC(8): C01B25/45
CPCC01B25/45
Inventor 戴鹏
Owner JIANGSU SHENLONG ZINC IND
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