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Preparation method for ammonium-polyphosphate-doped magnesium aluminium hydrotalcite

A technology of ammonium magnesium aluminum polyphosphate and talc, which is applied in the direction of hydrotalcite, alumina/aluminum hydroxide, etc., and can solve problems such as complex process, unsuitable for large-scale production, and small output

Inactive Publication Date: 2015-05-06
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, common synthetic hydrotalcites include hydrothermal method, electrochemical method, ion exchange method, etc. These methods are complicated in process, time-consuming, and low in output, and are not suitable for large-scale production. The present invention discloses a hydrothermal method doped with ammonium polyphosphate The preparation of talc, the method and method are economical to use, low in cost, simple in process, high in efficiency, high in quality, and easy for industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Weigh 25.5g of magnesium sulfate and 37.5g of aluminum nitrate and grind them fully in a mortar for 30 minutes, add 100mL of deionized water in a three-necked reaction bottle, put the ground mixed powder into it for dissolution, add sodium hydroxide and Anhydrous sodium carbonate solution, keep the pH at 9, reduce the magnetic force by half at room temperature for 20 minutes, add 20g urea and 30mL deionized water, raise the temperature to 50°C and stir for 1 hour, after the reaction is complete, put the slurry in a microwave extractor , 500W, at 150°C, crystallize for 5 minutes, take out the crystals, dry and grind them into powder, put them into the reaction bottle, add 100mL ion-free water, 20mL APP, heat to 120°C, stir slowly, and put them in the pot after the reaction Aging in medium for 10 hours, cooling to room temperature, drying in an oven to obtain magnesium aluminum ammonium polyphosphate hydrotalcite doped, put 20g of magnesium aluminum ammonium polyphosphate ...

example 2

[0022] Weigh 25.5g of magnesium sulfate and 37.5g of aluminum nitrate and grind them fully in a mortar for 50 minutes, add 100mL of deionized water in a three-necked reaction bottle, put the ground mixed powder into it for dissolution, add sodium hydroxide and Anhydrous sodium carbonate solution, keep the pH at 11, reduce the magnetic force by half at room temperature for 20 minutes, add 20g urea and 30mL deionized water, raise the temperature to 50°C and stir for 1 hour, after the reaction is complete, put the slurry in a microwave extractor , 500W, at 150°C, crystallize for 5 minutes, take out the crystals, dry and grind them into powder, put them into the reaction bottle, add 100mL ion-free water, 20mL APP, heat to 120°C, stir slowly, and put them in the pot after the reaction Aging in medium for 10 hours, cooling to room temperature, drying in an oven to obtain magnesium aluminum ammonium polyphosphate hydrotalcite doped, put 20g of magnesium aluminum ammonium polyphosphate...

example 3

[0024] Weigh 25.5g of magnesium sulfate and 37.5g of aluminum nitrate and grind them fully in a mortar for 60 minutes, add 100mL of deionized water in a three-necked reaction bottle, put the ground mixed powder into it for dissolution, add sodium hydroxide and Anhydrous sodium carbonate solution, keep the pH at 12, reduce the magnetic force by half at room temperature for 20 minutes, add 20g urea and 30mL deionized water, raise the temperature to 50°C and stir for 1 hour, after the reaction is complete, put the slurry in a microwave extractor , 500W, at 150°C, crystallize for 5 minutes, take out the crystals, dry and grind them into powder, put them into the reaction bottle, add 100mL ion-free water, 20mL APP, heat to 120°C, stir slowly, and put them in the pot after the reaction Aging in medium for 10 hours, cooling to room temperature, drying in an oven to obtain magnesium aluminum ammonium polyphosphate hydrotalcite doped, put 20g of magnesium aluminum ammonium polyphosphate...

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Abstract

The invention discloses a preparation method for ammonium-polyphosphate-doped magnesium aluminium hydrotalcite. The preparation method comprises: fully grinding magnesium sulfate and aluminium nitrate in a mortar, putting the grinded mixed powder into deionized water for dissolving, adding sodium hydroxide and an anhydrous sodium carbonate solution with stirring, keep pH at 9-12, performing magnetic stirring at room temperature for 20 min, then adding urea and deionized water, heating to 50 DEG C and stirring for 1 h, after the reaction is finished, putting the slurry into a microwave extraction instrument, controlling the power to be 500 W, crystallizing at 150 DEG C, drying, grinding into a powder, putting the crystal powder into a reaction flask, adding deionized water and APP, heating to 120 DEG C, slowly stirring, after the reaction is finished, ageing in the pot for 10 h, cooling and drying, so as to obtain ammonium-polyphosphate-doped magnesium aluminium hydrotalcite. The method is economic and practical, low in cost, simple in technology, high in efficiency and high in quality.

Description

technical field [0001] The invention belongs to the field of fine chemical industry and relates to a preparation method of magnesium aluminum hydrotalcite doped with ammonium polyphosphate. Background technique [0002] Hydrotalcite is a layered columnar double-lead complex metal oxide (LDC). The hydrotalcite mineral was first discovered in Switzerland in 1842. Hydrotalcite has a layered anion layer structure, lamellar cation compatibility and unique anion exchangeability. Therefore, by modulating metal ions and anions, unit assembly is realized. diversification. Over the years of research on hydrotalcite, hydrotalcite is widely used in many fields such as adsorption, ion exchange, catalysis, medicine, oil field development, and coatings. Due to its special structure, hydrotalcite has stronger adsorption to pollutants in water, especially anions. In recent years, hydrotalcite has become a research hotspot at home and abroad because of its huge development prospects. At p...

Claims

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Application Information

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IPC IPC(8): C01F7/02
CPCC01F7/785
Inventor 雷春生朱晓锋
Owner CHANGZHOU UNIV
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