Method for rapid synthesis of aluminum orthophosphate salt polyalcohol

An aluminum phosphate, polymer technology, applied in phosphorus compounds, chemical instruments and methods, inorganic chemistry and other directions, can solve the problems of harsh equipment material requirements, high energy consumption, unfavorable large-scale continuous industrial production, etc., to save energy, The effect of increasing the synthesis rate and shortening the synthesis time

Inactive Publication Date: 2008-05-07
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can solve the problems of high-temperature and long-term polymerization in the production of aluminum polyphosphate, high energy consumption, strict requirements on equipment materials, and unfavorable for large-scale continuous industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In a 200mL beaker, add 23mL of industrial thermal phosphoric acid (phosphorus content 85.1%), add 10.0g of industrial aluminum hydroxide (first-grade product), pour 8mL of water under stirring, stir evenly with a glass rod, and put it in a microwave oven middle. Select the thawing heating mode, radiate for 8 minutes, then choose 750W power to heat for 12 minutes, take it out after cooling, hydrate and dry at 100°C to obtain 53g of the product, and determine the content of Al 2 o 3 15.24%, with P 2 o 5 70.49%, specific gravity 2.262g / cm 3 , pH=2.78. The resulting product is continued to be placed in a microwave oven, and a power of 900W is selected to irradiate for 20 minutes to obtain aluminum metaphosphate. The product weighs 66 grams and contains Al 2 o 3 19.31%, with P 2 o 5 79.87%, specific gravity 2.952g / cm 3 , pH=4.11.

Embodiment 2

[0042] In a 200mL beaker, add 37.7mL of industrial thermal phosphoric acid (content 85.1%), add 10.0g of industrial aluminum oxide powder (first-grade product), pour 13mL of water under stirring, stir evenly with a glass rod, put in the microwave. Select the thawing heating mode, radiate for 9 minutes, then choose 750W power to heat for 12 minutes, take it out after cooling, hydrate and dry at 100°C to obtain 81g of the product, and determine the content of Al 2 o 3 14.83%, P 2 o 5 71.66%, specific gravity 2.0687g / cm 3 , pH=2.45. The resulting product is continued to be placed in a microwave oven, and 900W power is selected to radiate for 20 minutes to obtain aluminum metaphosphate. The product weighs 65 grams and contains Al 2 o 3 19.01%, with P 2 o 5 80.07%, specific gravity 3.054g / cm 3 , pH=3.98.

Embodiment 3

[0044] In a 200mL beaker, add 32.6mL of wet-process phosphoric acid (content 85.1%), add 10.0g of industrial aluminum hydroxide (first-grade product), pour 3mL of water under stirring, stir evenly with a glass rod, and put it in a microwave oven. Select the thawing heating mode, radiate for 10 minutes, then choose 800W power to heat for 10 minutes, take it out after cooling, hydrate and dry at 100°C to obtain 50g of the product, and determine the content of Al 2 o 3 15.65%, with P 2 o 5 69.22%, specific gravity 2.6670g / cm 3 , pH=2.68. The resulting product is continued to be placed in a microwave oven, and 850W power is selected for 30 minutes of radiation to obtain aluminum metaphosphate. The product weighs 65 grams and contains Al 2 o 3 18.89%, with P 2 o 5 80.42%, specific gravity 3.012g / cm 3 , pH=4.02.

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PUM

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Abstract

The invention discloses a method for rapidly synthesizing aluminum phosphate salt polymeric compound. The method is characterized in that the mixture of phosphoric acid and aluminum hydroxide reacts and the mixture is synthesized under microwave condition. The method comprises the following steps: the phosphoric acid and the aluminum hydroxide are added with water to be mixed and stirred uniformly according to mol ratio; the mixture after being stirred uniformly is put into a microwave oven, and the defrosting and heating mode is selected to radiate the mixture; 750 W is selected to heat the mixture; white aluminum tripolyphosphate powder is gotten through hydrating, drying and grinding. The aluminum tripolyphosphate powder product is put into the microwave oven again to be radiated with 900 W power, and aluminum metaphosphate powder is gotten. The method integrates the reaction and polymerization of the prior art, reduces the composition time, saves the energy and the equipment, and improves the production efficiency. Because of the penetrating action of the microwave, the composition is not limited by the material quantity, and the synthetic ratio of the aluminum tripolyphosphate and the aluminum metaphosphate is improved. Related equipment can be adopted during the industrial production to realize continuous scale production.

Description

technical field [0001] The invention relates to a production method of inorganic polycondensed phosphate, especially a method for preparing polyaluminum phosphate. Background technique [0002] Inorganic polycondensed phosphate is a functional inorganic high polymer with special properties. Polymeric phosphates are generally polymerized by thermal dehydration of metal oxides or hydroxides and phosphoric acid. The molar ratio of the reaction and the heating temperature are different, and cyclic, chain, and branched compounds can be obtained. Among them, aluminum polyphosphate is a kind of polyphosphate that has been researched and applied more, and it includes aluminum tripolyphosphate and aluminum metaphosphate. The application field involves catalysts, pigments, water glass curing agents, ion exchange and adsorption, etc., and has a wide range of uses. In 1970, Masahiro Kobayashi of Kobe University in Japan produced pure aluminum tripolyphosphate for the first time, and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/44C01B25/38
Inventor 袁爱群马少妹白丽娟邓光辉
Owner GUANGXI UNIV FOR NATITIES
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