Synthesis method of superfine aluminum hypophosphite

A synthesis method and technology of aluminum hypophosphite, applied in the field of flame retardants, can solve the problems of serious environmental pollution, high production energy consumption and high cost, and achieve the effects of uniform particle size, low cost and reduced energy consumption

Pending Publication Date: 2022-04-12
湖北省兴发磷化工研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has the characteristics of huge production energy consumption, serious environmental pollution, high cost and coarse particle size.

Method used

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  • Synthesis method of superfine aluminum hypophosphite
  • Synthesis method of superfine aluminum hypophosphite
  • Synthesis method of superfine aluminum hypophosphite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 100 kg of sodium hypophosphite monohydrate into a 500L reactor, add 200 kg of water, and heat to 85°C to dissolve completely. Add 0.20 kg of polycarboxylate sodium salt and 0.20 kg of sodium hexametaphosphate to the reaction solution and stir for 0.5 hour, stir evenly, the aqueous solution of aluminum chloride (the quality of aluminum chloride and water are respectively 43 kg and 72 kg) to the reaction solution Add dropwise into the liquid, after the dropwise addition is completed, keep warm for 0.5 hours, lower to 50°C, centrifuge, wash with water, and dry to collect the product. Obtain 64.2 kilograms of superfine aluminum hypophosphite flame retardants, and the productive rate is 92%. The particle size of the product is 17.8 μm for D50 and 26.34 μm for D90. see test results figure 1 Particle size distribution diagram.

[0028] Product particle size test results are shown in Table 1:

[0029]

Embodiment 2

[0031] Add 100 kg of sodium hypophosphite monohydrate into a 500L reactor, add 100 kg of water, and heat to 85°C to dissolve completely. Add 0.30 kg of polycarboxylate sodium salt and 0.2 kg of sodium hexametaphosphate to the reaction solution and stir for 0.5 hour, stir evenly, the aqueous solution of aluminum chloride (the quality of aluminum chloride and water are respectively 44 kg and 100 kg) to the reaction solution Add dropwise into the solution, after the dropwise addition, keep warm for 0.5 hours, lower to 50°C, centrifuge, wash with water, and dry to collect the product. Obtain 65.59 kilograms of superfine aluminum hypophosphite flame retardants, and the productive rate is 94%. The particle size of the product is 11.22 μm for D50 and 21.79 μm for D90. see test results figure 2 Particle size distribution diagram.

[0032] Product particle size test results are shown in Table 2:

[0033]

[0034]

Embodiment 3

[0036] Add 100 kg of sodium hypophosphite monohydrate into a 500L reactor, add 50 kg of water, and heat to 85°C to dissolve completely. Add 0.2kg compound sodium phosphate to the reaction solution (complex sodium phosphate is sodium citrate: sodium pyrophosphate: glycerol is compounded according to the molar ratio of 4:5:1.) and 0.2kg polycarboxylate sodium salt are stirred and stirred evenly , the aqueous solution of aluminum chloride (the quality of aluminum chloride and water are respectively 44 kg and 100 kg) is added dropwise to the reaction solution, after the dropwise addition is completed, keep warm for 0.5 hours, drop to 50°C, centrifuge, wash with water, dry and collect product. Obtained 66.8 kilograms of superfine aluminum hypophosphite flame retardants, and the yield was 95.7%. The particle size of the product is 7.633 μm for D50 and 13.42 μm for D90. see test results image 3 Particle size distribution diagram.

[0037] Product particle size test results are s...

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Abstract

The invention relates to a synthesis method of superfine aluminum hypophosphite, which comprises the following steps: by taking sodium hypophosphite and water-soluble aluminum salt as raw materials, water as a solvent and a dispersing agent as a product particle size control agent, reacting at the temperature of 80-100 DEG C to obtain a superfine aluminum hypophosphite flame retardant product. The synthesis method is high in efficiency, low in cost and easy to operate. By adopting the method disclosed by the invention to synthesize the superfine aluminum hypophosphite, the superfine aluminum hypophosphite with fine granularity can be directly obtained without grinding and refining again under the condition of not changing the conventional synthesis production, so that the cost is reduced, and the product competitiveness is enhanced.

Description

technical field [0001] The invention relates to a flame retardant, in particular to a new synthesis method of an ultrafine aluminum hypophosphite flame retardant. Background technique [0002] With the rapid development of polymer materials, electronics, electrical appliances, machinery, automobiles, ships, aerospace and chemical industries, plastic products are more and more widely used in various fields of people's life and production. At the same time, the flammability of plastics causes The fire also brought huge loss of life and property to people. Flame retardants, also known as flame retardants, fire retardants or fire retardants, are functional materials that endow flammable polymers with flame retardancy. Plastic materials processed with flame retardants can effectively Prevent or terminate the spread of flame, so as to achieve flame retardant effect. The use of flame retardants plays a huge role in protecting human life and health and social property safety, so t...

Claims

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Application Information

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IPC IPC(8): C01B25/165C08K3/32
Inventor 田路黄胜超谭家声陈松何欢刘媛
Owner 湖北省兴发磷化工研究院有限公司
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